Page 1 Form No. 05138SL Rev B Groundsmaster ® 3280-D/3320 (Models 30307, 30308, 30309, 30343, 30344, and 30345) © 2018—The Toro® Company Original Instructions (EN) 8111 Lyndale Avenue South Contact us at www.Toro.com. Bloomington, MN 55420 All Rights Reserved...
Page 2 Revision History Revision Date Description 2005 Initial Issue. 2007 Updated Hydraulic chapter. 2018 Updated all chapters and published in new format. Revision History Page 2 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 3 Reader Comments The Toro Company Technical Assistance Center maintains a continuous effort to improve the quality and usefulness of its publications. To do this effectively, we encourage user feedback. Please comment on the completeness, accuracy, organization, usability, and readability of this manual by an e-mail to servicemanuals@toro.com...
Page 4 NOTES: Revision History Page 4 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 5 Operator’s Manuals and Parts Catalog for your machine. Additional copies of the Operator’s Manuals and Parts Catalogs are available at www.toro.com. The Toro Company reserves the right to change the product specifications or this publication without notice. DANGER This safety symbol means danger.
Page 6 g221829 Figure 1 Service Procedure Icons The following icons appear throughout this Service Manual to bring attention to specific important details of a service procedure. Critical Process This icon is used to highlight: • installing safety equipment (shields, guards, seat belts, brakes and R.O.P.S. components) that may have been removed •...
Page 7: Table Of Contents
Table of Contents Preface ........................ 5 Chapter 1: Safety .................... 1–1 Safety Instructions ..................1–2 Jacking Instructions ..................1–6 Safety and Instructional Decals ..............1–6 Chapter 2: Specifications and Maintenance ............ 2–1 Specifications ....................2–2 Torque Specifications ................... 2–5 Shop Supplies .................... 2–11 Special Tools ....................
Page 8 General Information ................... 11–2 Service and Repairs ................... 11–3 Appendix A ......................A–1 Hydraulic Schematic-3280-D (Serial Numbers below 270000400) and 3320 (Serial Numbers below 280000000) .............A–5 Hydraulic Schematic-3280-D (Serial Numbers 270000400 to 311000000) and 3320 (Serial Numbers 280000000 to 311000000) ........A–6 Hydraulic Schematic-3280-D (Serial Numbers 311000001 through 316000000) ....................A–7 Hydraulic Schematic-3280-D (Machine Serial Numbers after...
Page 9 Wire Harness Drawing-Cab Model 30298 Heat/Air Conditioning Blower......................A–36 Wire Harness Diagram-Cab Model 30298 Heat/Air Conditioning Blower......................A–37 Wire Harness Drawing-Light Kit Model 30405 (Machines without Cab) ......................A–38 Wire Harness Diagram-Light Kit Model 30405 (Machines without Cab) ......................A–39 Wire Harness Drawing-North American Light Kit Model 30701 (Machines Serial Number 315000000 and Up).............A–40 Wire Harness Diagram-North American Light Kit Model 30701 (Machines Serial Number 315000000 and Up).............A–41...
Page 10 Preface Page 10 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 11: Chapter 1: Safety
Chapter 1 Safety Table of Contents Safety Instructions ..........................1–2 Supervisor’s Responsibilities ......................1–2 Before Operating the Machine ......................1–2 While Operating the Machine ......................1–3 Maintenance and Service........................1–4 Jacking Instructions ..........................1–6 Raising the Front of the Machine......................1–6 Raising the Rear of the Machine ......................
Page 12: Safety Instructions
Safety Instructions The Groundsmaster 3280-D and 3320 machines meet or exceeds safety standard specifications when weights are installed according to information in the Operator’s Manual. Although hazard control and accident prevention are partially dependent upon the design and configuration of the machine, these...
Page 13 While Operating the Machine • Sit on the seat when starting and operating the machine. • Anytime you park the machine (short or long term), lower the cutting deck (or implement) to the ground. IMPORTANT When you lower the cutting deck to the ground, the pressure from the hydraulic lift circuit releases and prevents the cutting deck from accidentally lowering.
Page 14 Jacking Instructions (page 1–6). • If major repairs are necessary, contact your Authorized Toro Distributor. Safety: Safety Instructions Page 1–4 Groundsmaster ® 3280-D/3320...
Page 15 At the time of manufacture, the machine conformed to the safety standards for riding mowers. To ensure the optimum performance and continued safety certification of the machine, use genuine Toro replacement parts and accessories. The replacement parts and accessories of other manufacturers can result in non-conformance with the safety standards and can void the warranty.
Page 16: Jacking Instructions
Numerous safety and instruction decals are affixed to the traction unit and cutting units of your Groundsmaster. If any decal becomes illegible or damaged, install a new decal. Decal part numbers are listed in your Parts Catalog. Order replacement decals from Authorized Toro Distributor. Safety: Jacking Instructions Page 1–6 Groundsmaster ®...
Page 17: Chapter 2: Specifications And Maintenance
Chapter 2 Specifications and Maintenance Table of Contents Specifications ............................2–2 Decimal and Millimeter Equivalents ....................2–3 U.S. to Metric Conversions ........................ 2–4 Torque Specifications ........................... 2–5 Identifying the Fastener........................2–5 Calculating the Torque Values When Using a Drive-Adapter Wrench ..........2–7 Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch Series)..........
Page 18: Specifications
Parts Catalogs for those options at the end of this chapter. The maintenance procedures and recommended service intervals for Groundsmaster 3280-D and Groundsmaster 3320 are covered in the Operator’s Manuals. Refer to this publication when performing the regular equipment maintenance.
Page 19 Decimal and Millimeter Equivalents Fractions Decimals Fractions Decimals 1/64 0.015625 0.397 33/64 0.515625 13.097 1/32 0.03125 0.794 17/32 0.53125 13.494 3/64 0.046875 1.191 35/64 0.546875 13.891 1/16 0.0625 1.588 9/16 0.5625 14.288 5/64 0.078125 1.984 37/64 0.578125 14.684 3/32 0.09375 2.381 19/32 0.59375...
Page 20 U.S. to Metric Conversions To Convert Into Multiply By Linear Measurement Miles Kilometers 1.609 Yards Meters 0.914 Feet Meters 0.305 Feet Centimeters 30.48 Inches Meters 0.025 Inches Centimeters 2.54 Inches Millimeters 25.4 Area Square Miles Square Kilometers 2.59 Square Feet Square Meters 0.093 Square Inches...
Page 21: Torque Specifications
Torque Specifications The recommended fastener torque values are listed in the following tables. For critical applications, as determined by Toro, either the recommended torque or a torque that is unique to the application is clearly identified and specified in this Service Manual.
Page 22 Toro recommends replacing fasteners with a locking feature once they have been removed because the effectiveness of the locking feature diminishes with each reuse. If it is necessary to reuse a fastener with a locking feature; apply a thread locking compound (Loctite for example) to the fastener during installation.
Page 23 Calculating the Torque Values When Using a Drive-Adapter Wrench g211753 Figure 4 Drive-adapter wrench Torque wrench Effective length of torque wrench Effective length of torque wrench + drive-adapter wrench Using a drive-adapter wrench (e.g., crowfoot wrench) in any position other than 90°...
Page 24 Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Inch Series) Thread Size Grade 1, 5 SAE Grade 1 Bolts, Screws, SAE Grade 5 Bolts, Screws, SAE Grade 8 Bolts, Screws, and 8 with Studs, and Sems with Studs, and Sems with Studs, and Sems with Thin Height Regular Height Nuts...
Page 25 Standard Torque for Dry, Zinc Plated, and Steel Fasteners (Metric Fasteners) Class 8.8 Bolts, Screws, and Class 10.9 Bolts, Screws, and Thread Size Studs with Regular Height Nuts Studs with Regular Height Nuts (Class 8 or Stronger Nuts) (Class 10 or Stronger Nuts) M5 X 0.8 57 ±...
Page 26 Other Torque Specifications SAE Grade 8 Steel Set Screws Recommended Torque Thread Size Square Head Hex Socket 1/4 - 20 UNC 140 ± 20 in-lb 73 ± 12 in-lb 5/16 - 18 UNC 215 ± 35 in-lb 145 ± 20 in-lb 3/8 - 16 UNC 35 ±...
Page 27: Shop Supplies
Shop Supplies The procedures found in this Service Manual may recommend the use of commonly used shop supplies (lubricants, sealants, and adhesives). A symbol denoting the use of a shop supply may appear in figures that support a procedure. Always refer to the written procedure for specific information regarding the type and the application of a shop supply.
Page 28 Anti-seize lubricant Used to prevent corrosion, galling, and seizure between metal parts. Most often applied to shafts and bores during assembly. Unless otherwise specified, high viscosity regular grade lithium-graphite based anti-seize lubricant should be used. Grease Can be used to pre-fill (pack) bearings, boots, and seals before assembly, ease installation of components during assembly, or fill cavities between moving parts through grease fittings after assembly.
Page 29: Special Tools
Special Tools You can order these special tools from your Toro Distributor. Some tools may also be available from a local tool supplier. Hydraulic Pressure Testing Kit Toro Part No. TOR47009 Use this kit to take various pressure readings for diagnostic tests. Quick...
Page 30 20 to 150 LPM (4 to 40 GPM). Note: This tester does not include any hydraulic hoses or fittings; refer to Hydraulic Hose Kit Toro Part No. TOR6007 and Hydraulic Test Fitting Kit Tor Part No. TOR4079. Hydraulic O-Ring Kit Toro Part No.
Page 31: Specifications
Hydraulic Test Fitting Kit Toro Part No. TOR4079 This kit includes a variety of O-ring face seal fittings to let you connect the test gauges into the system. FITTING TYPE SIZE PART NUMBER 4 ORFS (9/16–18) TOR4079–3 6 ORFS (11/16–16) TOR4079–12...
Page 32 Note: This kit does not include the hydraulic hoses; refer to Hydraulic Hose Kit (page 2–14). Note: The replacement filter element is Toro Part No. TOR6012. The filter element canister tightening torque is 34 N∙m (25 ft-lb). Remote Starter Switch After flushing the hydraulic system or replacing a hydraulic component (e.g.
Page 33: Specifications
This excess current can damage the circuits that are not designed to carry it. Battery Terminal Protector Toro Part No. 107-0392 Use this aerosol spray on the battery terminals, ring terminals, and fork terminals to reduce corrosion problems. Apply the...
Page 34 Specifications and Maintenance: Special Tools Page 2–18 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 35: Chapter 3: Gasoline Engine
Chapter 3 Gasoline Engine Table of Contents Specifications ............................3–2 Engine - Groundsmaster 3320-G ....................... 3–2 General Information ..........................3–4 Adding Oil to Engine .......................... 3–5 Adjustments ............................3–6 Adjust Throttle Control ........................3–6 Adjust Choke Control ......................... 3–6 Adjust Engine Speed ......................... 3–8 Service and Repairs ..........................
Page 36: Specifications
Specifications Groundsmaster 3320-G g243929 Figure 5 Engine cooling fan Engine oil filter Alternator Flywheel Engine - Groundsmaster 3320-G Item Description Make/Designation Briggs and Stratton/Daihatsu, 4−stroke, Liquid Cooled, OHV, Gasoline Number of Cylinders Bore x Stroke mm (inches) 72 x 78 (2.834 x 3.07) Total Displacement cm 952 (58.1) Compression Ratio...
Page 37 Engine - Groundsmaster 3320-G (continued) Item Description Water Pump Belt driven centrifugal type Cooling System Capacity (including reserve 4.3 (4.5) tank) L (US qt) Starter 12 VDC 1.2 KW Alternator/Regulator 12 VDC 40 A Groundsmaster ® 3280-D/3320 Page 3–3 Gasoline Engine: Specifications 05138SL Rev B...
Page 38: General Information
Service and repair parts for Briggs and Stratton/Daihatsu gasoline engines are supplied through your local Toro Distributor. If no parts list is available, be sure to provide your distributor with the Toro model and serial number.
Page 39 Adding Oil to Engine g230306 Figure 6 Note clearance When adding oil to the engine, maintain clearance between the oil fill device and the oil fill opening in the valve cover (Figure 6). This clearance is necessary to allow venting when adding engine oil which will prevent oil from running into the breather tube and intake system.
Page 40: Adjustments
Adjustments Adjust Throttle Control g230313 Figure 7 Speed control lever Cable clamp screw Throttle control cable High speed screw Proper throttle operation is dependent upon proper adjustment of throttle control. Ensure that the throttle control is operating properly. 1. Move remote throttle control lever to F position.
Page 41 Adjust Choke Control (continued) 1. Move choke control lever to S position. TART 2. Check position of choke lever on carburetor. Choke lever should be fully closed when choke lever is in S position. TART 3. If necessary, choke control can be adjusted by loosening cable clamp screw and repositioning choke cable until carburetor choke lever is fully closed when choke control lever is in S position.
Page 42 Adjust Engine Speed 1. Allow engine to reach operating temperature before checking or adjusting engine speed. Ensure that the throttle control is adjusted properly before adjusting engine speed; refer to Adjust Throttle Control (page 3–6). 2. Park machine on a level surface, lower cutting deck (or implement), and engage parking brake.
Page 43: Service And Repairs
Service and Repairs Fuel System g230317 Figure 11 Fuel tank Hose clamp Grommet Seat plate Fuel hose (tank venting) Fuel gauge Flange-head screw (2 each) Fuel hose (fuel pump to carburetor) 25. Control panel Grommet Hose clamp Thumb screw (4 each) Knob Fuel hose (fuel supply) Retaining ring...
Page 44 DANGER Because gasoline is highly flammable, use caution when storing or handling it. Do not smoke while filling the fuel tank. Do not fill fuel tank while engine is running, hot, or when machine is in an enclosed area. Always fill fuel tank outside and wipe up any spilled fuel before starting the engine.
Page 45 Removing the Fuel Tank (continued) g230318 Figure 12 Knob Lower control panel Flange nut Flange-head screw Throttle control Choke control Lift control lever 6. Remove flange-head screws and flange nut that secure lower control panel to machine (Figure 12). 7. Remove locknut (item 31 in Figure 11) and flat washer from left fender.
Page 46 Air Cleaner Removing the Air Cleaner 1. Remove air cleaner components as necessary (Figure 13). 2. Refer to the Traction Unit Operator’s Manual for air cleaner service procedures. g230319 Figure 13 Air cleaner assembly Hose clamp Air inlet hose Flat washer (2 each) Bolt (2 each) Bolt (2 each) Locknut...
Page 47 Radiator g230307 Figure 14 Radiator Hose clamp Coolant reservoir Hydraulic hose Vent tube Hose Screw (8 each) Clamp (2 each) Reservoir cap Radiator shield Lower radiator hose Overflow hose Intake cover Hose clamp Radiator cap Flange nut (8 each) Upper radiator hose Locknut (4 each) Screen Fan shroud...
Page 48 Removing the Radiator (continued) CAUTION Do not open radiator cap or drain coolant if the radiator or engine is hot. Pressurized, hot coolant can escape and cause burns. Ethylene-glycol antifreeze is poisonous. Dispose of coolant properly, or store it in a properly labeled container away from children and pets.
Page 49 Engine g230308 Figure 15 Engine Hex nut (4 each) Spacer (4 each) Muffler bracket Frame trim Rebound washer (4 each) Lock washer Spacer Bolt (4 each) Negative battery cable Bolt (2 each per mount) Locknut (2 each per mount) Flat washer Engine shock mount (red patch) Lock washer (2 each per mount) Bolt...
Page 50 Removing the Engine 1. Park machine on a level surface, lower cutting deck (or implement), shut off the engine, and remove key from the key switch. Chock wheels to keep the machine from moving. 2. Open hood; refer to the Traction Unit Operator’s Manual. 3.
Page 51 Removing the Engine (continued) g230310 Figure 17 Radiator Bolt Overflow hose Locknut Fan shroud Coolant reservoir Hose clamp Flat washer 7. Loosen hose clamp and remove overflow hose from radiator fill opening (Figure 17). Remove coolant reservoir from bracket on radiator fan shroud. 8.
Page 52 Removing the Engine (continued) 12. Disconnect hoses from engine. A. Loosen clamps and disconnect upper and lower radiator hoses from the engine. B. At carburetor, loosen hose clamp and disconnect fuel hose. Plug hose to prevent leakage and contamination. 13. Disconnect transmission driveshaft from engine pulley; refer to Removing the Transmission Driveshaft (page 5–87).
Page 53 Removing the Engine (continued) g230312 Figure 19 Gasoline engine Bolt Engine bracket Engine bracket Pivot plate Flat washer Engine bracket 17. If necessary, remove engine brackets from engine (Figure 19). Installing the Engine 1. Locate machine on a level surface with cutting deck (or implement) lowered and key removed from the key switch.
Page 54 Installing the Engine (continued) CAUTION One person should operate lift or hoist while the other person guides the engine into the machine. IMPORTANT Ensure not to damage the engine, fuel hoses, hydraulic lines, electrical harness, or other parts while installing the engine. C.
Page 55 Installing the Engine (continued) 18. Install battery to machine; refer to Servicing the Battery (page 6–80). 19. Check engine oil level; refer to the Traction Unit Operator’s Manual. 20. Connect positive (+) and then negative (-) battery cables to the battery. 21.
Page 56 Gasoline Engine: Service and Repairs Page 3–22 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 57: Chapter 4: Diesel Engine
Chapter 4 Diesel Engine Table of Contents Specifications ............................4–2 Engine - Groundsmaster 3280-D ....................... 4–2 General Information ..........................4–4 Traction Unit Operator’s Manual ......................4–4 Engine Identification........................... 4–4 Kubota Engine Workshop Manuals ....................4–5 Adjustments ............................4–6 Adjusting the Throttle Control......................4–6 Service and Repairs ..........................
Page 58: Specifications
Figure 20 Starter motor Engine oil filter Fuel injection pump Alternator Flywheel Engine cooling fan Engine - Groundsmaster 3280-D Item Description Make/Designation Kubota D1105: 4-cycle, 3 cylinder water cooled diesel. EPA Tier 4 compliant. Bore 78 mm (3.07 inches) Stroke 78.4 mm (3.09 inches)
Page 59 Engine - Groundsmaster 3280-D (continued) Item Description Oil pump Gear driven trochoid type Coolant capacity 7.6 L (8 US qt) Alternator/Regulator 12 VDC, 40 A Engine weight (dry) 93 kg (205 lb) Groundsmaster ® 3280-D/3320 Page 4–3 Diesel Engine: Specifications...
Page 60: General Information
Service and repair parts for the Kubota engines are supplied through your Authorized Toro Distributor. If the parts list is not available, provide your distributor with the Toro model and serial number of your machine as well as the Kubota engine model and serial numbers.
Page 61 Kubota Engine Workshop Manuals The engine that powers your Groundsmaster 3280-D is a Kubota D1105 Tier 4 compliant engine. Kubota Engine Workshop Manuals are available for these engines. To ensure the correct engine workshop manual is used when servicing the engine on your machine, refer to the engine group code on the emission control information label to identify the "E"...
Page 62: Adjustments
Adjustments Adjusting the Throttle Control g221634 Figure 21 Speed control lever High speed screw Throttle cable Proper throttle operation is dependent upon proper adjustment of the throttle control. Ensure that the throttle control is operating properly. 1. Move the remote throttle control lever to the F position 2.
Page 63: Service And Repairs
Service and Repairs Air Cleaner System g221635 Figure 22 Air cleaner inlet hose Hose clamp (3 each) Flat washer (2 each) Air cleaner outlet hose Air cleaner mount Locknut (2 each) Air cleaner assembly Bolt (2 each) Removing the Air Cleaner System Note: Refer to the Operator's Manual for maintenance procedures and intervals of the air cleaner.
Page 64 Installing the Air Cleaner System IMPORTANT Leaks in the air filter system will allow dirt to enter into the engine and can cause serious engine damage. Ensure that all the air cleaner components are in good condition and are properly secured during installation.
Page 65 Exhaust System g222270 Figure 24 Gasket Exhaust muffler Bolt (2 each) Upper alternator brace Flange nut (2 each) Muffler mount Flange nut (4 each) Hardened washer (4 each) Engine Removing the Exhaust System CAUTION A hot engine and exhaust system can cause burns. Allow the engine and the exhaust system to cool before working on or near them.
Page 66 Removing the Exhaust System (continued) 3. Remove the 2 bolts (item 7 in Figure 24), 4 hardened washers, and 2 flange nuts that secure the exhaust muffler to the muffler mount. 4. Remove the 4 flange nuts (item 3 in Figure 24) from the exhaust manifold studs.
Page 67 Radiator g221637 Figure 25 Swell latch (2 each) Radiator cap Flange-head screw Lock washer (6 each) (4 each) Flange nut (6 each) Hose clamp (3 each) Pop rivet (4 each) Hex nut (6 each) Flange nut (4 each) Locknut (8 each) Back washer (2 each) Vent hose Radiator frame...
Page 68 Removing the Radiator 1. Park the machine on a level surface, lower the cutting deck (or implement), shut off the engine, set the parking brake, and remove the key from the key switch. 2. Unlatch the hood and raise it. DANGER If the radiator or engine is hot, pressurized hot coolant can escape and cause burns.
Page 69 Removing the Radiator (continued) 12. Remove the 2 bolts, 2 flat washers, and 2 locknuts that secure the coolant reservoir assembly (item 20 in Figure 25) to the fan shroud. Carefully position the coolant reservoir away from the fan shroud. 13.
Page 70 Installing the Radiator (continued) 4. Position the fan shroud (item 21 in Figure 25) to the radiator. Secure the fan shroud to the radiator with the 4 fasteners, 6 flat washers, and 4 locknuts. Ensure that at least 6.4 mm (0.250 inch) clearance exists at all points between the fan shroud and the fan.
Page 71 Fuel System g221626 Figure 26 Fuel gauge Radiator frame Fuel cap Locknut Thumb screw (4 each) Clamp Hose clamp (6 each) Spacer Control panel Hose clamp Fuel hose (separator to Flat washer injector) Flange-head screw Vent hose Fuel hose (fuel pump to Bolt (2 each) separator)
Page 72 DANGER Diesel fuel is highly flammable and explosive. A fire or an explosion from the fuel can burn you, burn other people, and damage property. • Use caution whenever you store or handle diesel fuel. • Do not smoke while filling the fuel tank. •...
Page 73 Removing the Fuel Tank (continued) g221627 Figure 27 Flange nut Washer-head screw (2 Locknut (2 each) each) Flange-head screw Flange-head screw (3 each) Throttle control Console 9. Remove the flange-head screws and flange nut that secure the lower control panel to the machine (Figure 27).
Page 74 Installing the Fuel Tank (continued) 8. Connect the seat switch to the machine wire harness. 9. Connect the negative battery cable to the negative battery post. 10. Fill the fuel tank with clean fuel; refer to the Operator’s Manual. 11. Prime the fuel system; refer to Priming the Fuel System (page 4–16).
Page 75 Engine g222271 Figure 28 Driveshaft assembly Lock washer (2 each) Bolt (4 each) Upper engine shock mount (4 each) 10. Flat washer Rebound washer (4 each) Flat washer (3 each) Battery retainer Lower engine shock mount (4 each) Locknut (3 each) Bolt (3 each) Flat washer (3 each) Engine...
Page 76 Removing the Engine 1. Park the machine on a level surface, lower the cutting deck (or implement), shut off the engine, set the parking brake, and remove the key from the key switch. 2. Unlatch the hood and raise it. 3.
Page 77 Removing the Engine (continued) g221629 Figure 29 Hose clamp Coolant reservoir Upper radiator hose assembly Flat washer (8 each) Locknut (6 each) Hose clamp (4 each) Fan shroud Lower radiator hose Bolt (4 each) Reservoir hose Carriage bolt (2 each) Radiator 7.
Page 78 Removing the Engine (continued) g221630 Figure 30 Cable end Cable clamp 12. Remove the throttle cable from the injector pump (Figure 30) as follows: A. Remove the retaining ring that secures the throttle cable end to the injector pump control arm. B.
Page 79 Removing the Engine (continued) C. Cover or plug the fuel hoses and pump fittings openings to prevent contamination. Position the disconnected hoses away from the engine. 14. Remove the hydraulic pump/transmission driveshaft; refer to Removing the Hydraulic Pump Driveshaft (page 5–97) Removing the Transmission Driveshaft (page 5–87).
Page 80 Removing the Engine (continued) IMPORTANT When removing the engine ensure that you do not damage the engine, fuel hoses, hydraulic lines, electrical harness or other parts. 19. Carefully raise the engine and remove from the machine. 20. If necessary, remove the engine brackets from the engine (Figure 32 Figure 33).
Page 81 Installing the Engine (continued) g221633 Figure 33 Left rear engine bracket Left front engine bracket Lock washer (8 each) Engine Bolt (8 each) 2. If the engine brackets were removed from the engine, install the brackets to the engine (Figure 32 Figure 33).
Page 82 Installing the Engine (continued) IMPORTANT When installing the engine ensure that you do not damage the engine, fuel hoses, hydraulic lines, electrical harness, radiator or other parts. 6. Carefully lower the engine to the machine frame. Ensure that the fastener holes of the engine brackets are aligned with the holes in the upper and lower engine shock mounts (items 2 and 19 in Figure...
Page 83 Installing the Engine (continued) IMPORTANT Ensure that the clutch pulley and PTO pulley are aligned during PTO shaft installation. 16. Install the PTO shaft to the machine; refer to Installing the PTO Shaft (page 9–9). 17. Position the fan shroud to the radiator. Ensure that a minimum of 6.4 mm (0.25 inch) clearance exists at all points between the shroud and the fan.
Page 84 Diesel Engine: Service and Repairs Page 4–28 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 85 Chapter 5 Hydraulic System Table of Contents Specifications ............................5–3 Groundsmaster 3280-D and 3320-G....................5–3 General Information ..........................5–4 Checking the Hydraulic Fluid ......................5–4 Pushing or Towing the Traction Unit ....................5–5 Releasing Pressure from the Hydraulic System ................. 5–6 Traction Circuit Component Failure....................
Page 86: Service And Repairs
Equipped)............................5–133 Lift Control Valve (Machine Serial Number above 311000000)............5–136 Servicing the Lift Control Valve (Machine Serial Number above 311000000) ........5–139 Oil Cooler (Groundsmaster 3280-D) ....................5–142 Additional Reference Materials DANFOSS DDC20 AXIAL PISTON PUMP SERVICE MANUAL DANFOSS SERIES 15 AXIAL PISTON PUMPS, MOTORS AND TRANSMISSIONS REPAIR MANUAL...
Page 87: Specifications
Specifications Groundsmaster 3280-D and 3320-G Item Description Hydrostatic transmission (Machine Serial Number below Danfoss Series 15 U Style Axial Piston Transmission 316000000) Gerotor Pump in Hydrostat Charge pump (Machine Serial Number below 316000000) Danfoss, DDC20 Axial Piston Pump Hydraulic pump (Machine Serial Number above 316000000)
Page 88: General Information
General Information The Operator's Manual provides information regarding the operation, general maintenance procedures, and maintenance intervals for your machine. Refer to the Operator's Manual for additional information when servicing the machine. Checking the Hydraulic Fluid g224909 Figure 34 Hydraulic reservoir dipstick The hydraulic system on your machine is designed to operate on high quality hydraulic fluid.
Page 89: Pushing Or Towing The Traction Unit
Pushing or Towing the Traction Unit IMPORTANT If towing limits are exceeded, severe damage to the hydraulic pump may occur. g230813 Figure 35 Check valve location g224908 Figure 36 Hydraulic pump (for Models 30344 and Bypass valve 30345) If it becomes necessary to tow or push the machine, tow or push at a speed below 4.8 km/h (3mph), and for a very short distance.
Page 90: Releasing Pressure From The Hydraulic System
Releasing Pressure from the Hydraulic System Release all the pressure in the hydraulic system before you work on the hydraulic system. System pressure in the cutting circuit is released when the cutting deck is disengaged. Releasing the Hydraulic Pressure from the Traction Circuit Note: If you park the machine on an incline or slope, the pressure in the traction circuit does not release.
Page 91: Traction Circuit Component Failure
Traction Circuit Component Failure The traction circuit of the Groundsmaster 3280-D and 3320 machines is a closed loop system that includes the hydraulic pump and hydraulic motor. If a component failure occurs in the traction circuit (e.g., hydraulic pump or hydraulic motor), unwanted material and contamination from the damaged component will circulate throughout the traction circuit.
Page 92: Hydraulic Hoses
For more hydraulic hose information; refer to Hydraulic Hose Servicing of the Toro Basics Series Training Books (Part No. 94813SL) found on the Service Reference Set available from your Authorized Toro Distributor.
Page 93: Installing The Hydraulic Hose And Tube (O-Ring Face Seal Fitting)
Installing the Hydraulic Hose and Tube (O-Ring Face Seal Fitting) 1. Ensure that all the threads, the sealing surfaces of the hose/tube, and the fitting are free of burrs, nicks, scratches, or unwanted material. 2. To help prevent a hydraulic leak, replace the face seal O-ring when you open the connection.
Page 94 Installing the Hydraulic Hose and Tube (O-Ring Face Seal Fitting) (continued) C. Use a second wrench to tighten the nut to the correct Flats From Wrench Resistance (FFWR); refer to the Flats From Wrench Resistance Table (page 5–10). Note: The markings on the nut and body of the fitting show that the connection is correctly tightened.
Page 95: Installing The Hydraulic Fittings (Sae Straight Thread O-Ring Fitting Into The Component Port)
Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fitting into the Component Port) Installing the Non-Adjustable Fittings 1. Ensure that all the threads, the sealing surfaces of fitting, and the component port are free of burrs, nicks, scratches, or unwanted material. 2.
Page 96 Installing the Non-Adjustable Fittings (continued) Fitting Installation Torque Table Fitting Dash Fitting Port Installation Torque Into Installation Torque Into Size Side Thread Steel Port Aluminum Port Size (inch(es) - threads per inch) 7/16—20 21 to 25 N∙m (15 to 19 ft-lb) 13 to 15 N∙m (9 to 11 ft-lb) 1/2—20 25 to 29 N∙m (18 to 22 ft-lb)
Page 97 Installing an Adjustable Fitting 1. Ensure that all the threads, the sealing surfaces of fitting, and the component port are free of burrs, nicks, scratches, or unwanted material. 2. To help prevent a hydraulic leak, replace the O-ring when you open the connection.
Page 98 Installing an Adjustable Fitting (continued) 7. Hold the fitting in the correct alignment with a wrench and use a torque wrench and tighten the fitting to the recommended torque value within the specified range of torque values; refer to the Fitting Installation Torque Table (page 5–12).
Page 99: Hydraulic Schematics
Hydraulic Schematics g243932 Figure 42 Groundsmaster ® 3280-D/3320 Page 5–15 Hydraulic System: Hydraulic Schematics 05138SL Rev B...
Page 100 g229581 Figure 43 Hydraulic System: Hydraulic Schematics Page 5–16 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 101 g243934 Figure 44 Groundsmaster ® 3280-D/3320 Page 5–17 Hydraulic System: Hydraulic Schematics 05138SL Rev B...
Page 102 g224768 Figure 45 Hydraulic System: Hydraulic Schematics Page 5–18 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 103: Hydraulic Flow Diagrams
Hydraulic Flow Diagrams Traction Circuit (Machine Serial Number below 316000000) Forward Direction The hydrostatic transmission input shaft is rotated by a driveshaft off the front of the engine crankshaft. Pushing the top of the traction pedal rotates the variable displacement pump swash plate in the transmission to create a flow of fluid. This fluid is directed to the fixed displacement motor in the transmission which turns the front axle input shaft to drive the front wheels in the forward direction.
Page 104 Forward Direction (continued) g229585 Figure 46 Hydraulic System: Hydraulic Flow Diagrams Page 5–20 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 105 Forward Direction (continued) g246024 Figure 47 Groundsmaster ® 3280-D/3320 Page 5–21 Hydraulic System: Hydraulic Flow Diagrams 05138SL Rev B...
Page 106 Forward Direction (continued) g246025 Figure 48 Hydraulic System: Hydraulic Flow Diagrams Page 5–22 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 107 Reverse Direction The traction circuit operates essentially the same in reverse as it does in the forward direction. However, the flow through the circuit is reversed. Pushing the bottom of the traction pedal rotates the variable displacement pump swash plate in the transmission to create a flow of fluid.
Page 108: Traction Circuit (Machine Serial Number Above 316000000)
Traction Circuit (Machine Serial Number above 316000000) The hydraulic traction circuit is a closed loop system consisting of a variable displacement hydraulic pump and a hydraulic drive axle motor. The hydraulic pump is driven by a drive shaft connected to the engine crankshaft. Forward Direction Pressing the top of traction pedal, angles the hydraulic pump swash plate to create a flow of fluid.
Page 109 Forward Direction (continued) g224777 Figure 49 Groundsmaster ® 3280-D/3320 Page 5–25 Hydraulic System: Hydraulic Flow Diagrams 05138SL Rev B...
Page 110 Reverse Direction The traction circuit operates essentially the same in reverse as it does in the forward direction. However, the flow through the circuit is reversed. Pushing the bottom of the traction pedal rotates the variable displacement pump swash plate in the hydraulic pump to create a flow of fluid. This fluid is directed to the fixed displacement motor which turns the differential input shaft to drive the front wheels in a reverse direction.
Page 111: Lift Circuit (Machine Serial Number Below 311000000)
Lift Circuit (Machine Serial Number below 311000000) The hydrostatic transmission charge pump supplies charge oil for the closed loop traction circuit in addition to supplying flow for the steering circuit and the lift circuit. The charge pump takes its suction through a filter from the reservoir (front axle).
Page 112 Raise Cutting Deck (or Implement) (continued) g246023 Figure 51 When the cutting deck (or implement) is to be raised, the control valve spool is positioned rearward and flow is directed out the B port of the control valve to the cap (upper) end of the lift cylinders.
Page 113 Lower Cutting Deck (or Implement) g229582 Figure 52 g246022 Figure 53 Groundsmaster ® 3280-D/3320 Page 5–29 Hydraulic System: Hydraulic Flow Diagrams 05138SL Rev B...
Page 114 Lower Cutting Deck (or Implement) (continued) When the cutting deck (or implement) is to be lowered, the control valve spool is moved forward causing the pilot valve to shift open. This shifted valve allows a return path from the lift cylinders to the reservoir (front axle) (Figure 52).
Page 115: Lift Circuit (Machine Serial Number Above 311000000)
Lift Circuit (Machine Serial Number above 311000000) The charge pump supplies charge fluid for the closed loop traction circuit in addition to supplying flow for the steering circuit and the lift circuit. The charge pump takes its suction through a filter from the transaxle reservoir (front axle). The pump output flows to the steering control valve before reaching the lift manifold so that the steering circuit has priority.
Page 116 Raise the Cutting Deck (or Implement) (continued) g224770 Figure 54 Hydraulic System: Hydraulic Flow Diagrams Page 5–32 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 117 Lower the Cutting Deck (or Implement) As previously described, when the lift switch is neither in the R or L AISE OWER position, fluid pressure shifts the logic cartridge LC open to provide a fluid path to the tank. When the lift switch is set to the L position, solenoid valve SV2 OWER is energized to open a path for fluid trapped behind the lift cylinder pistons to...
Page 118 Lower the Cutting Deck (or Implement) (continued) g224769 Figure 55 Hydraulic System: Hydraulic Flow Diagrams Page 5–34 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 119: Steering Circuit (Machine Serial Number Below 316000000)
Steering Circuit (Machine Serial Number below 316000000) g229584 Figure 56 The charge pump in the transmission supplies flow for the steering circuit and for the lift circuit. Charge pump output flows to the steering control valve before reaching the lift valve so that the steering circuit has priority. Steering circuit pressure is limited to 5,515 kPa (800 psi) by the implement relief valve located in the transmission.
Page 120 Right Turn When a right turn is made with the engine running, the turning of the steering wheel positions the steering control spool valve so that flow goes through the top of the spool. Flow entering the steering control valve at the P port passes through the rotary meter and is directed out port R.
Page 121: Steering Circuit (Machine Serial Number Above 316000000)
Steering Circuit (Machine Serial Number above 316000000) The charge pump supplies flow for the steering circuit and for the lift circuit. The pump output flows to the steering control valve before reaching the lift manifold so that the steering circuit has priority. The steering circuit pressure is limited to 7,239 kPa (1,050 psi) by a relief valve located in the steering control valve.
Page 122 Right Turn (continued) g224774 Figure 57 Hydraulic System: Hydraulic Flow Diagrams Page 5–38 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 123: Special Tools
Special Tools You can order these special tools from your Toro Distributor. Some tools are also available from a local tool supplier. Hydraulic Pressure Testing Kit Toro Part No. TOR47009 Use this kit to take various pressure readings for diagnostic tests.
Page 124: Gpm Hydraulic Tester (Pressure And Flow)
40 GPM Hydraulic Tester (Pressure and Flow) Toro Part No. AT40002 Use this tester to test the hydraulic circuits and components for flow and pressure capacities as recommended in Testing the Hydraulic System (page 5–47). This tester includes the following: •Load Valve: Turn the valve to restrict the flow to create a...
Page 125: Hydraulic Test Fitting Kit
Hydraulic Test Fitting Kit Toro Part No. TOR4079 This kit includes a variety of O-ring face seal fittings to let you connect the test gauges into the system. PART NUMBER FITTING TYPE SIZE 4 ORFS (9/16–18) TOR4079–3 6 ORFS (11/16–16) TOR4079–12...
Page 126: O-Ring Kit
Note: This kit does not include the hoses; refer to Hydraulic Hose Kit (page 5–40). Note: The replacement filter element is Toro Part No. TOR6012. The filter element cannister tightening torque is 34 N∙m (25 ft-lb). Hydraulic System: Special Tools Page 5–42...
Page 127: Remote Starter Switch
Starter motor B+ terminal A remote stater switch can also be constructed using the Toro switch #106-2027, a length of 14 gauge wire, a 20 A in-line fuse, 2 alligator clips, and necessary connectors. Connecting the wire to switch terminals 1 and 2 will allow the momentary switch contacts to be used for the remote starter switch ().
Page 128: Troubleshooting
Troubleshooting The following chart contains suggestions that can be used to solve performance issues specific to the hydraulic system. The suggestions are not all-inclusive. There can be more than 1 cause for a machine malfunction. Review the hydraulic schematic found in Appendix A (page A–1) and information on the hydraulic system operation in the...
Page 129: Traction Circuit Problems
Traction Circuit Problems Problem Possible Causes Traction jerky when starting. • Friction wheel on traction pedal out of adjustment or worn (except 3280-D Models 30344 and 30345). • The traction control linkage is incorrectly adjusted, disconnected, binding, or damaged. • The hydrostat/hydraulic pump check valve is not seating or is damaged.
Page 130: Lift/Lower Circuit Problems
Lift/Lower Circuit Problems Problem Possible Causes The cutting deck (or implement) will not lift or lifts slowly. • Engine RPM is too low. • The cutting deck has excessive unwanted elements in cutting chambers. • The lift arm or lift cylinder is binding. •...
Page 131: Testing The Hydraulic System
Testing the Hydraulic System The most effective procedure to isolate the problems in the hydraulic system is to use hydraulic test equipment, such as pressure gauges and flow meters in the circuits during different operational checks; refer to Special Tools (page 5–39).
Page 132 IMPORTANT Use 2 people to perform all the tests, with 1 person in the seat and the other to read and record the test results. 1. Clean the machine fully before you disconnect or disassemble the hydraulic components. Note: Cleanliness is required whenever you work on the hydraulic equipment.
Page 133: Charge Pressure Test (Using Pressure Gauge) (Machine Serial Numbers Below 316000000)
Charge Pressure Test (Using Pressure Gauge) (Machine Serial Numbers below 316000000) A charge pressure test should be performed to identify if a worn or damaged hydrostatic transmission is causing a hydraulic system problem. Note: Before conducting charge pressure test, determine counterbalance pressure setting for the machine;...
Page 134 Charge Pressure Test (Using Pressure Gauge) (Machine Serial Numbers below 316000000) (continued) 4. Clean the area around the 1/8 inch pipe plug located on the top of the transmission between the 2 check valves (Figure 59 Figure 60). Remove the plug from the transmission. 5.
Page 135: Implement Relief Pressure Test (Using Pressure Gauge) (Machine Serial Numbers Below 316000000)
Implement Relief Pressure Test (Using Pressure Gauge) (Machine Serial Numbers below 316000000) g230803 Figure 61 Pipe plug Seat base opening Check valve Implement relief valve g230804 Figure 62 Relief valve The implement relief pressure test should be done if a problem is suspected with the implement relief valve.
Page 136 Implement Relief Pressure Test (Using Pressure Gauge) (Machine Serial Numbers below 316000000) (continued) Note: If the implement relief pressure is 4,820 to 6,900 kPa (700 to 1,000 psi) and a steering or lift problem occurs, inspect for a problem unrelated to the hydraulic circuit (e.g., binding steering or lift system components, debris build-up on/under the cutting deck).
Page 137: Lift Cylinder Internal Leakage Test (Machine Serial Numbers Below 316000000)
Lift Cylinder Internal Leakage Test (Machine Serial Numbers below 316000000) g230805 Figure 63 Test Procedure The lift cylinder internal leakage test should be performed if a cutting deck (or implement) raise and lower problem is identified. This test will determine if the lift cylinders are damaged.
Page 138 Test Procedure (continued) 2. With the engine running, raise the cutting deck (or implement) completely. Using blocking or a hoist, support the cutting deck (or implement) to keep it in the fully raised position. Shut off the engine. 3. Place a drain pan under the lift cylinder that is to be tested for internal leakage.
Page 139: Steering Cylinder Internal Leakage Test (Machine Serial Numbers Below 316000000)
Steering Cylinder Internal Leakage Test (Machine Serial Numbers below 316000000) g230807 Figure 65 Test Procedure The steering cylinder internal leakage test should be performed if a steering problem is identified. This test will determine if the steering cylinder is damaged. Note: Steering circuit operation will be affected by rear tire pressure, steering cylinder binding, extra weight on the vehicle, and/or binding of rear axle steering components.
Page 140 Test Procedure (continued) 6. With the engine shut off, continue turning the steering wheel for a right turn (clockwise) with the steering cylinder fully extended. Observe the open fitting on the steering cylinder as the wheel is turned. If fluid comes out of the fitting while turning the steering wheel to the right, the steering cylinder has internal leakage and must be repaired or replaced.
Page 141: Charge Pump Flow Test (Using Tester With Pressure Gauges And Flow Meter) (Machine Serial Numbers Below 316000000)
Charge Pump Flow Test (Using Tester With Pressure Gauges and Flow Meter) (Machine Serial Numbers below 316000000) The charge pump flow test should be performed if a hydraulic problem is identified that affects both the steering and lift circuits. Note: The charge pump provides make-up fluid for internal hydrostat components before flow is available for the steering and lift circuits.
Page 142 Charge Pump Flow Test (Using Tester With Pressure Gauges and Flow Meter) (Machine Serial Numbers below 316000000) (continued) 6. Ensure that the flow control valve on the tester is fully open. Also, ensure that the traction pedal and lift valve are in neutral and that the parking brake is engaged.
Page 143: Testing The Traction Circuit-Charge Pressure (Machine Serial Numbers Above 316000000)
Testing the Traction Circuit–Charge Pressure (Machine Serial Numbers above 316000000) g224775 Figure 67 Test Procedure The charge pressure test is the first in a series of tests recommended to determine traction circuit performance. A charge pressure drop of more than 20% indicates an internal leak in the hydraulic pump.
Page 144 Test Procedure (continued) 3. Read all Warning, Cautions, and precautions listed at the beginning of this section. 4. Raise and support the operator seat, remove the seat plate to get access to the hydraulic pump assembly. 5. Ensure that the traction pedal is in the N position, the steering wheel EUTRAL is stationary and parking brake is set.
Page 145 Test Procedure (continued) 12. Record the reading on the pressure gauge (under load). The charge pressure (under load) should not drop more than 20% when compared to charge pressure (without load) recorded in step 10. If specifications are not met, perform the hydraulic pump flow and traction relief pressure test;...
Page 146: Testing The Traction Circuit-Hydraulic Pump Flow And Relief Pressure (Machine Serial Numbers Above 316000000)
Testing the Traction Circuit–Hydraulic Pump Flow and Relief Pressure (Machine Serial Numbers above 316000000) g224776 Figure 69 The hydraulic pump flow test is the second in a series of tests recommended to determine the traction circuit performance. This test compares fluid flow at No Load with fluid flow Under Load.
Page 147 Test Procedure (continued) CAUTION Before opening the hydraulic system, operate all the hydraulic controls to release system pressure and avoid injury from the pressurized hydraulic fluid; refer to Releasing Pressure from the Hydraulic System (page 5–6). 2. Park the machine on a level surface, lower the cutting deck, shut off the engine, and set the parking brake.
Page 148 Test Procedure (continued) 9. Use the hydraulic hose kit to connect tester to the machine; refer to Hydraulic Hose Kit (page 5–40). Ensure that the fitting and hose connections are properly tightened. Also, ensure that the flow control valve on tester is fully open.
Page 149 Test Procedure (continued) 18. Install the seat plate, lower and secure the operator seat. 19. Start the engine, check for hydraulic-fluid leaks, repair any leaks as required, and fill the hydraulic reservoir (front axle) with the correct quantity of new hydraulic fluid before returning the machine to service.
Page 150: Testing The Steering Circuit-Steering Control Valve, Relief Valve Pressure, And Steering Cylinder (Machine Serial Numbers Above 316000000)
Testing the Steering Circuit–Steering Control Valve, Relief Valve Pressure, and Steering Cylinder (Machine Serial Numbers above 316000000) g224913 Figure 71 Unit steering performance will be affected by incorrect rear tire pressure, binding in the hydraulic steering cylinder, extra weight on the vehicle, and/or binding of the steering forks.
Page 151 Test Procedure (continued) A. There should be no shaking or vibration in the steering wheel or rear wheels. B. The steering wheel movements should be followed immediately by a corresponding rear wheel movement without the steering wheel continuing to turn. 3.
Page 152 Test Procedure (continued) 6. If the specification is not met, repair or replace the steering control valve; refer to Servicing the Steering Control Valve (page 5–116). 7. After you complete the testing, shut off the engine, and then release hydraulic system pressure;...
Page 153: Testing The Steering Circuit-Charge Pump Flow (Machine Serial Numbers Above 316000000)
Testing the Steering Circuit–Charge Pump Flow (Machine Serial Numbers above 316000000) g226658 Figure 72 The charge pump is designed to satisfy the steering cylinder needs (at full speed). The charge pump flow test compares fluid flow at No Load with fluid flow Under Load.
Page 154 Test Procedure (continued) 3. Raise and support the operator seat, remove the seat plate to get access to the hydraulic pump assembly. 4. Clean the junction of the hydraulic tube and left side elbow fitting on the charge pump. Disconnect the hydraulic tube from the left side of the pump fitting.
Page 155 Test Procedure (continued) B. The charge pump is worn and should be repaired or replaced; refer Servicing the Hydraulic Pump (Machine Serial Number above 316000000) (page 5–103). 14. After you complete the testing, shut off the engine, and then release pressure from the hydraulic system;...
Page 156: Testing The Lift Circuit-Lift Cylinder Internal Leakage (Machine Serial Numbers Above 316000000)
Testing the Lift Circuit–Lift Cylinder Internal Leakage (Machine Serial Numbers above 316000000) g225190 Figure 73 Perform a lift cylinder internal leakage test if you identify a cutting deck raise and lower problem. This test determines if the lift cylinder being tested is damaged. The lift cylinders must be tested individually.
Page 157 Test Procedure Note: When performing the lift cylinder internal leakage test, the cutting deck should be attached to the lift arms. g225791 Figure 74 Cylinder barrel end fitting Hydraulic hose Hydraulic hose Lift cylinder 1. Park the machine on a level surface with the PTO switch off, shut off the engine, and set the parking brake.
Page 158 Test Procedure (continued) 11. Remove the cap from the cylinder fitting and the plug from the hydraulic hose. 12. Connect the hydraulic hose to the lift cylinder fitting. 13. Carefully remove the jack from under the lift arm. Start the engine and operate the lift cylinders through several up and down cycles.
Page 159: Adjustments
Adjustments Traction Pedal Friction Wheel (Machine Serial Number below 316000000) g230809 Figure 75 Traction pedal Friction wheel Inspection point The traction pedal friction wheel is designed to reduce transmission oscillation caused by rapid back and forth foot movements against the traction pedal. This is most noticeable when operating over bumpy terrain.
Page 160 Adjusting the Traction Pedal Friction Wheel (continued) 2. Rotate the shaft to move the worn friction wheel section away from the traction pedal. 3. Tighten the flange nuts to secure traction pedal shaft and friction wheel in position. Hydraulic System: Adjustments Page 5–76 Groundsmaster ®...
Page 161: Service And Repairs
Service and Repairs General Precautions for Removing and Installing the Hydraulic System Components Before Repairing or Replacing the Components 1. Before removing any parts from the hydraulic system, park the machine on a level surface, lower the cutting deck, shut off the engine, set the parking brake, and remove the key from the key switch.
Page 162: Checking The Hydraulic Lines And Hoses
After Repairing or Replacing the Components (continued) 4. Remove all the caps or plugs from the hydraulic tubes, hydraulic fittings, and components before connecting them again. 5. Use proper tightening procedures when installing the hydraulic hoses and fittings; refer to Installing the Hydraulic Hose and Tube (O-Ring Face Seal Fitting) (page 5–9) Installing the Hydraulic Fittings (SAE Straight Thread...
Page 163: Priming The Hydraulic Pump
Priming the Hydraulic Pump When the hydraulic system is flushed, the hydraulic system is charged, or the hydraulic components are installed, it is important to properly prime the hydraulic pumps. The hydraulic pump priming ensures that the hydraulic pump have sufficient fluid during initial start-up and running.
Page 164: Flushing The Hydraulic System
Flushing the Hydraulic System IMPORTANT Flush the hydraulic system whenever there is a severe component failure or the system is contaminated (for example, the fluid appears milky, black, or contains metal particles). IMPORTANT If a component failure occurs in the traction circuit; refer to the Traction Circuit Component Failure (page 5–7) for information regarding the importance of removing contamination from the...
Page 165 Priming the Hydraulic Pump (page 5–79). 10. Connect the fuel stop solenoid (Groundsmaster 3280-D) or spark plug wires (Groundsmaster 3320) to allow the engine to start. 11. Start the engine and operate it at low-idle speed for a minimum of 2 minutes.
Page 166: Filtering The Closed-Loop Traction Circuit (Machine Serial Number Above 316000000)
To effectively remove the contamination from the closed-loop traction circuit, use the Toro high flow hydraulic filter and hydraulic hose kits (refer to Special Tools (page 5–39)).
Page 167 5 more minutes. IMPORTANT If you are using a filter that is not the Toro high flow filter that is bi-directional, do not press the traction pedal in the reverse direction. If the flow is reversed when using a filter that is not bi-directional, unwanted material from the filter will again enter the traction circuit.
Page 168 Filtering the Closed-Loop Traction Circuit (Machine Serial Number above 316000000) (continued) 11. Remove the high flow hydraulic filter and hydraulic hose kit from the machine. Connect the hydraulic hose to the left pump fitting. Ensure that you properly tighten the hoses; refer to Installing the Hydraulic Hose and Tube (O-Ring Face Seal Fitting) (page 5–9).
Page 169: Charging The Hydraulic System
7. Prime the hydraulic pump; refer to Priming the Hydraulic Pump (page 5–79). 8. Connect the fuel stop solenoid (Groundsmaster 3280-D) or spark plug wires (Groundsmaster 3320) to allow the engine to start. 9. Ensure that the traction pedal is in the N...
Page 170 Charging the Hydraulic System (continued) 13. Turn the steering wheel in both directions so that the steering cylinders move in and out several times. 14. Operate the traction pedal in the forward and reverse directions. The drive wheels should rotate in the proper direction. If the wheels rotate in the wrong direction, shut off the engine, inspect the hydraulic line placement at the hydraulic pump and hydraulic motor.
Page 171: Transmission Driveshaft (Machine Serial Numbers Below 316000000)
Transmission Driveshaft (Machine Serial Numbers below 316000000) g230811 Figure 79 Driveshaft Bolt Transmission Conelock nut Square-head screw (2 each) Bolt Flat washer Coupling spacer Lock washer Rubber coupling Pump hub Coupling spacer Bolt Removing the Transmission Driveshaft 1. Park the machine on a level surface, engage parking brake, lower cutting deck (or implement), and shut off the engine.
Page 172 Aligning the Transmission Driveshaft The engine crankshaft and the transmission input shaft must be aligned within 3 mm (0.125 inch) of each other. 1. Verify that the driveshaft is straight and that the flanges are perpendicular to the tube and are not bent. 2.
Page 173 Aligning the Transmission Driveshaft (continued) 7. When driveshaft alignment is correct, tighten fasteners to secure front axle to frame. IMPORTANT Do not overtighten jam nut for transmission anchor as driveshaft alignment will be affected. 8. Tighten upper jam nut (item 8 in Figure 80) until it contacts top of transmission anchor and then tighten locknut below transmission anchor.
Page 174: Hydrostatic Transmission (Machine Serial Numbers Below 316000000)
Hydrostatic Transmission (Machine Serial Numbers below 316000000) g230835 Figure 81 Bolt Pump lever Adapter Bolt (3 each) Cotter pin Plug Lock washer (4 each) Flat washer O-ring Flat washer Rubber bushing Filter adapter Spacer Hydraulic tee fitting Jam nut Mounting spacer (4 each) Hydraulic hose Hydraulic filter Pinion gear...
Page 175 Removing the Hydrostatic Transmission 1. Park the machine on a level surface, engage parking brake, lower cutting deck (or implement), and shut off the engine. Remove key from the key switch. 2. To prevent contamination of the hydraulic system, clean transmission and front axle.
Page 176 Installing the Hydrostatic Transmission 1. Coat new hydraulic fitting O-rings lightly with clean hydraulic fluid. Install fittings with new O-rings to the transmission. Orientate the fittings as noted during disassembly. 2. If pump lever (item 18 in Figure 81) was removed, clean pump shaft and apply Loctite #680 Retaining Compound (or equivalent) to pump shaft.
Page 177: Servicing The Hydrostatic Transmission (Machine Serial Numbers Below 316000000)
Servicing the Hydrostatic Transmission (Machine Serial Numbers below 316000000) g230836 Figure 82 Retaining ring Piston (pump) (9 each per block) Center section Trunnion shaft O-ring Pipe plug (4 each) Flat washer Check valve O-ring Roller bearing Plug Threaded plug Needle bearing O-ring Bolt (4 each) Transmission housing...
Page 178 Servicing the Hydrostatic Transmission (Machine Serial Numbers below 316000000) (continued) Note: For transmission repair information; refer to the Danfoss 15 Series Axial Piston Pumps, Motors and Transmission Repair Manual and Service Manual. Hydraulic System: Service and Repairs Page 5–94 Groundsmaster ®...
Page 179: Hydrostatic Transmission Neutral Arm Assembly (Machine Serial Number Below 316000000)
Hydrostatic Transmission Neutral Arm Assembly (Machine Serial Number below 316000000) g230837 Figure 83 Transmission housing Grease fitting Bearing Bolt Eccentric pin Socket-head screw (4 each) Mounting plate Retaining ring Socket-head screw Neutral return spring Jam nut Neutral proximity switch Neutral return arm Socket-head screw Trunnion cam Bushing...
Page 180 Assembling the Hydrostatic Transmission Neutral Arm Assembly 1. Assemble neutral arm components to hydrostatic transmission (Figure 83). If eccentric pin was removed, ensure that the mark on eccentric pin is orientated to top of transmission. Note fastener torque specifications. 2. Lubricate grease fitting on eccentric pin; refer to the Traction Unit Operator’s Manual.
Page 181: Hydraulic Pump Driveshaft (Machine Serial Number Above 316000000)
Hydraulic Pump Driveshaft (Machine Serial Number above 316000000) g224766 Figure 85 Hydraulic pump Flange-head screw (2 each) Flat washer (3 each) Flange nut (2 each) Locknut (2 each) Bolt (3 each) Flat washer (2 each) Driveshaft assembly Bolt (2 each) Pump bracket Kubota diesel engine Removing the Hydraulic Pump Driveshaft...
Page 182 Servicing the Driveshaft Cross and Bearing g224767 Figure 86 End yoke Shaft yoke Cross and bearing kit Grease fitting Snap ring (4 each) 1. Remove the snap rings that secure the bearings in the yokes. IMPORTANT Support the yokes when removing and installing the bearings to prevent damage.
Page 183 Installing the Hydraulic Pump Driveshaft (continued) 4. Slide the driveshaft end yoke on the pump input shaft so that the yoke is flush with end of the input shaft. Secure the driveshaft end yoke to the pump input shaft with the 2 bolts (item 11 in Figure 85) and 2 locknuts.
Page 184: Hydraulic Pump (Machine Serial Number Above 316000000)
Hydraulic Pump (Machine Serial Number above 316000000) g224765 Figure 87 Hydraulic tube O-ring (2 each) Hydraulic tube Hydraulic tube 90° hydraulic fitting (2 each) Hydraulic hose Flange-head screw (2 each) O-ring (2 each) Hydraulic pump Pump Bracket Hydraulic tube Flange nut (2 each) Flange-head screw (4 each) Suction hose Flat washer (2 each)
Page 185 Removing the Hydraulic Pump CAUTION Before opening the hydraulic system, operate all the hydraulic controls to release system pressure and avoid injury from the pressurized hydraulic fluid; refer to Releasing Pressure from the Hydraulic System (page 5–6). 1. Park the machine on a level surface, set the parking brake, lower the cutting deck (or implement), shut off the engine, and remove the key from the key switch.
Page 186 Installing the Hydraulic Pump (continued) IMPORTANT Ensure that you do not damage the machine components while installing the hydraulic pump. 2. Carefully lower the hydraulic pump into the machine. 3. Secure the hydraulic pump to the pump bracket with the 2 flange-head screws (item 3 in Figure 87), 2 washers, and 2 flange nuts.
Page 187: Servicing The Hydraulic Pump (Machine Serial Number Above 316000000)
Servicing the Hydraulic Pump (Machine Serial Number above 316000000) g224915 Figure 88 Groundsmaster ® 3280-D/3320 Page 5–103 Hydraulic System: Service and Repairs 05138SL Rev B...
Page 188 Servicing the Hydraulic Pump (Machine Serial Number above 316000000) (continued) Figure 88 (continued) Retaining ring (2 each) Needle bearing Relief cone valve O-ring (2 each) Swash plate Slotted pin Body (2 each) Thrust plate End cap Inner race (2 each) End cap gasket O-ring Seal lip...
Page 189: Traction Neutral Arm Assembly (Machine Serial Number Above 316000000)
Traction Neutral Arm Assembly (Machine Serial Number above 316000000) g225054 Figure 89 Flat washer (2 each) Sensor bracket Thrust washer Traction rod Carriage screw (2 each) Traction stud Neutral cam Hydraulic pump Locknut (2 each) Bolt Lock washer (2 each) Bearing spacer Traction neutral sensor Jam nut (2 each)
Page 190 Assembling the Traction Neutral Arm Assembly 1. Assemble the neutral arm components to the hydraulic pump (Figure 89). 2. Check and adjust the neutral position; refer to the Operator's Manual. 3. Check for correct operation of the neutral sensor and adjust if necessary; refer to the Traction Neutral Sensor (Machine Serial Number above 316000000) (page...
Page 191: Front Axle Drive Motor (Machine Serial Number Above 316000000)
Front Axle Drive Motor (Machine Serial Number above 316000000) g224764 Figure 90 Hydraulic tube Flange-head screw (6 each) Hardened washer Hydraulic tube Hydraulic motor Pump bracket Front axle O-ring (2 each) O-ring 90° hydraulic fitting (2 each) Snap ring (2 each) O-ring (2 each) Pinion gear Groundsmaster...
Page 192 Removing the Front Axle Drive Motor CAUTION Before opening the hydraulic system, operate all the hydraulic controls to release system pressure and avoid injury from the pressurized hydraulic fluid; refer to Releasing Pressure from the Hydraulic System (page 5–6). 1. Park the machine on a level surface, lower the cutting deck, shut off the engine, set the parking brake, and remove the key from the key switch.
Page 193: Servicing The Front Axle Drive Motor (Machine Serial Number Above 316000000)
Servicing the Front Axle Drive Motor (Machine Serial Number above 316000000) g224914 Figure 91 Retaining ring Thrust bearing Valve plate Spacer Splined driveshaft O-ring Washer Housing assembly Backplate assembly Retaining ring (2 each) Camplate insert Plug assembly Bearing race (2 each) Rotating kit assembly Bolt (6 each) Note: For the hydraulic motor repair procedures;...
Page 194: Lift Cylinder
Lift Cylinder g224916 Figure 92 3280-D Models 30344 and 30345 O-ring (2 each) Tee fitting Cotter pin (4 each) Straight hydraulic fitting Locknut (2 each) Lift cylinder (2 each) O-ring (7 each) Hydraulic hose Bolt (2 each) Hydraulic hose O-ring (2 each) Lift arm (left) Lift control valve Adapter (2 each)
Page 195 g230839 Figure 93 Lift cylinder Hose clamp Hydraulic tee fitting Bolt Hose stem Hydraulic hose O-ring Cotter pin Hydraulic tee fitting Hydraulic fitting Cylinder pin O-ring O-ring Hydraulic hose Test port Hydraulic hose Hydraulic hose Lift control valve Note: If the lift cylinder wear or damage occurs, the lift cylinder replacement is necessary.
Page 196 Removing the Lift Cylinder (continued) 7. Remove the locknut (item 8 in Figure 92) from the bolt that retains the lift cylinder to the frame. 8. Support the lift cylinder and slide the bolt (item 15 in Figure 92) from the lift cylinder and frame.
Page 197: Steering Control Valve
Steering Control Valve g223612 Figure 94 Steering wheel cover Compression spring Socket-head screw (4 each) Locknut Knob Flange nut (2 each) Flat washer Tilt steering lever Friction disc Steering wheel Grip Pivot plate Foam collar Steering control valve Friction disc Tower panel Spacer Tilt bracket...
Page 198 Removing the Steering Control Valve 1. Park the machine on a level surface, set the parking brake, lower the cutting deck (or implement), shut off the engine, and remove the key from the key switch. 2. Remove the knob (item 12 in Figure 94) from the end of the parking brake rod.
Page 199 Installing the Steering Control Valve 1. If the hydraulic fittings were removed from the steering control valve, lubricate new O-rings with clean hydraulic fluid, position the O-rings to the fittings, and install the fittings to the steering control valve; refer to Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fitting into the Component Port) (page...
Page 200: Servicing The Steering Control Valve
Servicing the Steering Control Valve g224771 Figure 96 Dust seal ring Spring set O-ring (3 each) Ball Housing Special screw (3 each) Ball stop Piston O-ring (5 each) Shaft seal Compression spring End cover Bearing assembly Adjusting spring with O-ring Gearwheel set Spool Plug...
Page 201: Steering Cylinder (2-Wheel Drive)
Steering Cylinder (2-Wheel Drive) g224773 Figure 97 Bolt O-ring (2 each) Flange nut (2 each) Spacer ring O-ring (2 each) Thrust washer Steering cylinder Straight hydraulic fitting Steering pivot plate 45° hydraulic fitting Bolt Rear axle Groundsmaster ® 3280-D/3320 Page 5–117 Hydraulic System: Service and Repairs 05138SL Rev B...
Page 202 Removing the Steering Cylinder (2-Wheel Drive) 1. Park the machine on a level surface, lower cutting deck (or implement), shut off the engine, set the parking brake, and remove the key from the key switch. 2. Read the General Precautions for Removing and Installing the Hydraulic System Components (page 5–77).
Page 203 Installing the Steering Cylinder (2-Wheel Drive) 1. If the hydraulic fittings were removed from the steering cylinder, lubricate new O-rings with clean hydraulic fluid, position the O-rings to the fittings, and install the fittings to the steering cylinder ports; refer to Installing the Hydraulic Fittings (SAE Straight Thread O-Ring Fitting into the Component Port) (page...
Page 204: Servicing The Steering Cylinder (2-Wheel Drive)
Servicing the Steering Cylinder (2-Wheel Drive) g225169 Figure 99 Barrel Internal collar BS seal BP seal Shaft Back-up washer Piston Dust seal O-ring O-ring Head Locknut Disassembling the Steering Cylinder (2-Wheel Drive) 1. Slowly pump the cylinder shaft to remove the hydraulic fluid from the steering cylinder into a drain pan.
Page 205 Disassembling the Steering Cylinder (2-Wheel Drive) (continued) IMPORTANT Clamping the vise jaws against the shaft surface could damage the shaft. When securing the shaft in a vise, protect the shaft surface. 5. Mount the shaft in a vise. Remove the locknut and piston from the shaft. Carefully slide the head and internal collar off the shaft.
Page 206 Assembling the Steering Cylinder (2-Wheel Drive) (continued) Note: Do not damage the seals during installation. 7. Coat all the internal cylinder components with clean hydraulic fluid. Slide the shaft assembly into the barrel. 8. Use a spanner wrench, secure the internal collar in the barrel. Hydraulic System: Service and Repairs Page 5–122 Groundsmaster...
Page 207: Steering Cylinder (4-Wheel Drive)
Steering Cylinder (4-Wheel Drive) g225055 Figure 100 Thrust washer Retaining ring (2 each) 90° hydraulic fitting Jam nut Grease fitting 45° lube fitting Rear axle pin 45° hydraulic fitting Steering cylinder support bracket Hydraulic hose 90° grease fitting Bolt (4 each) Washer-head screw Hydraulic hose Washer (4 each)
Page 208 Removing the Steering Cylinder (4-Wheel Drive) (continued) CAUTION Before opening the hydraulic system, operate all the hydraulic controls to release system pressure and avoid injury from the pressurized hydraulic fluid; refer to Releasing Pressure from the Hydraulic System (page 5–6). 3.
Page 209: Servicing The Steering Cylinder (4-Wheel Drive)
Servicing the Steering Cylinder (4-Wheel Drive) g225059 Figure 101 Barrel Head O-ring Locknut Internal collar Rod seal Piston Dust seal O-ring Shaft Back-up washer U-ring Disassembling the Steering Cylinder (4-Wheel Drive) 1. Slowly pump the cylinder shaft to remove the hydraulic fluid from the steering cylinder into a drain pan.
Page 210 Disassembling the Steering Cylinder (4-Wheel Drive) (continued) 5. Mount the shaft in a vise. Remove the locknut and piston from the shaft. Carefully slide the head and internal collar off the shaft. 6. Remove and discard the U-ring (item 12 in Figure 101) and O-ring from the piston.
Page 211: Lift Control Valve (Machine Serial Numbers Below 316000000)
Lift Control Valve (Machine Serial Numbers below 316000000) g230840 Figure 102 Lift control valve Hydraulic hose Spacer O-ring Flat washer (2 each) Bolt Hydraulic adapter Bolt (2 each) Knob O-ring Lock washer (2 each) Link tube Hydraulic hose Hydraulic hose Hydraulic hose Cotter pin Check valve...
Page 212 g230841 Figure 103 Lift control valve Counterbalance manifold Lock washer (2 each) Hydraulic adapter Hydraulic fitting Flat washer (2 each) Hydraulic tube Bolt (2 each) Note: Early machines came fitted with a lift control valve that incorporated the counterbalance valve (Figure 102).
Page 213 Installing the Lift Control Valve 1. Coat new O-rings lightly with clean hydraulic fluid. Install all removed hydraulic fittings with new O-rings to the lift control valve. 2. Position lift control valve to machine frame. Secure control valve to machine with 2 bolts (item 11 in Figure 102), 2 lock washers, and 2 flat washers.
Page 214: Servicing The Lift Control Valve (Machine Serial Numbers Below 311000000)
Servicing the Lift Control Valve (Machine Serial Numbers below 311000000) g230842 Figure 104 Detent ball Poppet stop Detent plunger Spring Poppet Spring End cap Gasket O-ring O-ring Spacer Lockout seat (black) Adapter plug Screw O-ring Washer O-ring O-ring Detent plug Screw and lock washer (2 each) Lockout seat (silver) Spool...
Page 215 Disassembly the Lift Control Valve (continued) 5. Carefully remove O-rings (item 4 in Figure 104) from spool bore. Take care not to damage spool bore or O-ring cavities during O-ring removal. 6. Remove detent plug (item 16 in Figure 104), O-ring, spring, and detent ball. 7.
Page 216 Assembling the Lift Control Valve (continued) CAUTION Use eye protection such as goggles when using compressed air. 1. Clean all control valve components with clean solvent and blow dry with compressed air. 2. Replace all removed O-rings. Lightly lubricate new O-rings with clean hydraulic fluid before assembly.
Page 217: Counterbalance Valve Manifold (Machine Serial Numbers Below 311000000) (If Equipped)
Counterbalance Valve Manifold (Machine Serial Numbers below 311000000) (If Equipped) g230845 Figure 106 Lift control valve O-Ring Hydraulic hose Hydraulic adapter Counterbalance manifold Flange nut (2 each) Hydraulic tube Bolt (2 each) Mounting bracket O-Ring Hydraulic hose Removing the Counterbalance Valve Manifold 1.
Page 218 Servicing the Manifold g230846 Figure 107 Manifold Check valve Counterbalance valve Plug 1. Ensure that the manifold is cleaned before removing either of the valves. IMPORTANT Use care when handling the hydraulic valve. Slight bending or distortion of the stem tube can cause binding and malfunction. 2.
Page 219 Servicing the Manifold (continued) 5. Lubricate new valve seal kit components with clean hydraulic fluid and install on valves. The O-rings, sealing rings, and backup rings must be arranged properly on the valves for proper operation and sealing. 6. Thread valves carefully into correct manifold port. The valves should go in easily without binding.
Page 220: Lift Control Valve (Machine Serial Number Above 311000000)
Lift Control Valve (Machine Serial Number above 311000000) g225057 Figure 108 Lift control valve Flat washer (2 each) Hydraulic hose O-ring (4 each) Lock washer (2 each) Hydraulic hose Hydraulic tube Bolt (2 each) Hydraulic tube Note: For testing the solenoid valve coils; refer to Lift Control Valve Solenoid Valve Coil (Machine Serial Number above 311000000) (page 6–62).
Page 221 Removing the Lift Control Valve (continued) CAUTION Before opening the hydraulic system, operate all the hydraulic controls to release system pressure and avoid injury from the pressurized hydraulic fluid; refer to Releasing Pressure from the Hydraulic System (page 5–6). WARNING Ensure that the cutting deck is fully lowered and supported before loosening the hydraulic lines, cartridge valves, or plugs from the lift control valve.
Page 222 Removing the Lift Control Valve (continued) IMPORTANT A flow control orifice (item 5 in Figure 109) is placed below the hydraulic fitting on the lift control valve. If the fitting is removed from the manifold and a flow control orifice is in the manifold block, ensure that you remove the orifice and label its position for assembly purposes.
Page 223: Servicing The Lift Control Valve (Machine Serial Number Above 311000000)
Servicing the Lift Control Valve (Machine Serial Number above 311000000) g225058 Figure 110 Expander plug Nut (2 each) Check valve Coil O-ring Solenoid valve (SV1) Logic valve 90° elbow fitting Solenoid valve (SV2) Dust cap Manifold block Solenoid coil Note: The ports on the lift control valve are marked for easy identification of the components.
Page 224 WARNING Ensure that the cutting deck is fully lowered and supported before loosening the hydraulic lines, cartridge valves, or plugs from the lift control valve. If the deck is not fully lowered as the lift control valve components are loosened, the deck may drop unexpectedly. Servicing the Control Manifold Cartridge Valve WARNING Before opening the hydraulic system, operate all the hydraulic...
Page 225 Servicing the Control Manifold Cartridge Valve (continued) CAUTION Sudden movement of the internal valve spools can release the stored fluid suddenly. 6. Use clean-mineral spirits and clean the cartridge valve. Put the valve in the clean-mineral spirits to flush out contamination. IMPORTANT Particles as fine as talcum powder can affect the operation of high-pressure hydraulic valves.
Page 226: Oil Cooler (Groundsmaster 3280-D)
Oil Cooler (Groundsmaster 3280-D) g221637 Figure 111 Swell latch (2 each) Radiator cap Flange-head screw Lock washer (6 each) (4 each) Flange nut (6 each) Hose clamp (3 each) Pop rivet (4 each) Hex nut (6 each) Flange nut (4 each)
Page 227 Inspecting the Oil Cooler 1. Back flush the oil cooler with cleaning solvent. After cleaning the cooler, ensure that all the solvent is drained from the cooler WARNING Use eye protection such as goggles when using compressed air to dry the oil cooler. 2.
Page 228 Hydraulic System: Service and Repairs Page 5–144 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 229 Electrical System Quick Checks ......................6–15 Testing the Battery (Open Circuit Test) ..................... 6–15 Testing the Charging System ......................6–15 Testing the Glow Plug System (Groundsmaster 3280-D) ..............6–16 Checking the Operation of the Interlock Switches ................6–16 Adjustments............................6–17 Traction Neutral Sensor (Machine Serial Number above 316000000) ..........
Page 230: Chapter 6: Electrical System
Lift Control Valve Solenoid Valve Coils (Machine Serial Number above 311000000) ......6–76 PTO Electric Clutch.......................... 6–78 Battery Storage ..........................6–80 Battery Care............................. 6–80 Servicing the Battery ........................6–81 Electrical System: Service and Repairs Page 6–2 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 231: General Information
Figure 112 Fuse block Standard Control Module (SCM) The Groundsmaster 3280-D and Groundsmaster 3320 machines is equipped with a Standard Control Module (SCM) to monitor and control the electrical components required for safe operation. The SCM is located under the control...
Page 232 The high-temperature warning input LED should be illuminated when the high-temperature warning switch closes due to engine coolant temperature of approximately 105°C (220°F). The backlap input LED is not used on the Groundsmaster 3280-D or 3320 machine. SCM Outputs g227291...
Page 233: Standard Control Module Logic Chart
SCM Outputs (continued) The PTO output LED should be illuminated when the key switch is in the O position and the PTO switch is O (pulled out). Note: If the SCM high-temperature warning input LED is illuminated, the PTO output LED does not illuminate, and the PTO disengages regardless of the PTO switch position.
Page 234 Standard Control Module Logic Chart (continued) g226938 Figure 114 Electrical System: General Information Page 6–6 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 235: Special Tools
Special Tools You can order these special tools from your Authorized Toro Distributor. Some tools are also available from a local supplier. Multimeter The meter can test the electrical components and circuits for current, resistance, or voltage. You can get the digital multimeter locally.
Page 236: Dielectric Gel
Dielectric Gel Toro Part No. 107-0342 Use the dielectric gel to prevent corrosion of unsealed connection terminals. To ensure complete coating of the terminals, liberally apply the gel to the component and wire harness connector, plug the connector into the component, unplug the connector, apply the gel to both surfaces again, and connect the harness connector to the component again.
Page 237: Troubleshooting
If the machine has any interlock switches that are bypassed, connect the switches for the correct troubleshooting and safety. Note: Use the Standard Control Module input and output LED's when troubleshooting an electrical problem of the Groundsmaster 3280-D or 3320 machine. Groundsmaster ®...
Page 238 • The engine and/or fuel can be too cold. • The engine fuel pump or circuit wiring is damaged. • The glow plugs are damaged (Groundsmaster 3280-D). • The engine glow plug circuit does not operate properly. • The engine or fuel system is malfunctioning; refer to Chapter 3: Gasoline Engine (page 3–1)
Page 239 Starting Problems (continued) The engine cranks, but should not, when the PTO switch is • The PTO switch or circuit wiring is damaged. in the O (up) position. • The Standard Control Module is damaged. The engine starts, but stops when the key switch is released •...
Page 240 General Run and Transport Problems Problem Possible Causes The engine continues to run, but should not, when the key • The battery is discharged. switch is turned to the O position. • The battery cables are loose or corroded. • The fuse F1-1 (15 A) to the key switch is damaged; refer Fuses (Machine Serial Number below 400000000) (page 6–22) Fuses (Machine Serial Number above 400000000)
Page 241 General Run and Transport Problems (continued) Problem Possible Causes The engine shuts off during the operation (the operator sitting • The operator is not in the center of the seat (the seat switch on the seat). is not pressed). • The engine temperature is excessive (above 115°C /240°F). •...
Page 242 Cutting Deck Operating Problems Problem Possible Causes The cutting deck remains engaged, but should not, with no • The seat switch or circuit wiring is damaged. operator in the seat. • A loose, corroded, or broken wire(s) exist in the PTO clutch circuit;...
Page 243: Electrical System Quick Checks
Electrical System Quick Checks Testing the Battery (Open Circuit Test) Use a multimeter to measure the voltage between the battery terminals; refer to Battery Test Table (page 6–15). Set the multimeter to the DC volts settings. The battery must be at a temperature of 16°C to 38°C (60°F to 100°F).
Page 244: Testing The Glow Plug System (Groundsmaster 3280-D)
This is a fast, simple test that helps to determine the integrity and operation of the Groundsmaster 3280-D glow plug system. Perform this test when you find hard starting (cold engine) on a diesel engine equipped with a glow plug system.
Page 245: Adjustments
Adjustments Traction Neutral Sensor (Machine Serial Number above 316000000) g226812 Figure 115 Traction neutral sensor Neutral arm Lock washer (2 each) Sensor bracket Jam nut (2 each) The traction neutral sensor is a normally open proximity sensor that closes when the traction pedal is in the neutral position.
Page 246 Adjusting the Traction Neutral Sensor (continued) 3. If the gap is incorrect, adjust the traction neutral sensor; refer to Adjusting the Proximity Sensor in the Traction Unit Operator’s Manual. 4. Check that the LED on the cable end of the traction neutral sensor is illuminated when the traction pedal is in the neutral position.
Page 247: Parking Brake Switch
Parking Brake Switch g227534 Figure 117 Steering tower cover Phillips-head screw (2 each) Parking brake knob Phillips-head screw (6 each) The switch used for the parking brake is a normally open switch. The switch closes when the parking brake is disengaged. The parking brake switch is located under the steering tower cover (Figure 117).
Page 248: Testing The Electrical Components
Testing the Electrical Components For accurate resistance and/or continuity checks, electrically disconnect the component being tested from the circuit (e.g., unplug the key switch connector before doing a continuity check of the switch). Note: Electrical troubleshooting of any 12 Volt power connection can be performed through voltage drop tests without disconnecting the component.
Page 249 Figure 120 The Groundsmaster 3280-D and 3320 machines use 3 fusible links for the circuit protection. These fusible links are located in a harness that connects the starter B+ terminal to the wire harness (Figure 119 Figure 120). If any of these links fail, current to the protected circuit stops;...
Page 250: Fuses (Machine Serial Number Below 400000000)
Fuses (Machine Serial Number below 400000000) g230995 Figure 121 Fuse block The fuse block is located under the control panel (Figure 121). g230996 Figure 122 Identification and Function The fuses are held in the fuse block. Use Figure 122 to identify each individual fuse and its correct amperage.
Page 251: Fuses (Machine Serial Number Above 400000000)
Fuses (Machine Serial Number above 400000000) g225175 Figure 123 Fuse block Throttle control lever The fuse blocks are located under the control panel (Figure 123). Identification and Function g225176 Figure 124 The fuses are held in the fuse blocks. Use Figure 124 to identify each individual fuse and its correct amperage.
Page 252 Identification and Function (continued) F2-2 (20 A) (If equipped): Protects power supply to the optional accessory. F2-3 (20 A) (if equipped): Protects power supply to the optional accessory. F2-4 (20 A) (if equipped): Protects power supply to the optional accessory. Testing the Fuses 1.
Page 253: Operator Cab Fuses (Machines With Operator Cab)
Operator Cab Fuses (Machines with Operator Cab) g243422 Figure 125 Fuse blocks location g243782 Figure 126 10 A fuse 60 A maxi-fuse Battery The operator cab fuse blocks are located in the cab headliner (Figure 125). In addition to the cab fuses in the fuse blocks, there are 2 additional fuses included in the cab wire harness.
Page 254 Identification and Function g244181 Figure 127 Refer to Figure 127 to identify each individual fuse and its correct amperage. The fuses have the following functions. Fuse F1-1 (20 A): Protects the cab work light circuit. Fuse F1-2 (25 A): Protects the blower fan circuit. Fuse F1-3 (30 A): Protects the air conditioner compressor clutch circuit.
Page 255: Key Switch
Key Switch g226806 Figure 128 Control panel Key switch Thumb screw (4 each) g190999 Figure 129 The key switch (item 2 in Figure 128) is located on the control panel and has 3 positions: O , and S (Figure 129). TART The Standard Control Module (SCM) monitors the operation of the key switch.
Page 256 Testing the Key Switch (continued) 4. If the SCM determines that the key switch and circuit wiring are not functioning correctly, then test the key switch as follows: A. Remove the 4 thumb screws (item 3 in Figure 128) that secure the control panel to the fuel tank.
Page 257: Indicator Lights
Indicator Lights g226805 Figure 130 Charge indicator High temperature warning Glow plug indicator Engine oil pressure Charge Indicator Light The charge indicator light should come on when the key switch is in the O position with the engine not running. Also, it should illuminate with an improperly operating charging circuit while the engine is running.
Page 258 Glow Plug Indicator Light The glow plug light on Groundsmaster 3280-D machines should come on when the key switch is placed in the O position before placing the key switch in the position. The light should stay lit for approximately 6 seconds while the...
Page 259: Hour Meter
Hour Meter g225181 Figure 132 Hour meter The hour meter records and displays accumulated hours of engine operation (Figure 132). Testing the Hour Meter 1. Park the machine on a level surface, lower the cutting deck, set the parking brake, and shut off the engine. 2.
Page 260: Pto Switch
PTO Switch g226809 Figure 133 PTO switch Control panel Thumb screw (4 each) g227536 Figure 134 COM B terminal NC B terminal NO C terminal NO B terminal COM C terminal NC C terminal The PTO switch is located on the control panel (Figure 133).
Page 261 IMPORTANT During the operation of the machine, if the PTO shuts down and the console temperature warning light is illuminated because of excessive engine coolant temperature, avoid shutting off the engine. Under this condition, push the PTO knob down, slowly drive to a safe flat area, move the throttle lever to the S position, press the traction pedal, and set the parking brake.
Page 262: Deck Lift Switch (Machine Serial Numbers Above 311000000)
Deck Lift Switch (Machine Serial Numbers above 311000000) g225172 Figure 135 Deck lift switch Thumb screw (4 each) The deck lift/lower switch is used to raise and lower the cutting deck on later machines. The switch is located on the control panel (Figure 135).
Page 263 Testing the Deck Lift Switch (continued) g223017 Figure 136 5. The deck lift switch terminals are identified in Figure 136 and the circuitry of the switch is shown in the Circuit Logic Table (page 6–35). With the use of a multimeter (ohms setting), test the switch functions to determine if continuity exists between the various terminals for each switch position.
Page 264: Seat Switch
Seat Switch g190803 Figure 137 Seat Washer-head screw (2 each) Machine wire harness Seat switch The seat switch is normally open and closes when the operator is on the seat. If the traction system or PTO switch is engaged when the operator raises out of the seat, the engine shuts off.
Page 265 Testing the Seat Switch (continued) 8. Replace the seat switch if testing determines that the switch is damaged. 9. If the seat switch testing is correct and the circuit problem still exists, check the machine wire harness; refer to the Electrical Schematics and Wire Harness Drawings/Diagrams in Appendix A (page A–1).
Page 266: Windshield Washer/Wiper Switch (Machines With Operator Cab)
Windshield Washer/Wiper Switch (Machines with Operator Cab) g243779 Figure 138 Center roof switch installation view Switch panel Washer/wiper switch The windshield washer/wiper switch controls the operation of the windshield wiper and washer pump. The switch is located in the cab headliner (Figure 138).
Page 267 Testing the Windshield Washer/Wiper Switch (continued) Circuit Logic Table Switch Position Normal Circuits Other Circuits None None IPER ASHER 6. Replace the windshield wiper/washer switch if testing determines that the switch is damaged. 7. If the windshield wiper/washer switch testing is correct and a circuit problem still exists, check the wire harness;...
Page 268 Accessory Power Switch (Machines with Operator Cab) g243784 Figure 140 Switch panel Accessory power switch The accessory power switch controls the power supply to the accessory power outlet. The switch is located in the cab headliner (Figure 140). Testing the Accessory Power Switch 1.
Page 269 None NCREASE Note: The accessory power switch terminals 4, 5, and 6 are not used on the Groundsmaster 3280-D machines. 6. Replace the accessory power switch if testing determines that the switch is damaged. 7. If the accessory power switch testing is correct and a circuit problem still exists, check the wire harness;...
Page 270: Fan Speed Switch (Machines With Operator Cab)
Fan Speed Switch (Machines with Operator Cab) g243778 Figure 142 Cab headliner (air/heat panel) Fan speed switch The fan speed switch is located in the cab headliner (Figure 142). The switch is used to select the fan speed (off, low, medium, or high). Testing the Fan Speed Switch 1.
Page 271 Testing the Fan Speed Switch (continued) Circuit Logic Table Switch Position Closed Circuits B+C+L B+C+M EDIUM B+C+H 6. Replace the fan speed switch if testing determines that the switch is damaged. 7. If the fan speed switch testing is correct and a circuit problem still exists, check the wire harness;...
Page 272: Work Light Switch (Machines With Operator Cab-Optional)
Work Light Switch (Machines with Operator Cab–Optional) g243426 Figure 144 Work light switch (optional) 2. Beacon switch (optional) Cab headliner (lights switch panel) The switches are located in the cab headliner (Figure 144). The switches are used to turn the optional light kits on and off. Testing the Work Light Switch 1.
Page 273 Testing the Work Light Switch (continued) 7. If the switch testing is correct and a circuit problem still exists, check the wire harnesses; refer to the Electrical Schematics and Wire Harness Drawings and Diagrams in Appendix A (page A–1). 8. After you complete the testing, connect the machine wire harness connector to the switch and install the lights switch panel.
Page 274: Traction Neutral Switch (Machine Serial Numbers Below 316000000)
Traction Neutral Switch (Machine Serial Numbers below 316000000) g231017 Figure 146 Traction neutral switch Neutral return arm The traction neutral switch is a normally open proximity switch that closes when the traction pedal is in the neutral position. A socket-head screw threaded into the hydrostat neutral return arm acts as the sensing plate for the switch (Figure 146).
Page 275 Adjusting the Traction Neutral Switch (continued) g230994 Figure 147 Traction neutral switch Socket-head screw Neutral return arm 3. Rotate socket-head screw so that the clearance between end of the socket-head screw and neutral switch is 3.2 mm (0.125 inch) (Figure 147).
Page 276: Traction Neutral Sensor (Machine Serial Number Above 316000000)
Traction Neutral Sensor (Machine Serial Number above 316000000) g226812 Figure 148 Traction neutral sensor Neutral arm Lock washer (2 each) Sensor bracket Jam nut (2 each) The traction neutral sensor is a normally open proximity switch that closes when the traction pedal is in the neutral position. The sensor is located under the seat and mounts to a sensor bracket over the hydraulic pump (Figure 148).
Page 277 Testing the Traction Neutral Sensor (continued) 9. If the traction neutral sensor LED did not function correctly, do the following: A. Ensure that the traction neutral sensor is correctly adjusted; refer to adjusting the traction neutral sensor. B. Ensure that the key switch is in the O position and disconnect the traction neutral sensor connector from the machine wire harness.
Page 278 Parking Brake Switch g227534 Figure 149 Steering tower cover Phillips-head screw (2 each) Parking brake knob Phillips-head screw (6 each) g226808 Figure 150 Parking brake switch Connector The switch used for the parking brake is a normally open switch. The switch closes when the parking brake is not set.
Page 279 Testing the Parking Brake Switch (continued) 3. If the SCM verifies that the sensor and circuit wiring are functioning correctly, then no more switch testing is necessary. 4. If the SCM determines that the parking brake switch and circuit wiring are not functioning correctly, proceed with the test.
Page 280: High Temperature Warning Switch
High Temperature Warning Switch g227147 Figure 151 High temperature warning switch (diesel engine) g230991 Figure 152 High temperature warning switch (gasoline engine) The high temperature warning switch (Figure 151 Figure 152) is attached to the water pump housing on the engine and has a yellow wire attached to it. This switch is normally open and closes when the engine coolant temperature reaches approximately 105°C (220°F).
Page 281 Testing the High Temperature Warning Switch (continued) DANGER If the radiator or engine is hot, pressurized hot coolant can escape and cause burns. Do not open the radiator cap or drain the radiator when the coolant is hot. Ensure that the engine is cool before removing the high temperature warning switch from the engine.
Page 282 Testing the High Temperature Warning Switch (continued) 8. After you complete the testing, install the temperature switch to the engine housing, do the following steps: A. Clean the threads of the housing and switch. Apply thread sealant to the threads of the switch. B.
Page 283: High Temperature Shutdown Switch
High Temperature Shutdown Switch g226811 Figure 154 High temperature shutdown switch (diesel engine) g230992 Figure 155 High temperature shutdown switch (gasoline engine) The high temperature shutdown switch (Figure 154 Figure 155) is attached to the water pump housing on the engine and has a blue/white wire attached to it.
Page 284 The high-temperature shutdown switch is normally open. A. On the Groundsmaster 3280-D (diesel engine), the high temperature shutdown switch should close between 107° and 113°C (225° and 235°F). B. On the Groundsmaster 3320 (gasoline engine), the high temperature shutdown switch should close at approximately 114°C (238°F).
Page 285 Testing the High Temperature Shutdown Switch (continued) 9. After you complete the testing, install the temperature switch to the engine housing, do the following steps: A. Clean the threads of the housing and switch. Apply thread sealant to the threads of the switch. B.
Page 286: Engine Oil Pressure Switch
158). The oil pressure switch is a normally closed switch that opens with oil pressure. On the Groundsmaster 3280-D (diesel engine), the oil pressure switch should open at approximately 55 kPa (8 psi). On the Groundsmaster 3320 (gasoline engine), the oil pressure switch should open between 20 to 39 kPa (2.9 to 5.7 psi).
Page 287 IMPORTANT If the oil pressure indicator light is illuminated with the engine running, shut off the engine immediately. Check the indicator light, circuit wiring, pressure switch, and engine lubrication system to identify the cause of the illuminated indicator light. Testing the Engine Oil Pressure Switch Note: Refer to engine service manual for information regarding engine lubrication system and testing.
Page 288: Relays (Groundsmaster 3280-D)
Relays (Groundsmaster 3280-D) The Groundsmaster 3280-D machine uses 3 identical electrical relays that have 4 terminals. A tag near the wire harness relay connector can be used to identify each relay. g225179 Figure 159 Glow relay Fuel/water separator The glow relay used is attached to the support bracket inside the right side frame...
Page 289 g244180 Figure 161 Cab power relay Battery The cab power relay (on the machines with operator cab) is attached near the battery (Figure 161). The cab power relay is used to provide current to the operator cab electrical circuits. Testing the Relays 1.
Page 290 Testing the Relays (continued) g214499 Figure 162 5. Check the coil resistance between terminals the 85 and 86 with a multimeter (ohms setting). The resistance should be approximately 72 ohms (Figure 162). 6. Connect the multimeter (ohms setting) leads to relay terminals 30 and 87. The ground terminal 85 and apply +12 VDC to terminal 86.
Page 291: Lift Control Valve Solenoid Valve Coil (Machine Serial Number Above 311000000)
Lift Control Valve Solenoid Valve Coil (Machine Serial Number above 311000000) g227680 Figure 163 Lift control valve SV1 solenoid SV2 solenoid The hydraulic lift control valve is located on the right side of the machine, near the front right wheel (Figure 163).
Page 292 Testing the Lift Control Valve Solenoid Valve Coil (continued) 4. Use a multimeter (ohms setting), measure the resistance between the 2 connector terminals on the solenoid valve coil. The correct resistance for the solenoid coil is identified in the Solenoid Valve Coil Specifications Table (page 6–64).
Page 293: Pto Electric Clutch
PTO Electric Clutch An electric clutch is used to engage the PTO. The electric clutch is mounted on the engine crankshaft and engages when current is applied to the clutch. The clutch also incorporates a magnetic brake to stop clutch rotation when the clutch is de-energized.
Page 294: Fuel Stop Solenoid (Groundsmaster 3280-D)
Fuel Stop Solenoid (Groundsmaster 3280-D) g225174 Figure 166 Fuel stop solenoid The fuel stop solenoid used on the Groundsmaster 3280-D machine must be energized for the diesel engine to run. The solenoid is mounted to the injection pump on the engine (Figure 166).
Page 295 Testing the Fuel Stop Solenoid (In Place) (continued) 4. Use a digital multimeter, touch 1 test lead to the pull coil terminal and the other test lead to the fuel stop solenoid frame (ground) (Figure 167). The resistance of the pull coil should be less than 1 ohm (but not zero). 5.
Page 296: Glow Controller (Groundsmaster 3280-D)
Glow controller g227537 Figure 169 Top view Glow controller end view Slide view The glow controller used on the Groundsmaster 3280-D machine is located under the control panel (Figure 168). Note: Refer to the Electrical Schematics in Appendix A (page A–1) when troubleshooting the glow controller circuit.
Page 297 Controller Checks 1. Ensure that there is power from the battery. 2. Disconnect the electrical connector to the fuel stop solenoid to prevent the engine from starting. 3. Turn the key switch to the R position. Check the following while in the position: A.
Page 298: Fuel Pump (Groundsmaster 3280-D)
Fuel filter Fuel hose (to engine) Fuel pump Inlet fitting The fuel pump used on the Groundsmaster 3280-D (for Models 30344 and 30345) is attached to the support bracket inside the right side frame near the fuel/water separator (Figure 170). The fuel pump used on the Groundsmaster...
Page 299 DANGER Diesel fuel is highly flammable. • Use caution whenever you handle diesel fuel. • Do not smoke while testing the fuel pump. • Do not test the fuel pump while the engine is hot. • Ensure that there is adequate ventilation when testing. •...
Page 300 Testing the Fuel Pump Capacity (continued) Fuel Pump Specifications (except Models 30344 and 30345) Pump Capacity 0.7 L/minute (23.5 fl oz/minute) Pressure 22.8 kPa (3.3 psi) 0.9 A Maximum Current Draw 10. Lower the hood and secure it with the latches. Electrical System: Testing the Electrical Components Page 6–72 Groundsmaster...
Page 301: Fuel Pump (Groundsmaster 3320)
Fuel Pump (Groundsmaster 3320) g230998 Figure 172 Fuel hose (from tank) Fuel hose Fuel hose (to engine) Fuel filter Fuel pump The fuel pump used on the Groundsmaster 3320 (gasoline engine) is attached to the support bracket inside the right side frame near the fuel filter (Figure 172).
Page 302 Testing the Fuel Pump Capacity (continued) 6. The amount of fuel collected in the graduated cylinder should be approximately 400 ml (13.5 fl oz) after 30 seconds. 7. Replace fuel pump if necessary. Install fuel hose to carburetor inlet. Fuel Pump Specifications Pump Capacity 800 ml/minute (27 fl oz/minute) Pressure...
Page 303: Fuel Pump Relay (Groundsmaster 3320)
Fuel Pump Relay (Groundsmaster 3320) g223021 Figure 173 Normally open term Coil terminal Normally closed term Common terminal The Groundsmaster 3320 uses a relay to energize the fuel pump. The fuel pump relay is attached to the support bracket inside the right side frame near the fuel filter.
Page 304: Service And Repairs
Service and Repairs Note: Refer to the Kubota Workshop Manual: 05 Series Engine (Groundsmaster 3280-D) or the Briggs and Stratton/Daihatsu Engine Repair Manual (Groundsmaster 3320) for additional component repair information. Lift Control Valve Solenoid Valve Coils (Machine Serial Number above 311000000) g227288 Figure 174 Nut (2 each)
Page 305 Installing the Lift Control Valve Solenoid Valve Coils 1. Slide the coil assembly onto the hydraulic valve. 2. Install the nut onto the valve and torque the nut to 6.7 N∙m (5 in-lb). Note: Do not overtighten the nut. 3. Connect the machine wire harness connector to the solenoid coil. Groundsmaster ®...
Page 306 PTO Electric Clutch g227287 Figure 175 Kubota diesel engine Stub shaft PTO drive belt Flange nut (2 each) Electric clutch PTO shaft pulley Flange-head screw (2 Bolt Square key each) Clutch stop Spacer g230999 Figure 176 Bolt Stub shaft Square key Spacer Gasoline engine Clutch stop...
Page 307 Removing the PTO Electric Clutch (continued) 3. Remove the PTO belt from the clutch and PTO shaft pulley; refer to the Traction Unit Operator’s Manual. 4. Remove the clutch stop components (Figure 175 Figure 176). Note: Hold the coupler on the front of the engine to prevent crankshaft from turning when removing the bolt that secures the clutch to the stub shaft.
Page 308 Battery Storage If you store the machine for more than 30 days: 1. Ensure that the key switch is in the O position. Remove the battery and charge it fully; refer to Servicing the Battery (page 6–81). 2. Either store the battery on a shelf or on the machine. 3.
Page 309 (-) cable first. Clean the cable clamps and terminals separately. Connect the cables with the positive (+) cable first. Apply a layer of terminal protector (Toro Part No. 107-0392) or a light coat of petroleum jelly to the terminals to reduce corrosion after you make the connections.
Page 310 Removing and Installing the Battery g227290 Figure 177 Negative cable Battery retainer Bolt Battery base Flat washer Battery Threaded insert Lock washer Positive cable IMPORTANT Be careful when removing the battery cables and ensure that you do not damage the terminal posts or cable connectors. 1.
Page 311 Inspecting, Maintaining, and Testing the Battery 1. Do the following inspections and maintenance: A. Check for cracks. Replace the battery if cracked or leaking. B. Check the battery terminal posts for corrosion. Use the wire brush to clean corrosion from the posts. IMPORTANT Before cleaning the battery, tape or block the vent holes of the filler caps and ensure that the caps are tight.
Page 312 If the test voltage is below the minimum, replace the battery. If the test voltage is at or above the minimum, return the battery to service. 4. After you make the connections, apply terminal protector (Toro Part No. 107-0392) or a light layer of grease on all the battery posts and cable connectors to reduce corrosion.
Page 313 Charging the Battery To minimize damage to the battery and allow the battery to charge fully, do the following slow charging procedure. You can do this charging procedure with a constant current battery charger that is locally available. IMPORTANT Follow the manufacturer's instructions when using a battery charger. Note: Use specific gravity of the battery cells is the most accurate procedure of determining the battery condition.
Page 314 Charging the Battery (continued) CAUTION Charging a frozen battery can cause explosion and can cause personal injury. Let the battery warm to 15.5°C (60°F) before connecting to a charger. • Charge the battery in a well-ventilated place to dissipate the gases produced from the charging.
Page 315 Chapter 7 Chassis Table of Contents Specifications ............................7–2 General Information ..........................7–3 Service and Repairs ..........................7–4 Wheels ............................... 7–4 Steering Column ..........................7–6 Rear Frame and Axle Assembly......................7–9 Rear Axle (2-Wheel Drive) ....................... 7–11 Servicing the Rear Axle (2-Wheel Drive) ..................7–13 Rear Wheel Bearings (2-Wheel Drive) .....................
Page 316: Specifications
Specifications Item Description Front tire pressure (23 x 9.50 − 12, 4 ply, 138 kPa (20 psi) tubeless) Rear tire pressure ( 2-wheel drive machines) 138 kPa (20 psi) (16 x 6.50 − 8, 4 ply, tubeless) Rear tire pressure (4-wheel drive machines) 138 kPa (20 psi) (18 x 6.50−8, 4 ply, tubeless) Front wheel lug nut torque...
Page 317: General Information
General Information The Operator’s Manual provides information regarding the operation, general maintenance, and maintenance intervals for your Groundsmaster 3280-D and 3320 machines. Refer to the Operator’s Manual for additional information when servicing the machine. Groundsmaster ® 3280-D/3320 Page 7–3 Chassis: General Information...
Page 318: Service And Repairs
Service and Repairs Wheels g223611 Figure 178 Rear wheel hub Wheel-lug nut (5 each per wheel) Front axle Rear wheel assembly Front wheel assembly Rear axle (2-wheel drive) Removing the Wheel 1. Park the machine on a level surface, lower the cutting deck (or implement), shut off the engine, set the parking brake, and remove the key from the key switch.
Page 319 Removing the Wheel (continued) 4. Lift the machine with a jack until the wheel to be removed is off the ground. Support the machine with appropriate jack stands. 5. Remove the 5 wheel-lug nuts that attach the wheel to the machine, and remove the wheel.
Page 320: Steering Column
Steering Column g223612 Figure 179 Steering wheel cover Compression spring Socket-head screw (4 each) Locknut Knob Flange nut (2 each) Flat washer Tilt steering lever Friction disc Steering wheel Grip Pivot plate Foam collar Steering control valve Friction disc Tower panel Spacer Tilt bracket Flat washer...
Page 321 Removing the Steering Column 1. Park the machine on a level surface, set the parking brake, lower the cutting deck (or implement), shut off the engine, and remove the key from the key switch. 2. Carefully remove the steering wheel cover (item 1 in Figure 179) from the steering wheel.
Page 322 Installing the Steering Column (continued) 8. Position the tower panel to the machine and secure the panel with the 6 phillips-head screws. 9. Install the knob on the end of the parking brake rod. 10. Slide the foam collar onto the steering column. 11.
Page 323: Rear Frame And Axle Assembly
Rear Frame and Axle Assembly g223992 Figure 180 Rear weight Socket-head screw (6 each) Flat washer (4 each) Flange-head screw (4 each) Driveshaft Lock washer (4 each) Rear bumper Flange-head screw (4 each) Bolt (4 each) Rear frame and axle assembly Locknut (2 each) Rear frame and axle assembly (4-wheel drive)
Page 324 Removing the Rear Frame and Axle Assembly (continued) 8. Remove the 4 flange-head screws (item 9 in Figure 180) that secure the rear frame and axle assembly to the machine frame. 9. Carefully move the rear frame and axle assembly from the machine. Installing the Rear Frame and Axle Assembly 1.
Page 325: Chapter 8: Drive Axles
Rear Axle (2-Wheel Drive) g223700 Figure 181 Bolt Locknut Rear axle Steering cylinder Flat washer Flat washer Thrust washer (0.766 inch inner diameter) Pivot pin Thrust washer (1.030 Locknut inch inner diameter) Note: For repair information regarding the rear axle on 4-wheel drive machines; refer to Chapter 8: Drive Axles (page 8–1).
Page 326 Removing the Rear Axle (continued) Note: Several washers (items 5, 6, and 8 in Figure 181) are installed between the axle pivot tube and the rear frame to adjust clearance between the axle pivot tube and rear frame. Before removing the axle pivot pin, note the location of the washers.
Page 327: Servicing The Rear Axle (2-Wheel Drive)
Servicing the Rear Axle (2-Wheel Drive) g223802 Figure 182 Rear axle Grease fitting (4 each) Jam nut (2 each) Flange-head screw Thrust washer Tie rod (2 each) Spindle cap Right spindle Retaining ring Retaining ring Flat washer (2 each) Thrust washer Thrust washer (0.060 inch thick) (2 Jam nut (8 each) Steering pivot bushing (2 each)
Page 328 Axle Pivot Bushings The rear axle must be held in place snugly by the axle pivot pin. Excessive movement of the axle, which is characterized by erratic steering, can indicate worn axle pivot bushings. To correct the problem, replace the axle pivot bushings (item 24 in Figure 182).
Page 329 Steering Pivot Bushings (continued) 5. Use a drift punch and hammer to drive both the steering pivot bushings out of the steering pivot. Clean the inside of the steering pivot to remove any dirt or unwanted material. Also, clean the mounting pin at the bottom of the rear axle.
Page 330 Rear Axle Spindle Bushings (continued) 12. Lubricate the steering spindles through the grease fittings on the rear axle; refer to the Traction Unit Operator’s Manual. 13. Check the rear wheel toe-in; refer to the Traction Unit Operator’s Manual. 14. After all adjustments have been made, ensure that there is no contact between any steering components as the wheels move from lock to lock.
Page 331: Rear Wheel Bearings (2-Wheel Drive)
Rear Wheel Bearings (2-Wheel Drive) g224228 Figure 184 Oil seal Cotter pin Bearing cone (2 each) Bearing cup (2 each) Dust cap Wheel hub Rear wheel Retainer Tab washer Jam nut Note: For repair information regarding the rear axle on 4-wheel drive machines; refer to Chapter 8: Drive Axles (page 8–1).
Page 332 Assembling the Rear Wheel Bearings (continued) 2. Pack both the bearings with grease. Install 1 bearing into the cup on inboard side of the wheel hub. Lubricate the inner surface of the new seal and press it into the wheel hub. 3.
Page 333: Operator Seat
Operator Seat g223702 Figure 185 Seat Flange nut (2 each) Wire cap (4 each) Seat switch Carriage screw (2 each) Socket-head screw (4 each) Washer-head screw (2 each) Flange nut (12 each) Flat washer (4 each) Seat bracket (left) Seat base Seat adjuster Seat adjuster with latch Flange-head screw (2 each)
Page 334 Removing the Operator Seat 1. Park the machine on a level surface, lower the cutting deck (or implement), shut off the engine, set the parking brake, and remove the key from the key switch. 2. Disconnect the negative battery cable from the battery; refer to Servicing the Battery (page 6–80).
Page 335: Mechanical Seat Suspension
Mechanical Seat Suspension g243926 Figure 186 Rivet (2 each) Roll pin Lower shock bolt (2 each) 37. Flat washer Cotter pin Weight adjust spacer Lower housing Spring shaft Roll pin Weight adjust shaft Shaft block (4 each) Extension spring (2 each) Up-stop bumper block Weight adjuster Scissor assembly...
Page 336 Removing the Mechanical Seat Suspension g223699 Figure 187 Seat bracket (right) Wire cap (4 each) Flat washer (8 each) Seat bracket (left) Lower seat bracket (2 Seat adjuster each) Flange-head screw (8 Flange-head screw (4 Socket-head screw (4 each) each) each) Flange nut (12 each) Mechanical suspension...
Page 337 Installing the Mechanical Seat Suspension (continued) 2. Install the seat and seat suspension to the machine; refer to Operator Seat (page 7–19). Ensure to connect the harness electrical connector to the seat switch. Groundsmaster ® 3280-D/3320 Page 7–23 Chassis: Service and Repairs 05138SL Rev B...
Page 338: Pneumatic Seat Suspension
Pneumatic Seat Suspension g223803 Figure 188 Upper housing Bumper spacer (2 each) Thread forming screw (8 each) Convoluted tubing Scissor pivot block (2 each) Lower housing Nylon tubing Hex nut (2 each) Wire harness Air control valve Flange-head screw (2 each) Bolt Connector Retaining ring...
Page 339 g224018 Figure 189 Pneumatic suspension Flange-head screw (4 Lower seat bracket (2 assembly each) each) Removing the Pneumatic Seat Suspension 1. Park the machine on a level surface, lower the cutting deck (or implement), shut off the engine, set the parking brake, and remove the key from the key switch.
Page 340: Lift Arms
Lift Arms g223996 Figure 190 Lift cylinder Jam nut Clevis pin Cotter pin (2 each) Locknut Height-of-cut collar Cylinder pin Bolt Flat washer Cotter pin Hairpin cotter Bolt Pivot pin Hairpin cotter Clevis pin Roll pin Thrust washer (2 each) Carrier bracket Roll pin Rod end...
Page 341 Removing the Lift Arms g224019 Figure 191 Lift arm (left) Rivet (3 each) Plain washer (3 each) Flange bushing (2 each) Plastic pad Spherical bearing Grease fitting (2 each) Rubber pad Retaining ring g224020 Figure 192 Inner roll pin split Roll pin ends flush with pivot pin surface outer roll pin split 1.
Page 342 Installing the Lift Arms 1. If the lift arm was disassembled, install the lift arm components (Figure 191). 2. Install the lift arm components to the machine (Figure 190). A. If the roll pins (items 6 and 7 in Figure 190) were removed from the pivot pin, install the roll pins so that one end is flush with the pivot pin and the inner roll pin split should be opposite to the outer roll pin split...
Page 343 Chapter 8 Drive Axles Table of Contents Specifications ............................8–2 General Information ..........................8–3 Front Axle............................8–3 4-Wheel Drive Rear Axle........................8–3 Special Tools ............................8–5 Differential Gear Holder ........................8–5 Service and Repairs ..........................8–6 Servicing the Brake ..........................8–6 Front Axle Shafts and Bearings......................
Page 344: Specifications
Specifications Item Description Front axle (hydraulic reservoir) fluid Refer to the Traction Unit Operator’s Manual Front axle (hydraulic reservoir) capacity 5.7 L (1.5 US gallons) Refer to the Traction Unit Operator’s Manual for checking the procedure 4-wheel drive rear axle lubricant GL-5 API, SAE 80W−90 gear lube 4-wheel drive rear axle lubricant capacity 2.9 L (0.76 US gallons)
Page 345: General Information
Front Axle g225887 Figure 193 The Groundsmaster 3280-D (for models 30344 and 30345) use a Schafer axle, model A20AA150-1. The Groundsmaster 3280-D (except models 30344 and 30345) and 3320 use a Dana axle, model GT-20. The differential and axle form...
Page 346 4-Wheel Drive Rear Axle (continued) The 4-wheel drive rear axle used on the Groundsmaster 3280-D is a steerable, mechanical drive axle. A driveshaft connected to the front axle output shaft provides power to the 4-wheel drive rear axle. The driveshaft incorporates a...
Page 347: Special Tools
Special Tools You can order the special tools from your Toro Distributor. Differential Gear Holder Toro Part No. TOR4027 Remove the gear cover from right hand side of the differential and bolt this tool in place to lock spur gear in position when removing the nut that secures the pinion coupler.
Page 348: Service And Repairs
Service and Repairs Servicing the Brake g225901 Figure 196 Brake cable link Return spring (right) Adjuster spring Brake return spring Star wheel socket Brake lever retainer Cotter pin Star wheel adjuster Return spring (left) Clevis pin Pivot nut Brake spider Brake cable Brake shoe set Brake lever...
Page 349 Disassembling the Brake (continued) 6. Remove the adjuster spring (item 13 in Figure 196). 7. Spread the upper ends of the brake shoes (item 11 in Figure 196), and remove the star wheel socket, star wheel adjuster, and pivot nut. 8.
Page 350: Front Axle Shafts And Bearings
Front Axle Shafts and Bearings g225902 Figure 197 Front axle housing Star wheel adjuster Adjuster spring Socket-head screw (4 each per Pivot nut Return spring (right) wheel) Axle shaft Hardened washer (4 each per Return spring (left) wheel) Inner axle oil seal Brake lever Wheel stud (5 each per wheel) Bearing retainer...
Page 351 Disassembling the Front Axle Shafts and Bearings 1. Park the machine on a level surface, lower the cutting deck, shut off the engine, set the parking brake, and remove the key from the key switch. 2. Remove the brake return spring (item 24 in Figure 197) from the brake cable link.
Page 352 Disassembling the Front Axle Shafts and Bearings (continued) IMPORTANT Hold the socket-head screws with a wrench to prevent the screw head from rotating and damaging the axle tube. g225905 Figure 200 6. Pull the axle shaft and brake assembly out of the axle housing (Figure 200).
Page 353 Disassembling the Front Axle Shafts and Bearings (continued) g225889 Figure 202 8. Center punch and drill a 6 mm (1/4 inch) hole (approximate) into the outside of the bearing retainer to a depth of about 3/4 the thickness of the retainer (Figure 202).
Page 354 Disassembling the Front Axle Shafts and Bearings (continued) 11. Remove and discard the outer seal plate. g225891 Figure 204 12. Inspect all the components for wear and damage (Figure 204). Replace the axle shaft if the seal has grooved the axle surface more than 0.40 mm (1/64 inch).
Page 355 Assembling the Front Axle Shafts and Bearings (continued) g225893 Figure 206 3. Slide a new bearing retainer on the axle shaft. Support the shaft and retainer in a suitable press and press the bearing retainer firmly against the bearing (Figure 206).
Page 356 Ensure that you do not damage the oil seal and bearing (Figure 208). Note: Liquid gasket kit (Toro Part No. 92-8775) includes Loctite ultra gray silicone (gasket eliminator) and application instructions. g225896 Figure 209 6.
Page 357 Assembling the Front Axle Shafts and Bearings (continued) 7. Slide the brake drum onto the wheel studs. 8. Secure the brake cable to the brake lever with the clevis pin (item 26 in Figure 197) and cotter pin. Attach the brake return spring to the brake cable link. 9.
Page 358: Front Axle (Machine Serial Number Before 316000000)
Front Axle (Machine Serial Number before 316000000) g230990 Figure 210 Bolt Front axle assembly Axle shim (as necessary) Bolt (3 each) Jam nut Hydraulic fitting Lock washer (4 each) Transmission anchor Hose clamp Flat washer Locknut Hydraulic hose Transmission Spacer Carrier bracket (2 each) Mounting spacer (4 each) Wheel-lug nut (5 each per wheel)
Page 359 Removing the Front Axle 1. Park machine on a level surface, lower cutting deck (or implement), shut off the engine, engage parking brake and remove key from the key switch. 2. Remove the cutting deck (or implement); refer to the Cutting Unit Operator’s Manual.
Page 360 Removing the Front Axle (continued) 13. Put a jack or blocking under front axle to prevent it from falling. Remove bolts, flat washers, and locknuts that secure axle mounting pads to frame. Retrieve and note location of axle shims (item 19 in Figure 210).
Page 361: Front Axle (Machine Serial Number After 316000000)
Front Axle (Machine Serial Number after 316000000) g225897 Figure 212 Filter bracket Socket-head screw (4 each) O-ring (2 each) Lock washer (4 each) Flange-head screw (4 each) Flat washer (4 each) Hydraulic pump 90° hydraulic fitting Bolt (4 each) Pump bracket Front wheel assembly O-ring Hydraulic motor...
Page 362 Removing the Front Axle 1. Park the machine on a level surface, lower the cutting deck, shut off the engine, set the parking brake, and remove the key from the key switch. 2. Remove the cutting deck (or implement); refer to the Cutting Unit Operator’s Manual.
Page 363 Removing the Front Axle (continued) 13. Carefully lower the front axle and remove the axle from the machine. Installing the Front Axle 1. Position the front axle to the machine frame and support the axle in place. 2. Place the axle shims in the location that you noted during disassembly. Install the 4 bolts (item 17 in Figure 212), 4 flat washers, and 4 locknuts that...
Page 364: Servicing The Front Axle
Servicing the Front Axle g226662 Figure 214 Hex nut (8 each) Spur gear Differential bearing cup (2 each) Lock washer (8 each) Shim Differential bearing cone (2 each) Dowel pin (2 each) Bolt (8 each) Ring gear Thrust washer (2 each) Washer Lock pin Side bevel gear (2 each)
Page 365 Disassembling the Front Axle 1. Remove the right and left-hand axle assemblies; refer to Disassembling the Front Axle Shafts and Bearings (page 8–9). g225906 Figure 215 2. Remove the 8 housing bolts, 8 hex nuts, and 8 lock washers that secure the axle housings.
Page 366 Disassembling the Front Axle (continued) g225908 Figure 217 4. To remove the differential assembly, place 2 wooden devices (e.g., hammer handles) under the differential case and pry firmly upward. Mark the bearing cups and cones, they must be installed in matched sets (Figure 217).
Page 367 Disassembling the Front Axle (continued) g225910 Figure 219 6. Do not remove the bearings from the differential case unless there is a bearing failure. Whenever the bearings are removed (regardless of usage) they must be replaced with new ones. Remove the case side bearing with a puller as shown in Figure 219.
Page 368 Disassembling the Front Axle (continued) g225912 Figure 221 8. While supporting the differential in a vise, drive the pinion mate shaft from the differential with a long drift punch (Figure 221). g225913 Figure 222 9. To remove the side gears and pinion mate gears, rotate the side gears. This will allow the pinion mate gears to turn to the opening of the case (Figure 222).
Page 369 Disassembling the Front Axle (continued) g225914 Figure 223 10. Remove the 8 side cover bolts, and remove the side cover from the carrier assembly (Figure 223). Clean the gasket material from the mating surfaces before assembly. g226660 Figure 224 Bearing spacer Shim Washer Outer bearing cup...
Page 370 Disassembling the Front Axle (continued) g225915 Figure 225 12. Position the housing assembly on a suitable press. Place a 3 mm (1/8 inch) piece of steel or a screwdriver blade under the edge of the spur gear. This will prevent the spur gear from cocking and possibly cracking the housing (Figure 225).
Page 371 Disassembling the Front Axle (continued) g225917 Figure 227 15. Clamp the inner pinion bearing with a universal bearing remover (Figure 227). Position the unit in a press and carefully push the drive pinion out of the bearing. IMPORTANT Do not allow the pinion to drop on the floor during removal as damage will result.
Page 372 Disassembling the Front Axle (continued) g225919 Figure 229 Insert a press plate of the proper size and press the inner bearing cup toward the inside of the housing. Retain the shims located under the bearing cup (Figure 229). If the shims are damaged, replace with new shims of the same thickness.
Page 373 Assembling the Front Axle (continued) g225921 Figure 231 3. Put the front housing on a press. Use a press plate, push new pinion outer bearing cup into the housing until it bottoms in the housing (Figure 231). IMPORTANT Correct engagement between the ring gear and pinion gear is critical to axle performance and durability.
Page 374 Assembling the Front Axle (continued) B. When you install new ring and pinion gears (supplied in matched sets only) ensure that the numbers etched on both the pinion and ring gear match (Figure 232). Compare the +, -, or 0 markings of the old and new pinions. Adjust the thickness of a new shim pack to compensate for the difference in these 2 numbers.
Page 375 Assembling the Front Axle (continued) g225924 Figure 234 6. Insert the spur gear into the front housing with the chamfered area of the center spline toward the pinion gear. Tap the pinion gear with a soft mallet to engage the splines in the spur gear (Figure 234).
Page 376 Assembling the Front Axle (continued) g225926 Figure 236 8. Install the outer bearing spacer with the chamfer toward the pinion splines and position new outer bearing cone on the pinion shaft (Figure 236). g225927 Figure 237 9. With a hollow press sleeve of proper diameter, press on the outer bearing cone race until the drive pinion seats in the carrier and a slight drag is felt when the gear is rotated by hand (Figure...
Page 377 Assembling the Front Axle (continued) g226661 Figure 238 Bearing spacer Shim Washer Outer bearing cup Seal Outer bearing cone Flange coupler 11. Install the seal into the housing. Install the shim, flange coupler, washer, and nut onto end of the pinion shaft (Figure 238).
Page 378 Assembling the Front Axle (continued) Install the spur gear cover (Figure 239). Torque the bolts to 3 to 4.5 N·m (25 to 40 in-lb). g225929 Figure 240 15. Place the differential case in a vise (Figure 240). Apply grease to new side gear thrust washers and hubs of the side gears.
Page 379 Assembling the Front Axle (continued) g225931 Figure 242 17. Assemble the lock pin. Drive the pin to the approximate center location of the pinion mate shaft. Peen the metal of the case to lock the pin in place (Figure 242). g226482 Figure 243 18.
Page 380 Assembling the Front Axle (continued) g225933 Figure 244 19. When you install new differential bearings, use the original shims or use new shims of the same thickness. Press new differential bearings onto the differential case. If a new differential case is being installed, start with a 0.50 mm (0.020 inch) pack of shims under each differential bearing (Figure 244).
Page 381 Assembling the Front Axle (continued) g225935 Figure 246 22. Use a dial indicator, check the ring gear backlash in 3 equally spaced points. The ring gear backlash should be 0.076 to 0.178 mm (0.003 to 0.007 inch) and must not vary more than 0.05 mm (0.002 inch) between the points checked (Figure 246).
Page 382: Ring To Pinion Gear Engagement (Front Axle)
Ring to Pinion Gear Engagement (Front Axle) Final position of the front axle pinion is verified by using the gear contact pattern method as described in the following procedure. g226484 Figure 248 Top land Lengthwise bearing arc Profile Heel Root Gear tooth definitions (Figure 248):...
Page 383 Every gear has a characteristic pattern. The illustrations show typical patterns only and explain how patterns shift as the gear location is changed. When making pinion position changes, shims should be changed in the range of 0.05 to 0.10 mm (0.002 to 0.004 inch) until a correct pattern has been obtained.
Page 384 g226457 Figure 252 Heel Drive side Coast side Example 3: Backlash incorrect. Thinner pinion position shim necessary. Adjust backlash to match (Figure 252). Gear Pattern Movement Summary 1. Decreasing backlash moves the ring gear closer to the pinion. Drive pattern (convex side of gear) moves lower and toward the toe. Coast pattern (concave side of gear) moves slightly higher and toward the heel.
Page 385: Rear Axle Driveshaft (4-Wheel Drive)
Rear Axle Driveshaft (4-Wheel Drive) g226458 Figure 253 Bi-directional clutch Grease fitting (2 each) Yoke flange (2 each) Lock washer (6 each per flange) Yoke and shaft Yoke and tube Socket-head screw (6 each per Grease fitting flange) Cross and bearing kit (2 each) Front axle flange Removing the Rear Axle Driveshaft (4-Wheel Drive) 1.
Page 386 Installing the Rear Axle Driveshaft (4-Wheel Drive) IMPORTANT If the driveshaft tube and shaft were separated, ensure that the driveshaft yokes are aligned when the tube and shaft are assembled (Figure 253). Misalignment of the yokes will result in shortened driveshaft life and will cause unnecessary vibration.
Page 387: Servicing The Rear Axle Driveshaft Cross And Bearing (4-Wheel Drive)
Servicing the Rear Axle Driveshaft Cross and Bearing (4-Wheel Drive) g226486 Figure 254 End yoke Snap ring (4 each) Cross and bearing kit Shaft yoke 1. Remove the rear axle driveshaft from the machine; refer to Removing the Rear Axle Driveshaft (4-Wheel Drive) (page 8–43).
Page 388: Rear Axle (4-Wheel Drive)
Rear Axle (4-Wheel Drive) g226663 Figure 255 Clutch locator adapter Oscillation stop Thrust washer (as necessary) Bolt (2 each) Thrust washer Thrust washer (as necessary) Bi-directional clutch Jam nut Steering cylinder support bracket Spacer Locknut Steering cylinder ball joint (2 each) Flat washer Flange-head screw (4 each) Retaining ring (2 each)
Page 389 Note: For repair information regarding the rear axle on 2-wheel drive machines; refer to Chapter 7: Chassis (page 7–1). Removing the Rear Axle (4-Wheel Drive) 1. Park the machine on a level surface, lower the cutting deck, shut off the engine, set the parking brake, and remove the key from the key switch.
Page 390 Installing the Rear Axle (4-Wheel Drive) (continued) 10. Start the engine and check for component interference as the steering wheel is turned from lock to lock. 11. Check the rear wheel toe-in and adjust if necessary; refer to the Traction Unit Operator’s Manual.
Page 391: Bevel Gear Case And Axle Case (4-Wheel Drive Axle)
Bevel Gear Case and Axle Case (4-Wheel Drive Axle) The following procedures assume the 4-wheel drive rear axle assembly has been removed from the machine. Removing the Bevel Gear Case and Axle Case (4-Wheel Drive Axle) g226459 Figure 256 Mounting screw Bevel gear case/axle case Locknut assembly...
Page 392: Service And Repairs
Removing the Bevel Gear Case and Axle Case (4-Wheel Drive Axle) (continued) g226460 Figure 258 Axle case Mounting screw Axle case support Support shim 4. Remove the axle case support mounting screws, axle case support, and support shims (Figure 258). Drive Axles: Service and Repairs Page 8–50 Groundsmaster...
Page 393 Removing the Bevel Gear Case and Axle Case (4-Wheel Drive Axle) (continued) g226461 Figure 259 Knuckle pin Axle case cover Spacer O-ring Mounting screws Upper bevel gear Bevel gear case Lower bearing Collar Shaft seal (2 each) Lower bevel gear Upper bearing Axle case Bevel gear shaft...
Page 394 Inspecting the Bevel Gear Case and Axle Case g226462 Figure 260 Knuckle pin Axle case support 1. Measure the knuckle pin outer diameter and the axle case support bushing inner diameter to determine the bushing to pin clearance (Figure 260). Replace the components as necessary.
Page 395 Installing the Bevel Gear Case and Axle Case (4-Wheel Drive Axle) (continued) g226464 Figure 262 Axle case cover Spacer Upper bearing Lower bearing Upper bevel gear Bevel gear shaft Lower bevel gear Collar Thrust washer Knuckle pin 2. Install the lower bevel gear and bevel gear shaft in the axle case cover. Coat a new O-ring with grease and install the axle case cover (Figure 262).
Page 396 Installing the Bevel Gear Case and Axle Case (4-Wheel Drive Axle) (continued) g226465 Figure 263 Dial indicator Axle case Vertical end-play Axle case support Bevel gear case Support shim location Knuckle pin C. Use a dial indicator to measure vertical end-play of the axle case (Figure 263).
Page 397 Installing the Bevel Gear Case and Axle Case (4-Wheel Drive Axle) (continued) g226466 Figure 264 Axle support Upper bevel gear Axle bearing shims Differential shaft gear Dial indicator 7. Temporarily install the bevel gear case/axle case assembly on the axle support.
Page 398 Installing the Bevel Gear Case and Axle Case (4-Wheel Drive Axle) (continued) Position a dial indicator at the tooths center. Prevent the axle from turning and measure the lower bevel gear to the axle gear backlash (Figure 265). Lower bevel gear backlash: 0.10 to 0.40 mm (0.004 to 0.016 inch) 10.
Page 399: Differential Shafts (4-Wheel Drive Axle)
Differential Shafts (4-Wheel Drive Axle) The following procedures assume the 4-wheel drive rear axle assembly has been removed from the machine. Removing the Differential Shaft (4-Wheel Drive Axle) IMPORTANT Do not interchange the right and left differential shafts assemblies. Mark the right and left shafts before disassembly. g226459 Figure 266 Mounting screw...
Page 400 Removing the Differential Shaft (4-Wheel Drive Axle) (continued) 5. Inspect all gears, shafts, bearings, and cases for damage and wear. Replace the components as necessary. Installing the Differential Shaft (4-Wheel Drive Axle) 1. Press the bearings onto the differential shaft. Place correct combination of bearing shims in the axle support and drive the differential shaft and bearing assembly into the axle support.
Page 401: Axle Shafts (4-Wheel Drive Axle)
Axle Shafts (4-Wheel Drive Axle) The following procedures assume the 4-wheel drive rear axle assembly has been removed from the machine. Removing the Axle Shaft (4-Wheel Drive Axle) g226470 Figure 268 Axle case Mounting screw O-ring Axle cover assembly 1. Remove the axle cover mounting screws, and remove the axle cover from the axle case as an assembly (Figure 268).
Page 402 Installing the Axle Shaft (4-Wheel Drive Axle) g226488 Figure 270 Axle cover Axle shaft Bearing Axle shaft seal 1. Coat new axle shaft seal with grease and install the shaft seal in the axle cover (Figure 270). 2. Press the axle cover and bearing assembly onto the axle shaft. Press only on the inner race of the cover bearing (Figure 270).
Page 403: Input Shaft/Pinion Gear (4-Wheel Drive Axle)
Input Shaft/Pinion Gear (4-Wheel Drive Axle) The following procedures assume the 4-wheel drive rear axle assembly has been removed from the machine. Removing the Input Shaft/Pinion Gear (4-Wheel Drive Axle) g226489 Figure 271 Input shaft/pinion gear Bearing case Oil seal Inner bearing Outer bearing Stake washer...
Page 404 Installing the Input Shaft/Pinion Gear (4-Wheel Drive Axle) (continued) 1. If the inner bearing cone was removed, press a new bearing cone all the way onto the input shaft/pinion gear. 2. Place the shaft and bearing assembly in the bearing case and install the outer bearing cone.
Page 405 Installing the Input Shaft/Pinion Gear (4-Wheel Drive Axle) (continued) 9. Use a depth gauge to measure the distance from the end face of the input shaft/pinion gear to the mating surface of the bearing case. Subtract the design cone center distance from this distance to determine initial shim thickness (Figure 273).
Page 406: Differential Gear Assembly (4-Wheel Drive Axle)
Differential Gear Assembly (4-Wheel Drive Axle) The following procedures assume the 4-wheel drive rear axle assembly has been removed from the machine. Removing the Differential Gear Assembly (4-Wheel Drive Axle) 1. Remove the bevel gear case/axle case assemblies; refer to Bevel Gear Case and Axle Case (4-Wheel Drive Axle) (page 8–49).
Page 407 Removing the Differential Gear Assembly (4-Wheel Drive Axle) (continued) g226494 Figure 276 Spring pin Differential case 6. Drive the spring pin from the differential case with a punch and hammer. Discard the spring pin (Figure 276). Note: Mark and arrange all components so that they can be assembled in their original position.
Page 408 Inspecting the Differential Gear Assembly g226496 Figure 278 Side gear Differential case 1. Measure the differential side gear outer diameter and the differential case inner diameter to determine the side gear to case clearance (Figure 278). Replace the components as necessary. Side gear to case clearance: 0.05 to 0.30 mm (0.002 to 0.012 inch) Side gear outer diameter (factory specification): 33.91 to 33.95 mm (1.335 to 1.337 inch)
Page 409 Inspecting the Differential Gear Assembly (continued) g226497 Figure 279 Pinion shaft Pinion gear 2. Measure the differential pinion shaft outer diameter and the pinion gear inner diameter to determine the pinion shaft to pinion gear clearance (Figure 279). Replace the components as necessary. Pinion shaft to pinion gear clearance: 0.03 to 0.25 mm (0.001 to 0.010 inch) Pinion shaft outer diameter (factory specification): 13.97 to 13.98 mm (0.550 to 0.551 inch)
Page 410 Installing the Differential Gear Assembly (4-Wheel Drive Axle) (continued) 1. If the ring gear was removed from the differential case, use medium strength Loctite threadlocker and tighten the mounting screws to 30 to 34 N·m (22 to 25 ft-lb). 2. Apply molybdenum disulfide lubricant (Threebond 1901 or equivalent) to the splines and bearing surfaces of the differential pinion gears, pinion washers, and side gears.
Page 411 Installing the Differential Gear Assembly (4-Wheel Drive Axle) (continued) 15. Coat new O-rings with grease, align the differential shaft splines with the differential gear assembly and slide the differential shaft assemblies onto the axle support. 16. Install the bevel gear case/axle case assemblies; refer to Bevel Gear Case and Axle Case (4-Wheel Drive Axle) (page 8–49).
Page 412: Pinion Gear To Ring Gear Engagement (4-Wheel Drive Axle)
Pinion Gear to Ring Gear Engagement (4-Wheel Drive Axle) The final position of the pinion gear is verified by using the gear contact pattern method as described in the following procedure. g226500 Figure 282 Top land Heel Profile Lengthwise bearing arc Root Gear tooth definitions (Figure...
Page 413 g226502 Figure 284 Input shaft/pinion gear Differential bearing shims Bearing case shims Differential gear case Adjustments to the gear contact position are made by moving the input shaft/pinion gear (bearing case shims) or by moving the differential gear case (differential bearing shims) (Figure 284).
Page 414 Gear Pattern Movement Summary (continued) g226503 Figure 285 Heel contact Base contact 1. If contact is toward the heel or base of the gear (Figure 285), do as follows: A. Install the thicker or additional bearing case shim(s) to move the pinion shaft toward the ring gear.
Page 415: Bi-Directional Clutch (4-Wheel Drive)
Bi-Directional Clutch (4-Wheel Drive) g226505 Figure 287 Rear axle assembly Spacer Lock washer (6 each) Clutch locator adapter Flat washer Socket-head screw (6 each) Bolt (2 each) Lock washer Driveshaft assembly Bi-directional clutch Bolt Bolt (2 each) Removing the Bi-Directional Clutch (4-Wheel Drive) 1.
Page 416 Installing the Bi-Directional Clutch (4-Wheel Drive) (continued) 6. Fill the clutch with oil to the correct level; refer to the Traction Unit Operator’s Manual. Drive Axles: Service and Repairs Page 8–74 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 417: Servicing The Bi-Directional Clutch (4-Wheel Drive)
Servicing the Bi-Directional Clutch (4-Wheel Drive) g226506 Figure 288 Oil seal Snap ring Snap ring End plate Needle bearing Bearing housing Socket-head screw (6 each) Wave spring Roller cage assembly Oil seal Oil seal Thrust washer Bearing Bearing Housing Phillips-head screw with O-ring Retaining ring Disassembling the Bi-Directional Clutch (4-Wheel Drive) 1.
Page 418 Assembling the Bi-Directional Clutch (4-Wheel Drive) (continued) 5. Secure the end plate with the 6 socket-head screws; torque the screws to 19 N·m (14 ft-lb). Drive Axles: Service and Repairs Page 8–76 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 419: General Information
Chapter 9 PTO System Table of Contents General Information ..........................9–2 Service and Repairs ..........................9–3 PTO Drive Belt ........................... 9–3 PTO Driveshaft ..........................9–4 Servicing the PTO Driveshaft Cross and Bearing................9–7 PTO Shaft ............................9–8 Aligning the PTO Pulley to the Electric Clutch Pulley................ 9–11 Groundsmaster ®...
Page 420: General Information
General Information The Operator’s Manual provides information regarding the operation, general maintenance, and maintenance intervals for your machine. Refer to the Operator’s Manual for additional information when servicing the machine. PTO System: General Information Page 9–2 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 421: Service And Repairs
Service and Repairs PTO Drive Belt g220804 Figure 289 Bolt Muffler mount bracket Bolt Flat washer (2 each) Kubota diesel engine Lock washer Compression spring Electric clutch Flat washer Spacer Locknut PTO pulley PTO shaft PTO drive belt PTO tension shaft Note: Refer to the Traction Unit Operator’s Manual for information regarding PTO Belt Adjustment and Installation.
Page 422: Pto Driveshaft
PTO Driveshaft g220803 Figure 290 PTO shaft Cutting deck gearbox Cotter pin Bolt (4 each) Roll pin PTO bearing bracket PTO driveshaft Locknut (4 each) WARNING Do not start the engine and engage the PTO switch when the PTO driveshaft is disconnected from the cutting deck (or implement). If you start the engine and the PTO shaft is allowed to rotate, serious personal injury and machine damage could result.
Page 423 Removing the PTO Driveshaft 1. Park the machine on a level surface, lower the cutting deck (or implement), shut off the engine, set the parking brake, and remove the key from the key switch. 2. Disconnect the end yoke of the PTO driveshaft (item 3 in Figure 290) from the PTO shaft as follows:...
Page 424 Installing the PTO Driveshaft (continued) 3. Secure the end yokes of the PTO driveshaft as follows: A. Install a cotter pin (item 7 in Figure 290) in the end yoke and PTO shaft. B. Install a roll pin (item 5 in Figure 290) in the end yoke and gearbox shaft.
Page 425: Servicing The Pto Driveshaft Cross And Bearing
Servicing the PTO Driveshaft Cross and Bearing g221216 Figure 292 End yoke Shaft yoke Cross and bearing kit Grease fitting Snap ring (4 each) 1. Remove the PTO driveshaft from the machine; refer to Removing the PTO Driveshaft (page 9–5). 2.
Page 426: Pto Shaft
PTO Shaft g220805 Figure 293 Bolt PTO tension shaft Flange bearing (2 each) Lock washer Flange nut (8 each) Bolt (2 each) Flat washer Woodruff key Flat washer (4 each) PTO drive belt PTO shaft Rubber mount (2 each) PTO pulley PTO bearing bracket Bolt (4 each) Carriage screw (4 each)
Page 427 Removing the PTO Shaft (continued) 4. Remove the rear frame and axle assembly from the machine; refer to Removing the Rear Frame and Axle Assembly (page 7–9). 5. Remove the bolt (item 1 in Figure 293), lock washer, and flat washer that secure the pulley to the PTO shaft.
Page 428 Installing the PTO Shaft (continued) 3. Carefully raise the PTO shaft to the machine. 4. Secure the PTO bearing bracket to the frame with the 4 bolts (item 17 in Figure 293) and 4 flange nuts. 5. Secure the rear flange bearing to the PTO tension shaft with the 2 carriage screws (item 6 in Figure 293) and 2 locknuts.
Page 429: Aligning The Pto Pulley To The Electric Clutch Pulley
Aligning the PTO Pulley to the Electric Clutch Pulley Checking the Pulley Alignment 1. Park the machine on a level surface, lower the cutting deck (or implement), shut off the engine, set the parking brake, and remove the key from the key switch.
Page 430 PTO System: Service and Repairs Page 9–12 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 431 Chapter 10 Cutting Units Table of Contents General Information ..........................10–2 Specifications........................... 10–2 Cutting Unit Operator's Manual ......................10–2 Troubleshooting........................... 10–3 Factors That Can Affect Quality of Cut ..................... 10–3 Adjustments ............................10–4 Castor Wheel Tire Pressure ......................10–4 Service and Repairs ........................... 10–5 Cutting Deck ............................
Page 432: General Information
Figure 294 Specifications Several cutting units are available for the Groundsmaster 3280-D and 3320 machines. Refer to the Cutting Unit Operator's Manual for specifications and optional accessories for the cutting unit used on your machine. Note: This chapter gives information about troubleshooting and repair of 72 inch base cutting deck.
Page 433: Troubleshooting
Troubleshooting There are a number of factors that can contribute to unsatisfactory quality of cut, some of which may be turf conditions. The turf conditions such as the excessive thatch, sponginess, or attempting to cut off too much grass height may not always be overcome by adjusting the cutting deck or machine.
Page 434: Adjustments
Refer to the Cutting Unit Operator’s Manual for adjustment procedures for the cutting unit on the Groundsmaster 3280-D and 3320. Castor Wheel Tire Pressure Castor tires on the cutting deck should be inflated to 345 kPa (50 psi).
Page 435: Service And Repairs
Service and Repairs WARNING Do not start the engine and engage the PTO switch when the PTO driveshaft is disconnected from the cutting deck. If you start the engine and the PTO shaft is allowed to rotate, serious personal injury and machine damage could result.
Page 436: Cutting Deck
Idler Assembly g223995 Figure 295 Grease fitting Torsion spring Locknut Snap ring Washer Idler pulley Flange bushing (2 each) Drive belt Idler spacer Idler arm Cutting deck Button-head screw Cutting Units: Service and Repairs Page 10–6 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 437 Removing the Idler Assembly 1. Park the machine on a level surface, lower the cutting deck, shut off the engine, set the parking brake, and remove the key from the key switch. 2. Remove the belt covers from the top of the cutting deck. Remove the drive belt from the deck pulleys;...
Page 438: Blade Spindle
Blade Spindle g223993 Figure 296 Idler pulley (2 each) Left spindle assembly Cutting deck Drive pulley Cutting blade (3 each) Center spindle assembly Drive belt Blade bolt (3 each) Right spindle assembly Ribbed neck bolt (8 each per Anti-scalp cup (3 each) spindle) Removing the Blade Spindle 1.
Page 439 Removing the Blade Spindle (continued) 4. Remove the 8 ribbed neck bolts and 8 flange nuts that secure the spindle assembly to the deck, and remove the spindle assembly from the deck. Installing the Blade Spindle g223662 Figure 297 Left spindle grease fitting Center spindle grease fitting Right spindle grease fitting 1.
Page 440: Servicing The Blade Spindle
Servicing the Blade Spindle Disassembling the Blade Spindle g223663 Figure 298 Locknut Oil seal (2 each) Grease fitting Special hardened washer Bearing spacer Shaft spacer Pulley Ribbed neck bolt (8 each) 11. Spindle shaft O-ring Spindle housing Bearing set 1. Remove the locknut from the top of the spindle shaft. 2.
Page 441 Assembling the Blade Spindle g189007 Figure 299 Bearing Large snap ring Outer spacer Spacer ring Inner spacer Note: A replacement spindle bearing set contains 2 bearings, a spacer ring, and a large snap ring (items 1, 2, and 3 in Figure 299).
Page 442 Assembling the Blade Spindle (continued) g223664 Figure 300 Bearing cup Outer spacer Support Large snap ring Arbor press Arbor press base 3. Use an arbor press to push the bearing cups into the top and bottom of the spindle housing (Figure 300).
Page 443 Assembling the Blade Spindle (continued) 6. Slide the spacer ring and inner bearing spacer into the spindle housing, then install the upper bearing cone and oil seal into the top of the housing. Note: The upper seal must have the lip facing in (down). Also, install upper seal so it is flush to 1.5 mm (0.060 inch) recessed to the housing surface (Figure 301).
Page 444: Gearbox
Gearbox g223994 Figure 303 Right gearbox bracket Taper lock bushing Mount (4 each) Lock washer (4 each) Gearbox Set screw (2 each) Bolt (4 each) Left gearbox bracket Carriage screw (4 each) Flange nut (4 each) Woodruff key Cutting deck Washer (4 each) Drive pulley Removing the Gearbox...
Page 445 Removing the Gearbox (continued) WARNING Do not start the engine and engage the PTO switch when the PTO driveshaft is disconnected from the cutting deck. If you start the engine and the PTO shaft is allowed to rotate, serious personal injury and machine damage could result.
Page 446 Removing the Gearbox (continued) g223658 Figure 305 Oil cap Washer Oil cap Oil seal (2 each) 90° elbow fitting Gearbox Breather plug Plug Dipstick Cutting Units: Service and Repairs Page 10–16 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 447 Removing the Gearbox (continued) 11. If necessary, remove and replace the oil seals and oil caps in the gearbox (Figure 305). Note: If internal gearbox wear or damage occurs, gearbox replacement is necessary. The internal gearbox components are not available. Installing the Gearbox 1.
Page 448: Castor Forks And Wheels
Castor Forks and Wheels g223659 Figure 306 Inner tube Flange nut (5 each per arm) Flange bushing (2 each) Castor arm (left) Castor tire Thrust washer (2 each) Bolt (5 each per arm) Wheel rim half Spacer Bolt Plate Retaining ring Bearing (2 each) Flange nut (4 each) Cap washer...
Page 449 Disassembling the Castor Forks and Wheels 1. Disassemble the castor forks and wheels as necessary (Figure 306). Assembling the Castor Forks and Wheels 1. Assemble the castor forks and wheels. Ensure that the thrust washers (item 18 in Figure 306) are positioned directly above and below the castor arm bushings.
Page 450: Cutting Deck Rollers And Skids
Cutting Deck Rollers and Skids g223660 Figure 307 Right skid Carriage screw (4 each) Bolt (2 each) Roller Cutting deck Washer-head screw (2 each) Left skid Locknut (2 each) Roller shaft Flange-head screw Flange nut (5 each) Roller (2 each) Removing the Cutting Deck Rollers and Skids 1.
Page 451 Chapter 11 Operator Cab Table of Contents General Information ..........................11–2 Operator’s Manual ........................... 11–2 Electrical Components and Schematics................... 11–2 Cab Heater System.......................... 11–2 Service and Repairs ........................... 11–3 Roof Assembly..........................11–3 Heating Components ........................11–5 Mixing Box Assembly ........................11–7 Heater Core ...........................
Page 452: General Information
Appendix A (page A–1). Cab Heater System The cab heater system used on the Groundsmaster 3280-D machine consists of the following components: 1. A heater core located in the headliner of the cab. 2. The hoses to allow a circuit for engine coolant to circulate through the heater core.
Page 453: Service And Repairs
Service and Repairs Roof Assembly g243575 Figure 308 Washer-head screw (16 each) Flat washer (22 each) Cab strap (2 each) Headliner assembly Roof cover Short roof strap (2 each) Short side cover seal (2 each) Flange nut (38 each) Long side cover seal (2 each) Roof Long roof strap (2 each) Shoulder screw (22 each)
Page 454 Removing the Roof Assembly 1. Park the machine on a level surface, lower the cutting deck, shut off the engine, set the parking brake, and remove the key from the key switch. 2. Remove the 16 washer-head screws (item 1 in Figure 308) that secure the roof cover, cover seals, and roof straps to the roof.
Page 455: Heating Components
Heating Components g243012 Figure 309 Heater valve Wiper motor assembly Right intake air filter Left intake air filter Mixing box assembly Groundsmaster ® 3280-D/3320 Page 11–5 Operator Cab: Service and Repairs 05138SL Rev B...
Page 456 Heating Components (continued) g243014 Figure 310 Heater core Blower fan Air diverter assembly Get access to the cab heating components by removing the cab roof; refer to Removing the Roof Assembly (page 11–4). After you remove the cab roof, refer Figure 309 Figure 310 to identify the components used for heating the...
Page 457: Mixing Box Assembly
Mixing Box Assembly g243574 Figure 311 Rivet (19 each) Air diverter assembly Vent hose (left) Tube support (2 each) Mixing box cover Support plate Hose clamp (2 each) Vent hose (right defrost) Cover insulation Flange nut (4 each) Mixing box inlet foam Vent hose (center) Flat washer (4 each) Hose clamp (7 each)
Page 458: Heater Core
Removing the Mixing Box Assembly 1. Park the machine on a level surface, lower the cutting deck, shut off the engine, set the parking brake, and remove the key from the key switch. 2. Remove the roof from the top of the cab to get access to the mixing box assembly;...
Page 459 Installing the Mixing Box Assembly (continued) 4. Operate the heater system to ensure that there are no coolant leaks in the cab headliner. 5. When you complete all the service in the cab headliner, secure the roof to the top of the cab; refer to Installing the Roof Assembly (page 11–4).
Page 460 Heater Core g243783 Figure 313 Mount bracket Rivet (19 each) Cover gasket Mixing box cover Mount bracket cover Tap screw (11 each) Cover insulation Gasket (6 each) Blower fan Air diverter assembly Heater core Mixing box Heater core mount bracket (2 each) Note: The heater core can be removed and installed with the mixing box (item 5 Figure 313) attached to the cab headliner.
Page 461 Removing the Heater Core (continued) 4. Remove the mixing box cover as follows: A. Carefully use a small prybar to raise the head of the pin in the center of each rivet that secures the mixing box cover. B. Lift the rivets from the cover and mixing box. C.
Page 462: Blower Fan
Blower Fan g243780 Figure 314 Rivet (19 each) Air diverter assembly Blower fan Mixing box cover Mixing box Heater core assembly Cover insulation Tap screw (6 each) Note: The blower fan can be removed and installed with the mixing box (item 5 Figure 314) attached to the cab headliner.
Page 463 Removing the Blower Fan (continued) C. Remove the mixing box cover. g243781 Figure 315 Terminal 3 Terminal 2 MIN terminal Ground terminal (orange) (brown) (violet) (black) 5. Note the location of the wire harness connectors on the blower fan assembly (Figure 315), disconnect the wire harness connectors from the fan.
Page 464: Windshield Wiper Assembly
Windshield Wiper Assembly g243015 Figure 316 Bolt Wiper motor Wiper arm assembly Lock washer Flange nut (4 each) Lock washer (2 each) Flange nut (2 each) Cab headliner Screw (2 each) Wiper bracket Washer plate Wiper blade Washer-head screw (2 each) Washer-head screw (4 each) Disassembling the Windshield Wiper Assembly 1.
Page 465 Assembling the Windshield Wiper Assembly 1. If necessary, install the wiper motor components that were removed (Figure 316) and do the following: A. If the wiper bracket (item 4 in Figure 316) was removed, apply bead of RTV sealant around the wiper opening on inside of the headliner before you install the bracket.
Page 466 Operator Cab: Service and Repairs Page 11–16 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 467: Appendix A
Appendix A Foldout Drawings Table of Contents Appendix A ............................A–1 Electrical Drawing Designations ......................A–3 Hydraulic Schematic-3280-D (Serial Numbers below 270000400) and 3320 (Serial Numbers below 280000000) ..........................A–5 Hydraulic Schematic-3280-D (Serial Numbers 270000400 to 311000000) and 3320 (Serial Numbers 280000000 to 311000000)....................A–6 Hydraulic Schematic-3280-D (Serial Numbers 311000001 through 316000000)........A–7 Hydraulic Schematic-3280-D (Machine Serial Numbers after 316000000).........A–8 Electrical Schematic-3320 .........................A–9...
Page 468 Wire Harness Diagram-Light Kit Model 30405 (Machines without Cab)..........A–39 Wire Harness Drawing-North American Light Kit Model 30701 (Machines Serial Number 315000000 and Up) .........................A–40 Wire Harness Diagram-North American Light Kit Model 30701 (Machines Serial Number 315000000 and Up) .........................A–41 Foldout Drawings Page A–2 Groundsmaster ®...
Page 469: Electrical Drawing Designations
Y or YE YELLOW Numerous harness wires used on the Toro machines include a line with an alternate color. These wires are identified with the wire color and line color with either a / or _ separating the color abbreviations listed above (e.g., R/BK is a red wire with a black line, OR_BK is an orange wire with a black line).
Page 470 Foldout Drawings Page A–4 Groundsmaster ® 3280-D/3320 05138SL Rev B...
Page 471: Hydraulic Schematic-3280-D (Serial Numbers Below 270000400) And 3320 (Serial Numbers Below 280000000
Hydraulic Schematic-3280-D (Serial Numbers below 270000400) and 3320 (Serial Numbers below 280000000) g243931 Groundsmaster 3280-D/3320, Drawing 108-2091 Rev -, Sheet 1 of 1 05138SL Rev B Page A–5...
Page 472: Hydraulic Schematic-3280-D (Serial Numbers 270000400 To 311000000) And 3320 (Serial Numbers 280000000 To 311000000
Hydraulic Schematic-3280-D (Serial Numbers 270000400 to 311000000) and 3320 (Serial Numbers 280000000 to 311000000) g243930 Page A–6 05138SL Rev B Groundsmaster 3280-D/3320, Drawing 114-2878 Rev C, Sheet 1 of 1...
Page 473: Hydraulic Schematic-3280-D (Serial Numbers 311000001 Through 316000000
Hydraulic Schematic-3280-D (Serial Numbers 311000001 through 316000000) g243933 Groundsmaster 3280-D, Drawing 120-6589 Rev A, Sheet 1 of 1 05138SL Rev B Page A–7...
Page 474: Hydraulic Schematic-3280-D (Machine Serial Numbers After 316000000
Hydraulic Schematic-3280-D (Machine Serial Numbers after 316000000) g226776 Page A–8 05138SL Rev B Groundsmaster 3280-D, Drawing 133-6390 Rev B, Sheet 1 of 1...
Page 475: Electrical Schematic-3320
Electrical Schematic-3320 g231003 Groundsmaster 3320, Drawing 108-2006 Rev A, Sheet 1 of 1 05138SL Rev B Page A–9...
Page 476: Electrical Schematic (Machine Serial Number Before 311000000
Electrical Schematic (Machine Serial Number before 311000000) g231002 Page A–10 05138SL Rev B Groundsmaster 3280-D, Drawing 108-2007 Rev C, Sheet 1 of 1...
Page 477: Electrical Schematic (Machine Serial Number 311000000 And Up
Electrical Schematic (Machine Serial Number 311000000 and Up) g243927 Groundsmaster 3280-D, Drawing 119-5771 Rev A, Sheet 1 of 1 05138SL Rev B Page A–11...
Page 478: Electrical Schematic-Operator Cab
Electrical Schematic-Operator Cab g226449 Page A–12 05138SL Rev B Operator Cab, Drawing 122-0426 Rev A, Sheet 1 of 2...
Page 479: Electrical Schematic-Operator Cab
Electrical Schematic-Operator Cab g226450 Operator Cab, Drawing 122-0426 Rev A, Sheet 2 of 2 05138SL Rev B Page A–13...
Page 480: Wire Harness Drawing-Main-3320 (Serial Numbers Below 260000000
Wire Harness Drawing-Main-3320 (Serial Numbers below 260000000) g231009 Page A–14 05138SL Rev B Groundsmaster 3320, Drawing 108-2019 Rev F, Sheet 1 of 2...
Page 481: Wire Harness Diagram-Main-3320 (Serial Numbers Below 260000000
Wire Harness Diagram-Main-3320 (Serial Numbers below 260000000) g231010 Groundsmaster 3320, Drawing 108-2019 Rev F, Sheet 2 of 2 05138SL Rev B Page A–15...
Page 482: Wire Harness Drawing-Main-3320 (Serial Numbers Above 260000000
Wire Harness Drawing-Main-3320 (Serial Numbers above 260000000) g231011 Page A–16 05138SL Rev B Groundsmaster 3320, Drawing 110-1684 Rev F, Sheet 1 of 2...
Page 483: Wire Harness Diagram-Main-3320 (Serial Numbers Above 260000000
Wire Harness Diagram-Main-3320 (Serial Numbers above 260000000) g231012 Groundsmaster 3320, Drawing 110-1684 Rev F, Sheet 2 of 2 05138SL Rev B Page A–17...
Page 484: Wire Harness Drawing-Main-3280-D (Serial Numbers Below 260000000)
Wire Harness Drawing-Main-3280-D (Serial Numbers below 260000000) g231005 Page A–18 05138SL Rev B Groundsmaster 3280-D, Drawing 108-2020 Rev D, Sheet 1 of 2...
Page 485: Wire Harness Diagram-Main-3280-D (Serial Numbers Below 260000000
Wire Harness Diagram-Main-3280-D (Serial Numbers below 260000000) g231006 Groundsmaster 3280-D, Drawing 108-2020 Rev D, Sheet 2 of 2 05138SL Rev B Page A–19...
Page 486: Wire Harness Drawing-Main-3280-D (Machine Serial Number 260000000 To 270000600
Wire Harness Drawing-Main-3280-D (Machine Serial Number 260000000 to 270000600) g231007 Page A–20 05138SL Rev B Groundsmaster 3280-D, Drawing 110-1686 Rev E, Sheet 1 of 2...
Page 487: Wire Harness Diagram-Main-3280-D (Machine Serial Number 260000000 To 270000600
Wire Harness Diagram-Main-3280-D (Machine Serial Number 260000000 to 270000600) g231008 Groundsmaster 3280-D, Drawing 110-1686 Rev E, Sheet 2 of 2 05138SL Rev B Page A–21...
Page 488: Wire Harness Drawing-Main-3280-D (Machine Serial Number 270000601 To 311000000
Wire Harness Drawing-Main-3280-D (Machine Serial Number 270000601 to 311000000) g246496 Page A–22 05138SL Rev B Groundsmaster 3280-D, Drawing 114-3398 Rev C, Sheet 1 of 2...
Page 489: Wire Harness Diagram-Main-3280-D (Machine Serial Number 270000601 To 311000000
Wire Harness Diagram-Main-3280-D (Machine Serial Number 270000601 to 311000000) g246497 Groundsmaster 3280-D, Drawing 114-3398 Rev C, Sheet 2 of 2 05138SL Rev B Page A–23...
Page 490: Wire Harness Drawing-Main-3280-D (Machine Serial Number 311000000 To 316000000
Wire Harness Drawing-Main-3280-D (Machine Serial Number 311000000 to 316000000) g243935 Page A–24 05138SL Rev B Groundsmaster 3280-D, Drawing 119-5772 Rev C, Sheet 1 of 2...
Page 491: Wire Harness Diagram-Main-3280-D (Machine Serial Number 311000000 To 316000000
Wire Harness Diagram-Main-3280-D (Machine Serial Number 311000000 to 316000000) g243936 Groundsmaster 3280-D, Drawing 119-5772 Rev C, Sheet 2 of 2 05138SL Rev B Page A–25...
Page 492: Wire Harness Drawing-Main-3280-D (Machine Serial Number 316000000 To 400000000
Wire Harness Drawing-Main-3280-D (Machine Serial Number 316000000 to 400000000) g243937 Page A–26 05138SL Rev B Groundsmaster 3280-D, Drawing 122-0703 Rev C, Sheet 1 of 2...
Page 493: Wire Harness Diagram-Main-3280-D (Machine Serial Number 316000000 To 400000000
Wire Harness Diagram-Main-3280-D (Machine Serial Number 316000000 to 400000000) g243938 Groundsmaster 3280-D, Drawing 122-0703 Rev C, Sheet 2 of 2 05138SL Rev B Page A–27...
Page 494: Wire Harness Drawing-Main-3280-D (Machine Serial Number 400000000 And Up
Wire Harness Drawing-Main-3280-D (Machine Serial Number 400000000 and Up) g226777 Page A–28 05138SL Rev B Groundsmaster 3280-D, Drawing 122-0987 Rev B, Sheet 1 of 2...
Page 495: Wire Harness Diagram-Main-3280-D (Machine Serial Number 400000000 And Up
Wire Harness Diagram-Main-3280-D (Machine Serial Number 400000000 and Up) g226778 Groundsmaster 3280-D, Drawing 122-0987 Rev B, Sheet 2 of 2 05138SL Rev B Page A–29...
Page 496: Wire Harness Drawing-Cab Model 30298 Power
Wire Harness Drawing-Cab Model 30298 Power g243941 Page A–30 05138SL Rev B Cab Model 30298 Power, Drawing 122-0387 Rev A, Sheet 1 of 2...
Page 497: Wire Harness Diagram-Cab Model 30298 Power
Wire Harness Diagram-Cab Model 30298 Power g243942 Cab Model 30298 Power, Drawing 122-0387 Rev A, Sheet 2 of 2 05138SL Rev B Page A–31...
Page 498: Wire Harness Drawing-Cab Model 30298 Headliner
Wire Harness Drawing-Cab Model 30298 Headliner g243429 Page A–32 05138SL Rev B Cab Model 30298 Headliner, Drawing 122-0723 Rev B, Sheet 1 of 2...
Page 499: Wire Harness Diagram-Cab Model 30298 Headliner
Wire Harness Diagram-Cab Model 30298 Headliner g243430 Cab Model 30298 Headliner, Drawing 122-0723 Rev B, Sheet 2 of 2 05138SL Rev B Page A–33...
Page 500: Wire Harness Drawing-Cab Model 30298 Front Mount Accessory Power Supply
Wire Harness Drawing-Cab Model 30298 Front Mount Accessory Power Supply g243939 Page A–34 05138SL Rev B Cab Model 30298 Front Mount Accessory Power Supply, Drawing 122-0158 Rev A, Sheet 1 of 2...
Page 501: Wire Harness Diagram-Cab Model 30298 Front Mount Accessory Power Supply
Wire Harness Diagram-Cab Model 30298 Front Mount Accessory Power Supply g243940 Cab Model 30298 Front Mount Accessory Power Supply, Drawing 122-0158 Rev A, Sheet 2 of 2 05138SL Rev B Page A–35...
Page 502: Wire Harness Drawing-Cab Model 30298 Heat/Air Conditioning Blower
Wire Harness Drawing-Cab Model 30298 Heat/Air Conditioning Blower g243427 Page A–36 05138SL Rev B Cab Model 30298 Heat/Air Conditioning Blower, Drawing 122-0153 Rev B, Sheet 1 of 2...
Page 503: Wire Harness Diagram-Cab Model 30298 Heat/Air Conditioning Blower
Wire Harness Diagram-Cab Model 30298 Heat/Air Conditioning Blower g243428 Cab Model 30298 Heat/Air Conditioning Blower, Drawing 122-0153 Rev B, Sheet 2 of 2 05138SL Rev B Page A–37...
Page 504: Wire Harness Drawing-Light Kit Model 30405 (Machines Without Cab
Wire Harness Drawing-Light Kit Model 30405 (Machines without Cab) g226451 Page A–38 05138SL Rev B Light Kit Model 30405, Drawing 120-3983 Rev A, Sheet 1 of 2...
Page 505 Wire Harness Diagram-Light Kit Model 30405 (Machines without Cab) g226452 Light Kit Model 30405, Drawing 120-3983 Rev A, Sheet 2 of 2 05138SL Rev B Page A–39...
Page 506 Wire Harness Drawing-North American Light Kit Model 30701 (Machines Serial Number 315000000 and Up) g226453 Page A–40 05138SL Rev B North American Light Kit Model 30701, Drawing 122-0668 Rev A, Sheet 1 of 2...
Page 507 Wire Harness Diagram-North American Light Kit Model 30701 (Machines Serial Number 315000000 and Up) g226454 North American Light Kit Model 30701, Drawing 122-0668 Rev A, Sheet 2 of 2 05138SL Rev B Page A–41...

This manual is also suitable for:

Groundsmaster 3320

Toro Groundsmaster 3280-D Service Manual

Table of Contents

Chapter 1: Safety

Chapter 2: Specifications and Maintenance

Chapter 3: Gasoline Engine

Chapter 4: Diesel Engine

Table of Contents

Chapter 5 :Hydraulicsystem

Table of Contents

Chapter 6: Electrical System

Table of Contents

Chapter 7 :Chassis

Chapter 8: Drive Axles

Table of Contents

General Information

Chapter 9 :Ptosystem

Table of Contents

Chapter 10 :Cuttingunits

General Information/Service and Repairs

Appendix A

Quick Links

Chapters

Troubleshooting

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Summary of Contents for Toro Groundsmaster 3280-D