Page 1 WORKSHOP MANUAL TRACTOR M5640SU KiSC issued 07, 2009 A...
Page 2 TO THE READER This Workshop Manual tells the servicing personnel about the mechanism, servicing and maintenance of the M5640SU and M5640DT-SU. It contains 4 parts: "Information", "General", "Mechanism" and "Servicing". Information This section contains information below. • Safety First • Safety Label •...
Page 3 INFORMATION KiSC issued 07, 2009 A...
Page 4: Table Of Contents
INFORMATION CONTENTS 1. SAFETY FIRST ..........................I-1 2. SAFETY DECALS .......................... I-4 3. SPECIFICATIONS.......................... I-8 4. TRAVELING SPEEDS........................I-9 5. DIMENSIONS ..........................I-10 KiSC issued 07, 2009 A...
Page 5: Safety First
INFORMATION M5640SU, M5640DT-SU, WSM 1. SAFETY FIRST SAFETY FIRST • This symbol, the industry's "Safety Alert Symbol", is used throughout this manual and on labels on the machine itself to warn of the possibility of personal injury. Read these instructions carefully.
Page 6 INFORMATION M5640SU, M5640DT-SU, WSM OPERATE SAFELY • Do not use the machine after you consume alcohol or medication or when you are tired. • Put on applicable clothing and safety equipment. • Use applicable tools only. Do not use alternative tools or parts.
Page 7 INFORMATION M5640SU, M5640DT-SU, WSM KEEP A GOOD AIRFLOW IN THE WORK AREA • If the engine is in operation, make sure that the area has good airflow. Do not operate the engine in a closed area. The exhaust gas contains poisonous carbon monoxide.
Page 8: Safety Decals
INFORMATION M5640SU, M5640DT-SU, WSM 2. SAFETY DECALS The following safety decals are installed on the machine. If a decal becomes damaged, illegible or is not on the machine, replace it. The decal part number is listed in the parts list.
Page 9 INFORMATION M5640SU, M5640DT-SU, WSM 9Y1210365INI0002US0 KiSC issued 07, 2009 A...
Page 10 INFORMATION M5640SU, M5640DT-SU, WSM 9Y1210365INI0003US0 KiSC issued 07, 2009 A...
Page 11 INFORMATION M5640SU, M5640DT-SU, WSM 9Y1210365INI0004US0 CARE OF DANGER, WARNING AND CAUTION LABELS 1. Keep danger, warning and caution labels clean and free from obstructing material. 2. Clean danger, warning and caution labels with soap and water, dry with a soft cloth.
Page 12: Specifications
INFORMATION M5640SU, M5640DT-SU, WSM 3. SPECIFICATIONS M5640SU Model Model V2403-M-TE3 Type Vertical, water-cooled, 4-cycle diesel engine Number of cylinders Total displacement 2434 cm (148.6 cu.in.) Bore and stroke 87 × 102.4 mm (3.4 × 4.0 in.) Net power 41.1 kW (55.1 HP)*...
Page 13: Traveling Speeds
INFORMATION M5640SU, M5640DT-SU, WSM 4. TRAVELING SPEEDS (At rated engine rpm) Model M5640SU Tire size (Rear) 14.9-28 Range gear Shift lever Main gear Shift lever km/h (Low) 12.0 (High) 18.3 11.4 27.3 16.9 (Reverse) The company reserves the right to change the specifications without notice.
Page 14: Dimensions
INFORMATION M5640SU, M5640DT-SU, WSM 5. DIMENSIONS 9Y1210365INI0008US0 I-10 KiSC issued 07, 2009 A...
Page 15 GENERAL KiSC issued 07, 2009 A...
Page 16 GENERAL CONTENTS 1. TRACTOR IDENTIFICATION....................... G-1 [1] MODEL NAME AND SERIAL NUMBERS ................G-1 [2] E3B ENGINE .......................... G-3 [3] CYLINDER NUMBER ......................G-3 2. GENERAL PRECAUTIONS......................G-4 3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING ......G-5 [1] WIRING ..........................G-5 [2] BATTERY ..........................
Page 17: Tractor Identification
GENERAL M5640SU, M5640DT-SU, WSM 1. TRACTOR IDENTIFICATION [1] MODEL NAME AND SERIAL NUMBERS When contracting your local KUBOTA distributor, always specify engine serial number, tractor serial number and hourmeter reading. (1) Tractor Identification Plate (4) ROPS Identification Plate (2) Tractor Serial Number...
Page 18 GENERAL M5640SU, M5640DT-SU, WSM Engine Serial Number The engine serial number is an identified number for the engine. It is marked after the engine model number. It indicates month and year of manufacture as follows. Year of manufacture Alphabet or...
Page 19: E3B Engine
Over the past several years, Kubota has been supplying diesel engines that comply with regulations in the respective countries affected by Non-Road Emission regulations. For Kubota Engines, E3 will be the designation that identifies engine models affected by the next emission phase (See the table below).
Page 20: General Precautions
• When it is necessary to use special tools, use KUBOTA special tools. Refer to the drawings when you make special tools that you do not use frequently.
Page 21: Handling Precautions For Electrical Parts And Wiring
GENERAL M5640SU, M5640DT-SU, WSM 3. HANDLING PRECAUTIONS FOR ELECTRICAL PARTS AND WIRING To ensure safety and prevent damage to the machine and surrounding equipment, heed the following precautions in handling electrical parts and wiring. IMPORTANT • Check electrical wiring for damage and loosened connection every year.
Page 22: Wiring
GENERAL M5640SU, M5640DT-SU, WSM • Securely insert grommet. (1) Grommet (A) Correct (B) Incorrect WSM000001GEG0066US1 • Securely clamp, being careful not to damage wiring. (1) Clamp (3) Clamp (Wind Clamp Spirally) (4) Welding Dent (2) Wire Harness WSM000001GEG0067US1 • Clamp wiring so that there is no twist, unnecessary sag, or excessive tension, except for movable part, where sag be required.
Page 23: Battery
GENERAL M5640SU, M5640DT-SU, WSM [2] BATTERY • Take care not to confuse positive and negative terminal posts. • When removing battery cables, disconnect negative cable first. When installing battery cables, check for polarity and connect positive cable first. • Do not install any battery with capacity other than is specified (Ah).
Page 24: Handling Of Circuit Tester
GENERAL M5640SU, M5640DT-SU, WSM • Use sandpaper to remove rust from terminals. • Repair deformed terminal. Make certain there is no terminal being exposed or displaced. (1) Exposed Terminal (3) Sandpaper (2) Deformed Terminal (4) Rust WSM000001GEG0075US1 • Make certain that there is no female connector being too open.
Page 25: Color Of Wiring
GENERAL M5640SU, M5640DT-SU, WSM [6] COLOR OF WIRING • Colors of wire are specified to the color codes. • This symbol of "/" shows color with stripe(s). (An example) Red stripe on white color : W/R Color of wiring Color code...
Page 26: Lubricants, Fuel And Coolant
SAE20, 10W-30 or 10W-40 • Above 25 °C (77 °F) SAE30, 10W-30 or 10W-40 40.0 L Transmission case 42.3 U.S.qts KUBOTA UDT or SUPER UDT fluid* 35.2 Imp.qts 8.0 L KUBOTA UDT or SUPER UDT fluid* Front axle case –...
Page 27 • The oil used to lubricate the transmission is also used as hydraulic fluid. To insure proper operation of the hydraulic system and to complete lubrication of the transmission, it is important that a multi-grade transmission fluid is used in this system. We recommend the use of KUBOTA UDT or SUPER UDT fluid for optimum protection and performance.
Page 28: Tightening Torques
GENERAL M5640SU, M5640DT-SU, WSM 5. TIGHTENING TORQUES [1] GENERAL USE SCREWS, BOLTS AND NUTS Screws, bolts and nuts whose tightening torques are not specified in this Workshop Manual should be tightened according to the table below. Indication on top of bolt...
Page 29: Hydraulic Fittings
GENERAL M5640SU, M5640DT-SU, WSM [3] HYDRAULIC FITTINGS (1) Hydraulic Hose Fitting Tightening torque Hose size Thread side N·m kfg·m lbf·ft 13.8 to 15.6 1.40 to 1.60 10.2 to 11.5 22.6 to 27.4 2.30 to 2.80 16.7 to 20.2 45.2 to 52.9 4.60 to 5.40...
Page 30: Maintenance
GENERAL M5640SU, M5640DT-SU, WSM 6. MAINTENANCE Service Interval Refer- Since Impor- Item ence then tant 50 100 150 200 250 300 350 400 450 500 550 600 650 700 page every 1 Engine start system Check G-20 50 Hr every...
Page 31 • *4 : When the battery is used for less than 100 hours per year, check the battery condition by reading the indicator annually. • The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in U.S.EPA nonroad emission regulation. As the engine owner, you are responsible for the performance of the required maintenance on the engine according to the above instruction.
Page 32: Check And Maintenance
GENERAL M5640SU, M5640DT-SU, WSM 7. CHECK AND MAINTENANCE CAUTION • Be sure to check and service the tractor on a flat place with engine shut off, the parking brake on and chock the wheels. 9Y1210365GEG0006US0 [1] DAILY CHECK To prevent trouble from occurring, it is important to know the condition of the tractor. Check the following items before starting.
Page 33: Check Point Of Initial 50 Hours
GENERAL M5640SU, M5640DT-SU, WSM [2] CHECK POINT OF INITIAL 50 HOURS Changing Engine Oil CAUTION • Be sure to stop the engine before changing the oil. • Allow engine to cool down sufficiently, oil can be hot and can burn.
Page 34 IMPORTANT • To prevent serious damage to the hydraulic system, use only a KUBOTA genuine filter. • Do not operate the tractor immediately after changing the transmission fluid. Run the engine at medium speed for a few minutes to prevent damage to the transmission.
Page 35 2. After draining reinstall the drain plug (1). 3. Fill with the new KUBOTA SUPER UDT fluid up to the upper notch on the dipstick (2). 4. After running the engine for a few minutes, stop it and check the oil level again;...
Page 36: Check Points Of Every 50 Hours
GENERAL M5640SU, M5640DT-SU, WSM [3] CHECK POINTS OF EVERY 50 HOURS Checking Engine Start System CAUTION • Do not allow anyone near the tractor while testing. • If the tractor does not pass the test, do not operate the tractor.
Page 37: Check Points Of Every 100 Hours
GENERAL M5640SU, M5640DT-SU, WSM [4] CHECK POINTS OF EVERY 100 HOURS Greasing 1. Apply a small amount of multipurpose grease to the following points every 100 hours. 2. If you operated the machine in extremely wet and muddy conditions, lubricate grease fittings more often.
Page 38 GENERAL M5640SU, M5640DT-SU, WSM Cleaning Air Cleaner Element 1. Remove the air cleaner cover (4) and primary element (2). 2. Clean the primary element : • When dry dust adheres to the element, blow compressed air from the inside, turning the element. Pressure of compressed air must be under 205 kPa (2.1 kgf/cm...
Page 39 GENERAL M5640SU, M5640DT-SU, WSM Fan Belt Tension CAUTION To avoid personal injury : • Be sure to stop the engine before checking belt tension. 1. Stop the engine and remove the key. 2. Apply moderate thumb pressure to belt between pulleys.
Page 40 GENERAL M5640SU, M5640DT-SU, WSM Adjusting Brake Pedal Free Travel 1. Release the parking brake. 2. Slightly depress the brake pedals and measure free travel "A" at top of pedal stroke. 3. If the measurement is not within the factory specifications, loosen the lock nut (2) and turn the turnbuckle (1) to adjust the rod length within acceptable limit.
Page 41 GENERAL M5640SU, M5640DT-SU, WSM Battery Charging CAUTION • When the battery is being activated, hydrogen and oxygen gases in the battery are extremely explosive. Keep open sparks and flames away from the battery at all times, especially when charging the battery.
Page 42 GENERAL M5640SU, M5640DT-SU, WSM Checking Battery Condition • To avoid the possibility of battery explosion : For the refillable type battery, follow the instructions below. DANGER • Do not use or charge the refillable type battery if the fluid level is below the LOWER (lower limit level) mark.
Page 43: Check Points Of Every 200 Hours
GENERAL M5640SU, M5640DT-SU, WSM [5] CHECK POINTS OF EVERY 200 HOURS Checking Radiator Hose and Hose Clamp Check to see if radiator hoses are properly fixed every 200 hours of operation or six months, whichever comes first. 1. If hose clamps (2) are loose or water leaks, tighten bands (2) securely.
Page 44: Check Point Of Every 300 Hours
GENERAL M5640SU, M5640DT-SU, WSM Adjusting Toe-in 1. Park tractor on a flat place. 2. Turn steering wheel so front wheels are in the straight ahead position. 3. Lower the implement, lock the park brake and stop the engine. 4. Measure distance between tire beads at front of tire, at hub height.
Page 45: Check Points Of Every 600 Hours
GENERAL M5640SU, M5640DT-SU, WSM Greasing (2WD Model) 1. Detach the cover (1), and apply bearing grease. (1) Cover (Front Wheel Hub) 9Y1210365GEG0032US0 [8] CHECK POINTS OF EVERY 600 HOURS Changing Transmission Fluid • Refer to "Changing Transmission Fluid" in "Check Point of Initial 50 Hours".
Page 46: Check Point Of Every 1500 Hours
GENERAL M5640SU, M5640DT-SU, WSM [10] CHECK POINT OF EVERY 1500 HOURS Checking Fuel Injection Nozzle (Injection Pressure) • Refer to "Checking and Adjusting" at "1. ENGINE" section. 9Y1210365GEG0079US0 [11] CHECK POINT OF EVERY 3000 HOURS Checking Turbocharger • Refer to "Checking and Adjusting" at "1. ENGINE" section.
Page 47: Check Points Of Every 2 Years
GENERAL M5640SU, M5640DT-SU, WSM [13] CHECK POINTS OF EVERY 2 YEARS Flush Cooling System and Changing Coolant CAUTION • Do not remove the radiator cap when the engine is hot. Then loosen cap slightly to the stop to relieve any excess pressure before removing cap completely.
Page 48 GENERAL M5640SU, M5640DT-SU, WSM Anti-Freeze CAUTION To avoid personal injury : • When using antifreeze, put on some protection such as rubber gloves (Antifreeze contains poison.). • If should drink antifreeze, throw up at once and take medical attention. • When antifreeze comes in contact with the skin or clothing, wash it off immediately.
Page 49 The LLC contains anticorrosive agent. If mixed with the cleaning agent, sludge may build up, adversely affecting the engine parts. 7. Kubota's genuine long-life coolant has a service life of 2 years. Be sure to change the coolant every 2 years. NOTE •...
Page 50: Service As Required (Others
GENERAL M5640SU, M5640DT-SU, WSM [14] SERVICE AS REQUIRED (OTHERS) Bleeding Fuel System Air must be removed 1. When the fuel filter or lines are removed. 2. When tank is completely empty. 3. After the tractor has not been used for a long period of time.
Page 51 GENERAL M5640SU, M5640DT-SU, WSM Replacing Fuse 1. The tractor electrical system is protected from potential damage by fuses. A blown fuse indicates that there is an overload or short somewhere in the electrical system. 2. If any of the fuses should blow, replace with a new one of the same capacity.
Page 52 GENERAL M5640SU, M5640DT-SU, WSM Replacing Head Lamp CAUTION To avoid personal injury : • Be careful not to drop the bulb, hit anything against the lamp, apply excess force, and get the lamp scratched. If broken, glass may cause injury. Pay more attention to halogen lamps in particular, which have high pressure inside.
Page 53: Special Tools
GENERAL M5640SU, M5640DT-SU, WSM 8. SPECIAL TOOLS [1] SPECIAL TOOLS FOR ENGINE Special Use Puller Set Code No. • 07916-09032 Application • Use exclusively for pulling out bearing, gears and other parts with ease. WSM000001GEG0011US0 Piston Ring Compressor Code No.
Page 54 GENERAL M5640SU, M5640DT-SU, WSM Oil Pressure Tester Code No. • 07916-32032 Application • Use to measure lubricating oil pressure. (1) Gauge (5) Adaptor 2 (2) Cable (6) Adaptor 3 (3) Threaded Joint (7) Adaptor 4 (4) Adaptor 1 (8) Adaptor 5...
Page 55 GENERAL M5640SU, M5640DT-SU, WSM Plastigage Code No. • 07909-30241 Application • Use to check the oil clearance between crankshaft and bearing, etc.. Measuring range • Green : 0.025 to 0.076 mm (0.001 to 0.003 in.) • Red : 0.051 to 0.152 mm (0.002 to 0.006 in.) •...
Page 56 GENERAL M5640SU, M5640DT-SU, WSM Valve Guide Replacing Tool Application • Use to press out and press fit the valve guide. NOTE • These special tools are not provided, so make it referring to the figure. 20 mm dia. (0.79 in. dia.) 11.7 to 11.9 mm dia.
Page 57 GENERAL M5640SU, M5640DT-SU, WSM Crankshaft Bearing 1 Replacing Tool Application • Use to press out and press fit the crankshaft bearing 1. NOTE • These special tools are not provided, so make it referring to the figure. [Extracting tool] 135 mm (5.31 in.) 72 mm (2.83 in.)
Page 58 GENERAL M5640SU, M5640DT-SU, WSM Socket Wrench for Crank Pulley Nut (46 mm Deep Socket Wrench) Application • Use to loosen and tighten the fan drive pulley mounting nut. NOTE • This special tool is not provided, so make it referring to the figure.
Page 59 GENERAL M5640SU, M5640DT-SU, WSM (Continued) Application • Use to fix the crankshaft sleeve of the diesel engine. 42.0 mm (1.6535 in.) 30.5 to 30.6 mm (1.2008 to 1.2047 in.) 23.0 mm (0.9055 in.) 20.0 mm (0.7874 in.) 2.0 mm (0.0787 in.) 31.911 to 31.950 mm dia.
Page 60 GENERAL M5640SU, M5640DT-SU, WSM Injection Pump Pressure Tester Application • Use to check fuel tightness of injection pumps. NOTE • This special tool is not provided, so make it referring to the figure. Pressure gauge full scale : More than 29.4 MPa (300 kgf/cm...
Page 61 GENERAL M5640SU, M5640DT-SU, WSM Balancer Metal Replacing Tool (for Removing) Application • Use to remove the metal bearing. NOTE • These special tools are not provided, so make it referring to the figure. 25 mm (0.98 in. dia.) 41.934 to 41.950 mm dia. (1.6509 to 1.6516 in. dia.) 10 mm (0.39 in.)
Page 62 GENERAL M5640SU, M5640DT-SU, WSM Balancer Metal Replacing Tool (for Fitting) Application • Use to press fit the metal bearing. NOTE • These special tools are not provided, so make it referring to the figure. 0.52 rad (30 °) 5 mm (0.20 in.) 10 mm (0.39 in.)
Page 63 GENERAL M5640SU, M5640DT-SU, WSM Engine Hook 1 Application • Use to fix the engine when hooking, instead of the original hook with hook 2 as a set. NOTE • This special tool is not provided, so make it referring to the figure.
Page 64 GENERAL M5640SU, M5640DT-SU, WSM Engine Hook 2 Application • Use to fix the engine when hooking, instead of the original hook with hook 1 as a set. NOTE • This special tool is not provided, so make it referring to the figure.
Page 65: Special Tools For Tractor
GENERAL M5640SU, M5640DT-SU, WSM [2] SPECIAL TOOLS FOR TRACTOR Tie-rod End Lifter Code No. • 07909-39051 Application • Use for removing the tie-rod end with ease. WSM000001GEG0029US0 Steering Wheel Puller Code No. • 07916-51090 Application • Use for removing the steering wheel without damaging the steering shaft.
Page 66 GENERAL M5640SU, M5640DT-SU, WSM Toe-in Gauge Code No. • 07909-31681 Application • This allows easy measurement of toe-in for all machine models. WSM000001GEG0034US0 Injector CH3 Code No. • 07916-52501 Application • Use for injecting calcium chloride solution into, and removing it from, rear wheel.
Page 67 GENERAL M5640SU, M5640DT-SU, WSM Power Steering Adaptor Code No. • 07916-54021 Application • Use for measuring the relief valve setting pressure for power steering. WSM000001GEG0038US0 Front Axle Rocking Restrictor NOTE • This special tool is not provided, so make it referring to the figure.
Page 68 GENERAL M5640SU, M5640DT-SU, WSM Hydraulic Arm Shaft Bushing Press-Fitting Tool Application • Use for replacing the hydraulic arm shaft bushings in the hydraulic cylinder body. NOTE • This special tool is not provided, so make it referring to the figure.
Page 69 GENERAL M5640SU, M5640DT-SU, WSM Pinion Shaft Remover Application • Use for removing a pinion shaft. NOTE • This special tool is not provided so make it referring to the figure. 106 mm (4.17 in.) 350 mm (13.078 in.) 6 mm (0.24 in.) 90 mm (3.54 in.)
Page 70 GENERAL M5640SU, M5640DT-SU, WSM Hydraulic Clutch Spring Compressor Application • Use exclusively for pushing the spring, to remove the circlip for hydraulic clutch. NOTE • These special tools are not provided, so make it referring to the figure. (1) Tool 4 (Plate) (5) Nut (M x P1.5)
Page 71 GENERAL M5640SU, M5640DT-SU, WSM (3) Tool 1 (Body) 140 mm dia. (5.51 in. dia.) Radius 50 mm (2.0 in.) Radius 3 mm (0.1 in.) 30 mm dia. (1.2 in. dia.) 2.09 rad (120 °) 17 mm dia. (0.67 in. dia.) 60 mm (2.4 in.)
Page 72 GENERAL M5640SU, M5640DT-SU, WSM Cylinder Safety Valve Setting Pressure Adaptor Application • Use for setting the safety valve to the nozzle tester to measure cracking pressure and check oil tightness of the safety valves. NOTE • This special tool is not provided, so make it referring to the figure.
Page 73 GENERAL M5640SU, M5640DT-SU, WSM Clutch Center Tool Application • Use for mounting the travelling to the flywheel. NOTE • This special tool is not provided, so make it referring to the figure. 18.9 to 19.2 mm dia. (0.744 to 0.755 in. dia.) 34.20 to 34.50 mm dia.
Page 74: Tires
• Always maintain the correct tire pressure. Do not inflate tires above the recommended pressure shown in the operator's manual. IMPORTANT • Do not use tires other than those approved by KUBOTA. (A) Insufficient (1) Ground (B) Standard (C) Excessive...
Page 75: Wheel Adjustment
GENERAL M5640SU, M5640DT-SU, WSM [2] WHEEL ADJUSTMENT CAUTION • When working on slopes or when working with trailer, set the wheel tread as wide as practical for maximum stability. • Support tractor securely on stands before removing a wheel. • Do not work under any hydraulically supported devices. They can settle, suddenly leak down, or be accidentally lowered.
Page 76: Front Wheels [4Wd Model
GENERAL M5640SU, M5640DT-SU, WSM (2) Front Wheels [4WD Model] Front tread width can be adjusted as shown with the standard equipped tires. To change the tread width 1. Remove the wheel rim and disc mounting bolts. 2. Change the position of the rim and disc (right and left) to the desired position, and tighten the bolts.
Page 77: Rear Wheels
GENERAL M5640SU, M5640DT-SU, WSM (3) Rear Wheels Rear tread width can be adjusted as shown with the standard equipped tires. To change the tread width 1. Remove the wheel rim and / or disc mounting bolts. 2. Change the position of the rim and disc (right and left) to the desired position, and tighten the bolts.
Page 78: Tire Liquid Injection
GENERAL M5640SU, M5640DT-SU, WSM [3] TIRE LIQUID INJECTION Auxiliary weights can be used to increase traction force for plowing in fields or clayey ground. Another way is to inject water or another liquid, such as a calcium chloride solution in the tires. Water must not be used in winter since it freezes at 0 °C (32 °F).
Page 79 GENERAL M5640SU, M5640DT-SU, WSM Injection CAUTION • When a calcium chloride solution is used, cool it before pouring it into the tire. • Do not fill tires with water or solution more than 75 % of full capacity (to the valve stem level).
Page 80 GENERAL M5640SU, M5640DT-SU, WSM Draining Water or Solution 1. Lift the rear tires off the ground. 2. Turn the tire so that the air valve is at the bottom. 3. Remove the air valve, and drain liquid (liquid can only be drained to the level of the valve and liquid under that level remains inside).
Page 81: Implement Limitations
KUBOTA. Use with implements which are not sold or approved by KUBOTA and which exceed the maximum specifications listed below, or which are otherwise unfit for use with the KUBOTA Tractor may result in malfunctions or failures of the tractor, damage to other property and injury to the operator or others. [Any malfunctions or failures of the tractor resulting from use with improper implements are not covered by the warranty.]...
Page 82 GENERAL M5640SU, M5640DT-SU, WSM M5640SU Implement Remarks Max. Tank Capacity 3000 L (792 U.S.gals, 660 Imp.gals) Slurry Tank Max. Load Capacity 4000 kg (8800 lbs) Max. Load Capacity 4000 kg (8800 lbs) 4500 kg (9900 lbs) Trailer Max. Drawbar Load 1000 kg (2200 lbs) Max.
Page 83 GENERAL M5640SU, M5640DT-SU, WSM M5640SU Implement Remarks Max. Digging Depth 2530 mm (100 in.) Back Hoe** Max. Weight 900 kg (2000 lbs) Max. Width 1820 mm (72 in.) Snow Blade Max. Weight 450 kg (1000 lbs) NOTE • Implement size may very depending on soil operating conditions.
Page 84 ENGINE KiSC issued 07, 2009 A...
Page 85 MECHANISM CONTENTS 1. EGR (EXHAUST GAS RECIRCULATION) SYSTEM..............1-M1 [1] EGR VALVE ......................... 1-M2 [2] EGR COOLER........................1-M2 KiSC issued 07, 2009 A...
Page 86 ENGINE M5640SU, M5640DT-SU, WSM 1. EGR (EXHAUST GAS RECIRCULATION) SYSTEM In order to meet with the strict emission regulations. Kubota has adapted the Exhaust Gas Recirculation (EGR) system. (1) Boost Compensator (2) Thermo Valve (3) Exhaust Manifold (4) Crankcase (5) EGR Cooler...
Page 87 ENGINE M5640SU, M5640DT-SU, WSM [1] EGR VALVE When the temperature of coolant rises above 65 °C (149 °F), the thermo valve (1) opens and boost pressure (B) flows to EGR valve. This boost pressure (B) pushes down EGR valve's diaphragm (5), and opens valve (16). Then exhaust gas cooled by EGR cooler returns to the intake manifold.
Page 88 SERVICING CONTENTS 1. TROUBLESHOOTING.........................1-S1 2. SERVICING SPECIFICATIONS ....................1-S4 3. TIGHTENING TORQUES......................1-S10 4. CHECKING AND ADJUSTING....................1-S11 [1] ENGINE BODY........................1-S11 [2] LUBRICATING SYSTEM.....................1-S13 [3] COOLING SYSTEM ......................1-S13 [4] FUEL SYSTEM........................1-S15 (1) Injection Pump.......................1-S15 (2) Injection Nozzle ......................1-S17 [5] TURBOCHARGER ......................1-S18 5. PREPARATION .........................1-S19 [1] SEPARATING ENGINE FROM CLUTCH HOUSING CASE ..........1-S19 6.
Page 89: Troubleshooting
ENGINE M5640SU, M5640DT-SU, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Engine Does Not No fuel Replenish fuel G-10 Start Air in the fuel system Bleed G-34 Water in the fuel system Change fuel and G-22, repair or replace fuel...
Page 90 ENGINE M5640SU, M5640DT-SU, WSM Reference Symptom Probable Cause Solution Page Either White or Blue Excessive engine oil Reduce to the 1-S20 Exhaust Gas is specified level Observe Piston ring and cylinder worn or stuck Repair or replace 1-S41 Incorrect injection timing...
Page 91 ENGINE M5640SU, M5640DT-SU, WSM Reference Symptom Probable Cause Solution Page Low Oil Pressure Engine oil insufficient Replenish G-10 Oil strainer clogged Clean 1-S39 Relief valve stuck with dirt Clean 1-S37 Relief valve spring weaken or broken Replace 1-S37 Excessive oil clearance of crankshaft bearing...
Page 92: Servicing Specifications
ENGINE M5640SU, M5640DT-SU, WSM 2. SERVICING SPECIFICATIONS ENGINE BODY Item Factory Specification Allowable Limit Cylinder Head Surface Flatness – 0.05 mm / 500 mm 0.0020 in. / 19.69 in. Compression Pressure 3.24 to 3.72 MPa 2.5 MPa (When Cranking with Starting Motor) 33.0 to 38.0 kgf/cm...
Page 93 ENGINE M5640SU, M5640DT-SU, WSM Item Factory Specification Allowable Limit Tappet to Tappet Guide Clearance 0.020 to 0.062 mm 0.07 mm 0.00079 to 0.00244 in. 0.003 in. • Tappet O.D. 23.959 to 23.980 mm – 0.94327 to 0.94409 in. • Tappet Guide I.D.
Page 94 ENGINE M5640SU, M5640DT-SU, WSM Item Factory Specification Allowable Limit Balancer Shaft Journal 1 to Balancer Shaft Clearance 0.030 to 0.111 mm 0.2 mm Bearing 1 0.00119 to 0.00437 in. 0.0079 in. • Balancer Shaft Journal 1 O.D. 43.934 to 43.950 mm –...
Page 95 ENGINE M5640SU, M5640DT-SU, WSM Item Factory Specification Allowable Limit Crankshaft Journal to Crankshaft Bearing 1 Oil Clearance 0.040 to 0.118 mm 0.2 mm 0.00158 to 0.00464 in. 0.0079 in. • Crankshaft Journal O.D. 59.921 to 59.940 mm – 2.3591 to 2.3598 in.
Page 96 ENGINE M5640SU, M5640DT-SU, WSM LUBRICATING SYSTEM Item Factory Specification Allowable Limit Engine Oil Pressure At Idle Speed 98 kPa or more 50 kPa 1.0 kgf/cm or more 0.5 kgf/cm 14 psi or more 7 psi At Rated Speed 300 to 440 kPa 250 kPa 3.0 to 4.5 kgf/cm...
Page 97 ENGINE M5640SU, M5640DT-SU, WSM FUEL SYSTEM Item Factory Specification Allowable Limit Injection Pump Injection Timing 0.149 to 0.174 rad – (8.50 to 10.0 °) before T.D.C. Pump Element Fuel Tightness – 13.7 MPa 140 kgf/cm 1991 psi Delivery Valve Fuel Tightness...
Page 98: Tightening Torques
ENGINE M5640SU, M5640DT-SU, WSM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to "6. TIGHTENING TORQUES" at GENERAL Section.) Item N·m kgf·m lbf·ft...
Page 99: Checking And Adjusting
ENGINE M5640SU, M5640DT-SU, WSM 4. CHECKING AND ADJUSTING [1] ENGINE BODY Compression Pressure 1. Run the engine until it is warmed up. 2. Stop the engine and disconnect the 2P connector from the fuel pump. 3. Remove the air cleaner, the muffler and all injection nozzles.
Page 100 ENGINE M5640SU, M5640DT-SU, WSM Valve Clearance IMPORTANT • Valve clearance must be checked and adjusted when engine is cold. 1. Remove the head cover, the glow plugs and the timing window cover on the clutch housing. 2. Align the "1TC" mark line on the flywheel and center of timing window so that the No.
Page 101: Lubricating System
ENGINE M5640SU, M5640DT-SU, WSM [2] LUBRICATING SYSTEM Engine Oil Pressure 1. Remove the engine oil pressure switch, and set a oil pressure tester (Code No.: 07916-32032). 2. Start the engine. After warming up, measure the oil pressure of both idling and rated speeds.
Page 102 ENGINE M5640SU, M5640DT-SU, WSM Fan Belt Damage and Wear 1. Check the fan belt for damage. 2. If the fan belt is damaged, replace it. 3. Check if the fan belt is worn and sunk in the pulley groove. 4. If the fan belt is nearly worn out and deeply sunk in the pulley groove, replace it.
Page 103: Fuel System
ENGINE M5640SU, M5640DT-SU, WSM [4] FUEL SYSTEM (1) Injection Pump Injection Timing 1. Remove the injection pipes. 2. Set the speed control lever to maximum fuel discharge position. (Reference) • Remove the starter motor and turn the flywheel with screwdriver.
Page 104 5. Set the speed control lever to the maximum speed position. 6. Run the starter to increase the pressure. 7. If the pressure can not reach the allowable limit, replace the pump with new one or repair with a Kubota-authorized pump service shop. 13.7 MPa...
Page 105: Injection Nozzle
ENGINE M5640SU, M5640DT-SU, WSM (2) Injection Nozzle CAUTION • Check the nozzle injection pressure and condition after confirming that there is nobody standing in the direction the fume goes. If the fume from the nozzle directly contacts the human body, cells may be destroyed and blood poisoning may be caused.
Page 106: Turbocharger
ENGINE M5640SU, M5640DT-SU, WSM [5] TURBOCHARGER Turbine Side 1. Check the exhaust port (1) and inlet port (4) side of the turbine housing (3) to see if there is no exhaust gas leak. 2. If any gas leak is found, retighten the bolts and nuts or replace the gasket (2) / (5) with new one.
Page 107: Preparation
ENGINE M5640SU, M5640DT-SU, WSM 5. PREPARATION [1] SEPARATING ENGINE FROM CLUTCH HOUSING CASE Draining Engine Oil 1. Start and warm up the engine for approx. 5 minutes. 2. Place an oil pan underneath the engine. 3. Remove the drain plugs (1) to drain oil.
Page 108 Transmission fluid capacity 42.3 U.S.qts 35.2 Imp.qts IMPORTANT • Use only KUBOTA SUPER UDT fluid. Use of other oils may damage the transmission or hydraulic system. Refer to "5. LUBRICANTS, FUEL AND COOLANT" at GENERAL Section. • Do not mix different brands of fluid together.
Page 109 ENGINE M5640SU, M5640DT-SU, WSM Draining Coolant CAUTION • Never remove the radiator cap (2) until coolant temperature is well below its boiling point. Then loosen cap slightly to the stop to relieve any excess pressure before removing cap completely. 1. Stop the engine and let cool down.
Page 110 ENGINE M5640SU, M5640DT-SU, WSM Wirings 1. Disconnect the connector (1) from coolant temperature sensor. 2. Disconnect the 2P connector (3) and wiring (2) for the alternator. 3. Disconnect the B terminal (6) and 1P connector (7) for the starter motor.
Page 111 ENGINE M5640SU, M5640DT-SU, WSM Rear Bonnet 1. Remove the lower cover (3). 2. Detach the sticker (4) then remove the screw (5). 3. Remove the rear bonnet (2). 4. Disconnect the connector (1) for the fuel sensor. (1) Connector (Fuel Sensor...
Page 112 ENGINE M5640SU, M5640DT-SU, WSM Suction Pipe and 3P Delivery Pipe 1. Remove the suction pipe (2). 2. Remove the 3P delivery pipe (1). (When reassembling) 49.0 to 58.8 N·m 3P delivery pipe joint screw Tightening torque 5.0 to 6.0 kgf·m 36.2 to 43.4 lbf·ft...
Page 113 ENGINE M5640SU, M5640DT-SU, WSM Fuel Tank 1. Remove the fuel pipe (4) from fuel filter and then drain the fuel. 2. Disconnect the fuel return pipes (3). 3. Remove the fuel tank band (2). 4. Remove the fuel tank (1) and fuel tank support (5).
Page 114: Disassembling And Assembling
ENGINE M5640SU, M5640DT-SU, WSM 6. DISASSEMBLING AND ASSEMBLING [1] EXTERNAL COMPONENT Outer Parts of Engine 1. Remove the hydraulic pump (1). 2. Remove the alternator (2). 3. Remove the starter motor (3). 4. Remove the turbocharger. (When reassembling) • Be sure to adjust the fan belt tension.
Page 115: Egr Valve And Egr Cooler
ENGINE M5640SU, M5640DT-SU, WSM [2] EGR VALVE AND EGR COOLER EGR Valve 1. Remove the air tube 1 (3) from the thermo valve (4) and EGR valve (1). 2. Remove the air tube 2 (5) from the thermo valve (4), inlet manifold (2) and boost compensator (6).
Page 116: Cylinder Head And Valves
ENGINE M5640SU, M5640DT-SU, WSM [3] CYLINDER HEAD AND VALVES Cylinder Head Cover 1. Remove the breather hose (1). 2. Remove the head cover screws. 3. Remove the cylinder head cover. (When reassembling) • Check to see if the cylinder head cover gasket is not defective.
Page 117 ENGINE M5640SU, M5640DT-SU, WSM Nozzle Head Seal Service Removal Procedure IMPORTANT • Use a plus (phillips head) screw driver (1) that has a Dia. which is bigger than the heat seal hole (Approx. 6 mm) 1/4 in. 1. Drove screw drive (1) lightly into the heat seal hole.
Page 118 ENGINE M5640SU, M5640DT-SU, WSM Cylinder Head 1. Loosen the pipe clamp (2), and remove the water return pipe (1). 2. Remove the cylinder head screw in the order of (n or r) to (a). 3. Lift up the cylinder head (3) to detach.
Page 119 ENGINE M5640SU, M5640DT-SU, WSM (Continued) IMPORTANT • When replacing piston, piston pin, small end bushing, connecting rod, or crankpin bearings, measure piston head's protrusion or recessing from the level of crankcase cylinder face (average of all pistons) after installing the...
Page 120 ENGINE M5640SU, M5640DT-SU, WSM Valves 1. Remove the valve caps (2). 2. Remove the valve spring collet (3), pushing the valve spring retainer (4) by valve spring replacer (1). 3. Remove the valve spring retainer (4), valve spring (5) and valve stem seal (6).
Page 121: Timing Gears, Camshaft And Fuel Camshaft
ENGINE M5640SU, M5640DT-SU, WSM [4] TIMING GEARS, CAMSHAFT AND FUEL CAMSHAFT Injection Pump 1. Remove the stop solenoid (4) and the hi-idling body (1). 2. Remove the engine stop lever (3) and the stop solenoid guide (6). 3. Remove the fuel injection pump assembly (2).
Page 122 ENGINE M5640SU, M5640DT-SU, WSM Governor Springs and Speed Control Plate NOTE • Specific tool (1) : 1.2 mm diameter hard wire with its end hooked, overall length 200 mm (7.87 in.). The tip of wire is bent like the hook to hang governor springs.
Page 123 ENGINE M5640SU, M5640DT-SU, WSM (Continued) (When reassembling) • Hook the small spring (4) first and then the large governor spring (2) on the speed control plate (6). • Put the specific tool (1) from the injection pump side to catch the large governor spring (2).
Page 124 ENGINE M5640SU, M5640DT-SU, WSM Fan Drive Pulley 1. Lock the flywheel not to turn using the flywheel stopper. 2. Remove the fan drive pulley mounting nut (1) using 46 mm deep socket wrench (3). 3. Remove the fan drive pulley (2) with gear puller (4).
Page 125 ENGINE M5640SU, M5640DT-SU, WSM Relief Valve 1. Remove the cover mounting screw (1) and cover (3). 2. Remove the poppet (4), ball (5) and spring (6). NOTE • This relief valve is not adjustable. (When reassembling) • Apply oil to the O-rings (2).
Page 126 ENGINE M5640SU, M5640DT-SU, WSM Camshaft and Balancer Shaft 1. Remove the camshaft set bolts and draw out the camshaft (1). 2. Remove the balancer shaft 1 (2) set bolts and draw out the balancer shaft 1 (2). 3. Remove the balancer shaft 2 (3) set bolts and draw out the balancer shaft 2 (3).
Page 127: Piston And Connecting Rod
ENGINE M5640SU, M5640DT-SU, WSM Crank Gear 1. Draw out the crank gear (2) with a puller (1). 2. Remove the feather key. (1) Crank Puller (2) Crank Gear 9Y1210365ENS0096US0 [5] PISTON AND CONNECTING ROD Oil Pan and Oil Strainer 1. Remove the oil pan mounting screws.
Page 128 ENGINE M5640SU, M5640DT-SU, WSM Pistons 1. Completely clean carbon (1) in the cylinders. 2. Remove the connecting rad cap (3). 3. Turn the flywheel and bring the piston to top dead center. 4. Draw out the piston upward by lightly tapping it from the bottom of the crankcase with the grip of a hammer.
Page 129 ENGINE M5640SU, M5640DT-SU, WSM Piston Ring and Connecting Rod 1. Remove the piston rings (1), (2), (3) using a piston ring tool. 2. Remove the piston pin (9), and separate the connecting rod (7) from the piston (6). (When reassembling) •...
Page 130: Crankshaft
ENGINE M5640SU, M5640DT-SU, WSM [6] CRANKSHAFT Flywheel 1. Fit the stopper to the flywheel (1). 2. At first, remove two pieces of the flywheel screws (2). 3. Insert two pieces of the flywheel guide screws (3) in the holes. 4. Remove the all flywheel screws (2).
Page 131 ENGINE M5640SU, M5640DT-SU, WSM Crankshaft NOTE • Before disassembling, check the side clearance of crankshaft. Also check it during reassembling. 1. Remove the main bearing case screw 2 (1). 2. Turn the crankshaft to set the crank pin of the 4th cylinder to the horizontal directions (Right or Left).
Page 132 ENGINE M5640SU, M5640DT-SU, WSM Main Bearing Case Assembly 1. Remove the two main bearing case screws 1, and remove the main bearing case assembly being careful with thrust bearing and crankshaft bearing. 2. Remove the main bearing case 1, 2 as above.
Page 133: Servicing
ENGINE M5640SU, M5640DT-SU, WSM 7. SERVICING [1] CYLINDER HEAD AND VALVES Top Clearance 1. Remove the cylinder head. 2. Move the piston up and stick a strip of fuse on the piston head at three position with grease. 3. Lower the piston and install the cylinder head. (Use a new cylinder head gasket and tighten with a specified tightening torque.)
Page 134 ENGINE M5640SU, M5640DT-SU, WSM Cylinder Head Flaw 1. Prepare an air spray red check (Code No. 07909-31371). 2. Clean the surface of the cylinder head with detergent (2). 3. Spray the cylinder head surface with the read permeative liquid (1). Leave it five to ten minutes after spraying.
Page 135 ENGINE M5640SU, M5640DT-SU, WSM Replacing Valve Guide (When removing) 1. Press out the used valve guide using a valve guide replacing tool. (When installing) 1. Clean a new valve guide and valve guide bore, and apply engine oil to them.
Page 136 ENGINE M5640SU, M5640DT-SU, WSM Correcting Valve and Valve Seat NOTE • Before correcting the valve and seat, check the valve stem and the I.D. of valve guide section, and repair them if necessary. • After correcting the valve seat, be sure to check the valve recessing.
Page 137 ENGINE M5640SU, M5640DT-SU, WSM Free Length and Tilt of Valve Spring 1. Measure the free length (B) of valve spring with vernier calipers. If the measurement is less than the allowable limit, replace it. 2. Put the valve spring on a surface plate, place a square on the side of the valve spring.
Page 138: Timing Gears, Camshaft And Fuel Camshaft
ENGINE M5640SU, M5640DT-SU, WSM Oil Clearance between Tappet and Tappet Guide Bore 1. Measure the tappet O.D. with an outside micrometer. 2. Measure the I.D. of the tappet guide bore with a cylinder gauge, and calculate the oil clearance. 3. If the oil clearance exceeds the allowable limit or the tappet is damaged, replace the tappet.
Page 139 ENGINE M5640SU, M5640DT-SU, WSM Idle Gear Side Clearance 1. Set a dial indicator with its tip on the idle gear. 2. Measure the side clearance by moving the idle gear to the front and rear. 3. If the measurement exceeds the allowable limit, replace the idle gear collar.
Page 140 ENGINE M5640SU, M5640DT-SU, WSM Oil Clearance of Balancer Shaft Journal 1. Measure the balancer shaft journal O.D. with an outside micrometer. 2. Measure the cylinder block bore I.D. for balancer shaft with an inside micrometer or cylinder gauge. 3. If the clearance exceeds the allowable limit, replace the balancer shaft.
Page 141 ENGINE M5640SU, M5640DT-SU, WSM Replacing Idle Gear Bushing (A) (When removing) 1. Using an idle gear bushing replacing tool, press out the used bushing. (B) (When installing) 1. Clean a new idle gear bushing and idle gear bore, and apply engine oil to them.
Page 142: Piston And Connecting Rod
ENGINE M5640SU, M5640DT-SU, WSM Oil Clearance of Camshaft Journal 1. Measure the camshaft journal O.D. with an outside micrometer. 2. Measure the cylinder block bore I.D. for camshaft with a cylinder gauge, and calculate the oil clearance. 3. If the oil clearance exceeds the allowable limit, replace the camshaft.
Page 143 ENGINE M5640SU, M5640DT-SU, WSM Replacing Connecting Rod Small End Bushing (A) (When removing) 1. Press out the small end bushing with a connecting rod small end bushing replacing tool. (B) (When installing) 1. Clean a new small end bushing and bore, and apply engine oil to them.
Page 144: Crankshaft
ENGINE M5640SU, M5640DT-SU, WSM Connecting Rod Alignment NOTE • Since the I.D. of the connecting rod small end bushing is the basis of this check, check bushing for wear beforehand. 1. Install the piston pin into the connecting rod. 2. Install the connecting rod on the connecting rod alignment tool.
Page 145 ENGINE M5640SU, M5640DT-SU, WSM Crankshaft Alignment 1. Support the crankshaft with V blocks on the surface plate and set a dial indicator with its tip on the intermediate journal at right angle. 2. Rotate the crankshaft on the V blocks and get the misalignment (half of the measurement).
Page 146 ENGINE M5640SU, M5640DT-SU, WSM Oil Clearance between Crankshaft Journal and Crankshaft Bearing 1 1. Measure the O.D. of the crankshaft journal with an outside micrometer. 2. Measure the I.D. of the crankshaft bearing 1 with an inside micrometer, and calculate oil clearance.
Page 147 ENGINE M5640SU, M5640DT-SU, WSM Oil Clearance between Crankshaft Journal and Crankshaft Bearing 2 1. Put a strip of plastigage on the center of the journal. 2. Install the bearing case and tighten the baring case screws 1 to the specified torque, and remove the bearing case again.
Page 148: Cylinder
ENGINE M5640SU, M5640DT-SU, WSM Replacing Crankshaft Sleeve 1. Remove the used crankshaft sleeve using a special-use puller set (Code No.: 07916-32091). 2. Set the sleeve guide (2) to the crankshaft. 3. Set the stopper (1) to the crankshaft as shown in figure.
Page 149: Oil Pump
ENGINE M5640SU, M5640DT-SU, WSM Correcting Cylinder (Oversize +0.25 mm, 0.0098 in.) 1. When the cylinder is worn beyond the allowable limit, bore and hone it to the specified dimension. 87.250 to 87.272 mm Oversize cylinder I.D. Factory spec. 3.4351 to 3.4359 in.
Page 150 CLUTCH KiSC issued 07, 2009 A...
Page 151 MECHANISM CONTENTS 1. TRAVELLING CLUTCH......................2-M1 [1] FEATURES .......................... 2-M1 [2] TRAVELLING CLUTCH LINKAGE ..................2-M1 2. PTO CLUTCH..........................2-M2 [1] STRUCTURE ........................2-M2 [2] OIL FLOW ..........................2-M4 [3] PTO CLUTCH VALVE ......................2-M4 KiSC issued 07, 2009 A...
Page 152: Travelling Clutch
CLUTCH M5640SU, M5640DT-SU, WSM 1. TRAVELLING CLUTCH [1] FEATURES This tractor is used dry single plate type clutch. The clutch is located between the engine and transmission and is operated by stepping on the clutch pedal. When the clutch pedal is depressed, the clutch is...
Page 153: Pto Clutch
CLUTCH M5640SU, M5640DT-SU, WSM 2. PTO CLUTCH [1] STRUCTURE The PTO shift lever (1) and the PTO clutch valve (3) are connected by the PTO shift cable (2) as shown in the photo. When the PTO shift lever (1) is moved to the B side, the PTO clutch valve (3) is set at "Engaged"...
Page 154 CLUTCH M5640SU, M5640DT-SU, WSM As shown in the figure above, the PTO propeller shaft 1 is splined to the spline hub and is always rotating while the engine is running. The PTO clutch pack has three clutch discs (6), three drive plates (7), a belleville washer (cupped spring washer) (9) and one pressure plate (5).
Page 155: Oil Flow
CLUTCH M5640SU, M5640DT-SU, WSM [2] OIL FLOW When the PTO lever (3) is at the disengaged position, the oil flows is stopped by the PTO clutch valve (1). When the PTO lever (3) is at the engaged position, the oil flows through the PTO clutch valve (1) to the PTO clutch pack (2) to engage it.
Page 156 SERVICING CONTENTS 1. TROUBLESHOOTING.........................2-S1 2. SERVICING SPECIFICATIONS ....................2-S3 3. TIGHTENING TORQUES......................2-S4 4. CHECKING AND ADJUSTMENT ....................2-S5 [1] TRAVELING CLUTCH......................2-S5 [2] PTO CLUTCH........................2-S6 5. DISASSEMBLING AND ASSEMBLING ..................2-S8 [1] TRAVELING CLUTCH......................2-S8 (1) Separating Engine from Clutch Housing Case ..............2-S8 (2) Removing Clutch ......................2-S9 (3) Release Holder and Clutch Lever..................2-S10 [2] PTO CLUTCH........................2-S10 (1) Removing PTO Clutch Valve..................2-S10...
Page 157: Troubleshooting
CLUTCH M5640SU, M5640DT-SU, WSM 1. TROUBLESHOOTING TRAVELLING CLUTCH Reference Symptom Probable Cause Solution Page Clutch Drags Clutch pedal free travel excessive Adjust 2-S5 Dust on clutch disc generated from clutch disc Remove rust 2-S9 facing Release fork broken Replace 2-S10...
Page 158 CLUTCH M5640SU, M5640DT-SU, WSM PTO CLUTCH Reference Symptom Probable Cause Solution Page PTO Clutch Slip Operating pressure is low Adjust 2-S6 PTO clutch valve malfunctioning Repair or replace 2-S10 Clutch disc or drive plate excessively worn Replace 2-S11, 2-S16, 2-S19...
Page 159: Servicing Specifications
CLUTCH M5640SU, M5640DT-SU, WSM 2. SERVICING SPECIFICATIONS TRAVELLING CLUTCH Item Factory Specification Allowable Limit Clutch Pedal Free Travel 35 to 45 mm – 1.4 to 1.7 in. Clutch Pedal Total Stroke 165 to 170 mm – 6.50 to 6.69 in.
Page 160: Tightening Torques
CLUTCH M5640SU, M5640DT-SU, WSM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to "6. TIGHTENING TORQUES" at GENERAL Section.) Item N·m kgf·m lbf·ft...
Page 161: Checking And Adjustment
CLUTCH M5640SU, M5640DT-SU, WSM 4. CHECKING AND ADJUSTMENT [1] TRAVELING CLUTCH Clutch Pedal Stroke 1. Measure the clutch pedal (1) total stroke. 2. If the measurement is not within the factory specifications, adjust it. 3. After adjustment, tighten the lock nut (3) firmly.
Page 162: Pto Clutch
CLUTCH M5640SU, M5640DT-SU, WSM [2] PTO CLUTCH Relief Valve Setting Pressure 1. Start the engine and warm up the transmission fluid, and then stop the engine. 2. Remove the plug (4) (PT 1/8) on the PTO valve spool (5). 3. Set the adaptor (PT 1/8) (Use the oil pressure tester for diesel engines.
Page 163 CLUTCH M5640SU, M5640DT-SU, WSM PTO Clutch Lever Movement 1. Stop the engine and remove the key. 2. Check the PTO clutch lever (1) on the "ON" and "OFF" position of PTO clutch lever guide. 3. If adjustment is needed, loosen the lock nuts (3) and adjust the clutch control cable (2) length.
Page 164: Disassembling And Assembling
CLUTCH M5640SU, M5640DT-SU, WSM 5. DISASSEMBLING AND ASSEMBLING [1] TRAVELING CLUTCH (1) Separating Engine from Clutch Housing Case Clutch Pedal and Shaft 1. Remove the bonnet and rear bonnet. 2. Remove the clevis pin at the end of clutch rod (2).
Page 165: Removing Clutch
CLUTCH M5640SU, M5640DT-SU, WSM (2) Removing Clutch Removing Clutch 1. Remove the clutch from the flywheel. (When reassembling) • Direct the shorter end of the clutch disc boss toward the flywheel. • Apply molybdenum disulphide (Three Bond 1901 or equivalent) to the splines of clutch disc boss.
Page 166: Release Holder And Clutch Lever
CLUTCH M5640SU, M5640DT-SU, WSM (3) Release Holder and Clutch Lever Release Holder and Clutch Lever 1. Draw out the clutch release holder (5) and the release bearing (2) as a unit. 2. Remove the release fork setting screws (1). 3. Draw out the clutch lever (4) to remove the release fork (3).
Page 167: Pto Clutch Pack
Capacity 42.3 U.S.qts 35.2 Imp.qts IMPORTANT • Use only KUBOTA SUPER UDT fluid. Use of other fluids may damage the transmission or hydraulic system. • Refer to "5. LUBRICANTS, FUEL AND COOLANT" at GENERAL Section. • Do not mix different brands fluid together.
Page 168 CLUTCH M5640SU, M5640DT-SU, WSM ROPS Upper and Rear Wheels 1. Place the disassembling stand under the clutch housing case and transmission case. 2. Install the front axle rocking resister (refer to the "8. SPECIAL TOOLS" at "G. GENERAL" section). 3. Remove the lift rod (5), lower link (6) and stabilizer (4).
Page 169 CLUTCH M5640SU, M5640DT-SU, WSM Seat, Fender and ROPS Under Frame 1. Remove the seat (3). 2. Remove the position control lever grips (2). 3. Remove the auxiliary speed change lever grip (5), DT shift lever grip (4) and 3-point hitch lowering speed control grip (6).
Page 170 CLUTCH M5640SU, M5640DT-SU, WSM Auxiliary Shift Lever and Brake Rod 1. Disconnect the shift rods (1). 2. Remove the brake rods (2). 3. Remove the DT rod (3). (When reassembling) • Be sure to adjusting the shift rod. Approx. Shift rod length L1 and Factory spec.
Page 171: Removing Pto Clutch
CLUTCH M5640SU, M5640DT-SU, WSM (2) Removing PTO Clutch PTO Clutch Valve, PTO Clutch and Holder 1. Remove the PTO clutch valve (1). 2. Remove the PTO clutch pack (4) with holder (2). (When reassembling) • Apply transmission fluid to the O-ring.
Page 172: Disassembling Pto Clutch Pack
CLUTCH M5640SU, M5640DT-SU, WSM (3) Disassembling PTO Clutch Pack Clutch Hub and Clutch Discs 1. Remove the internal circlip (6), and then take out the clutch discs (3), belleville washer (cupped spring washer) (5), back plate (4), steel plates (7), (8), and the hub (2).
Page 173 CLUTCH M5640SU, M5640DT-SU, WSM Clutch Case 1. Remove the internal snap ring (1). 2. Remove the external snap ring (2). 3. Remove the clutch case (7) and brake disc (5). (When reassembling) • Direct the contact part of the brake disc (5) to the brake plate (6).
Page 174: Servicing
CLUTCH M5640SU, M5640DT-SU, WSM 6. SERVICING [1] TRAVELLING CLUTCH Clearance between Clutch Pedal Shaft and Pedal Bushing 1. Measure the clutch pedal shaft O.D. with an outside micrometer. 2. Measure the clutch pedal bushing I.D. with a cylinder gauge. 3. Calculate the clearance.
Page 175: Pto Clutch
CLUTCH M5640SU, M5640DT-SU, WSM Checking Pressure Plate Assembly and Flywheel 1. Wash the disassembling parts except clutch disc with a suitable cleaning solvent to remove dirt and grease before making inspection and adjustment. 2. Inspect the friction surface of pressure plate and flywheel for scoring or roughness.
Page 176 CLUTCH M5640SU, M5640DT-SU, WSM Flatness of PTO Piston and PTO Steel Plate 1. Place the part on a surface plate. 2. Check it unable to insert a feeler gauge (allowable limit size) underneath it at least four points. 3. If the gauge can be inserted, replace it.
Page 177 TRANSMISSION KiSC issued 07, 2009 A...
Page 178 MECHANISM CONTENTS 1. STRUCTURE..........................3-M1 [1] 4WD MODEL ........................3-M1 [2] 2WD MODEL ........................3-M2 2. TRAVELING SYSTEM........................ 3-M3 [1] MAIN GEAR SHIFT SECTION ..................... 3-M3 [2] SHUTTLE SHIFT SECTION (LOW-REVERSE) ..............3-M4 [3] HI-RANGE SHIFT SECTION....................3-M5 [4] SHIFT LINKAGE MECHANISM.................... 3-M6 [5] FOUR WHEEL DRIVE SECTION..................
Page 179: Structure
TRANSMISSION M5640SU, M5640DT-SU, WSM 1. STRUCTURE [1] 4WD MODEL (1) Clutch Section (2) Main Gear Shift Section (3) Auxiliary Change (H, R-L) Section (4) PTO Clutch (5) PTO Gear Section (6) Front Drive Section 3-M1 KiSC issued 07, 2009 A...
Page 180: 2Wd Model
TRANSMISSION M5640SU, M5640DT-SU, WSM [2] 2WD MODEL (1) Clutch Section (2) Main Gear Shift Section (3) Auxiliary Change (H, R-L) Section (4) PTO Clutch (5) PTO Gear Section 3-M2 KiSC issued 07, 2009 A...
Page 181: Traveling System
TRANSMISSION M5640SU, M5640DT-SU, WSM 2. TRAVELING SYSTEM [1] MAIN GEAR SHIFT SECTION (1) Gear Shaft 21T (2) 34T Gear (3) 1st Shaft (4) 25T Gear (5) 20T Gear (6) Shifter (7) Hub (8) 19T Gear (9) Shifter (10) Hub (11) 23T Gear...
Page 182: Shuttle Shift Section (Low-Reverse)
TRANSMISSION M5640SU, M5640DT-SU, WSM [2] SHUTTLE SHIFT SECTION (LOW-REVERSE) Shuttle Shift Section The shuttle shift section allows the operators to change forward and reverse with a auxiliary speed change lever. It is used synchromesh type gear shift. It also operates as a reduction until when shifting from forward to reverse.
Page 183: Hi-Range Shift Section
TRANSMISSION M5640SU, M5640DT-SU, WSM [3] HI-RANGE SHIFT SECTION (1) 21T Gear Shaft (2) 1st Shaft (3) 28T Gear (4) 2nd Shaft (5) 3rd Shaft (6) Hub (7) Shifter (8) 24T Gear The Hi-Range shift section allows the operator to change Hi with an auxiliary speed change lever.
Page 184: Shift Linkage Mechanism
TRANSMISSION M5640SU, M5640DT-SU, WSM [4] SHIFT LINKAGE MECHANISM Shift Levers The main shift laver (1) is located on clutch housing case. The auxiliary speed shift lever (2) is located left side of side of the seat. (1) Main Shift Lever...
Page 185: Four Wheel Drive Section
TRANSMISSION M5640SU, M5640DT-SU, WSM [5] FOUR WHEEL DRIVE SECTION 2 wheel drive or 4 wheel drive is selected by changing the position of shifter (2) on the propeller shaft 1 (1) using the front wheel drive lever. When the front wheel drive lever is set to "Disengaged", the shifter is in neutral and power is not...
Page 186: Pto System
TRANSMISSION M5640SU, M5640DT-SU, WSM 3. PTO SYSTEM All models have Live PTO's (Independent PTO's) which have their own clutch controls completely separate from the travelling clutch and transmission. Therefore, the PTO can operate while the tractor is stopped and also the PTO can be disengaged and engaged while the tractor is in motion.
Page 187 SERVICING CONTENTS 1. TROUBLESHOOTING.........................3-S1 2. SERVICING SPECIFICATIONS ....................3-S2 3. TIGHTENING TORQUES......................3-S3 4. CHECKING AND ADJUSTING....................3-S4 [1] AUXILIARY SHIFT LEVER....................3-S4 5. DISASSEMBLING AND ASSEMBLING ..................3-S5 [1] PREPARATION FOR SEPARATING ENGINE, CLUTCH HOUSING CASE AND TRANSMISSION CASE ....................3-S5 (1) Separating Engine and Clutch Housing Case ..............3-S5 (2) Separating Clutch Housing Case and Transmission Case..........3-S5 [2] DISASSEMBLING CLUTCH HOUSING ................3-S6 [3] SEPARATING DT GEAR ....................3-S13...
Page 188: Troubleshooting
TRANSMISSION M5640SU, M5640DT-SU, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Excessive Transmission fluid insufficient Replenish G-10 Transmission Noise Improper backlash between bevel pinion shaft Replace 3-S25 and bevel gear Improper backlash between differential pinion Adjust 3-S26 and side gear...
Page 189: Servicing Specifications
TRANSMISSION M5640SU, M5640DT-SU, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Shift Fork to Shifter Groove • 3rd-4th Clearance 0.05 to 0.3 mm 0.80 mm 0.062 to 0.01 in. 0.031 in. • Other Clearance 0.15 to 0.40 mm 0.80 mm 0.0059 to 0.015 in.
Page 190: Tightening Torques
TRANSMISSION M5640SU, M5640DT-SU, WSM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to "6. TIGHTENING TORQUES" at GENERAL Section.) Item N·m kgf·m lbf·ft...
Page 191: Checking And Adjusting
TRANSMISSION M5640SU, M5640DT-SU, WSM 4. CHECKING AND ADJUSTING [1] AUXILIARY SHIFT LEVER Checking Function of Auxiliary SHift 1. Check the function of the main gear shift. • Neutral position to H gear position. • Neutral position to L gear position.
Page 192: Disassembling And Assembling
TRANSMISSION M5640SU, M5640DT-SU, WSM 5. DISASSEMBLING AND ASSEMBLING [1] PREPARATION FOR SEPARATING ENGINE, CLUTCH HOUSING CASE AND TRANSMISSION CASE (1) Separating Engine and Clutch Housing Case Separating Engine from Clutch Housing and Panel Frame 1. Refer to the "[1] SEPARATING ENGINE FROM CLUTCH HOUSING CASE"...
Page 193: Disassembling Clutch Housing
TRANSMISSION M5640SU, M5640DT-SU, WSM [2] DISASSEMBLING CLUTCH HOUSING Speed Change Cover 1. Remove the speed change cover (1). 2. Remove the spring (2) and ball (3) using a magnet tool. (When reassembling) • When reassembling the speed change cover (1), set the shifter and fork in neutral position.
Page 194 TRANSMISSION M5640SU, M5640DT-SU, WSM Bearing Holder 1. Remove the PTO propeller shaft (3) to the rearward. 2. Remove the bearing holder (1) with the 21T gear shaft (2) by screwing M8 × Pitch 1.25 screws into the threaded holes "A".
Page 195 TRANSMISSION M5640SU, M5640DT-SU, WSM Shift Levers and Shift Rods (Auxiliary Shift Change H, R-L) 1. Remove the spring pin (1) and (2). 2. Remove the lock screw (3) and (4), then remove the balls (7) and springs (16). 3. Remove the stopper plate (5) and (6).
Page 196 TRANSMISSION M5640SU, M5640DT-SU, WSM Shift Rod and Shift Fork (Main Shift 1-2-3-4) 1. Remove the spring pin (2) and (4). 2. Remove the shift rod (1st-2nd) (1) and (3rd-4th) (7). 3. Remove the shift fork (1st-2nd) (8) and (3rd-4th) (3).
Page 197 TRANSMISSION M5640SU, M5640DT-SU, WSM 1st Shaft, 2nd Shaft and 3rd Shaft 1. Tap out the 1st shaft (1), 2nd shaft (2) and 3rd shaft (3) to forward. 2. Remove the 3rd shaft assembly (3) together with shift fork (4) and (5).
Page 198 TRANSMISSION M5640SU, M5640DT-SU, WSM 2nd Shaft 1. Remove the external snap ring (13). 2. Remove the gears. (1) Bearing (8) Inner Race (2) Synchronizer Ring (Corn) (9) 28T Gear (3) Synchronizer Ring (10) 36T Gear (4) Synchronizer Spring (11) 2nd Shaft (13T Gear Shaft)
Page 199 TRANSMISSION M5640SU, M5640DT-SU, WSM 3rd Shaft 1. Remove the bearing (20) and gears. 2. Remove the bearing (1) and external snap ring (2). 3. Remove the gears. (When reassembling) • Apply enough transmission fluid to the synchronizer portion. • Install the protrusion portions "B" of the center rings (12) to the holes "A"...
Page 200: Separating Dt Gear
TRANSMISSION M5640SU, M5640DT-SU, WSM [3] SEPARATING DT GEAR Removing DT Gear Case 1. Remove the DT gear case (1). (When reassembling) • Apply liquid gasket (Three Bond 1206C or equivalent) to joint face of the clutch housing and DT gear case.
Page 201 TRANSMISSION M5640SU, M5640DT-SU, WSM DT Gear Case 1. Remove the internal snap ring (1). 2. Tap out the idle shaft (4) with bearing (2) to the forward. NOTE • Do not hit the needle bearing (6) when tap out the idle shaft (9).
Page 202: Transmission Case
TRANSMISSION M5640SU, M5640DT-SU, WSM [4] TRANSMISSION CASE (1) Separating Rear Axle Assembly Rear Axle 1. Support the rear axle case assembly (1) with nylon lift strap and hoist. 2. Remove the rear axle case mounting screws and nuts. 3. Separate the rear axle case from transmission case.
Page 203: Pto Gear Case
TRANSMISSION M5640SU, M5640DT-SU, WSM (2) PTO Gear Case Disassembling PTO Gear Case Assembly 1. Remove the stake of the staking nut and remove the staking nut (1). 2. Tap out the PTO shaft (8). 3. Remove the internal snap ring (4).
Page 204: Differential Lock Fork
TRANSMISSION M5640SU, M5640DT-SU, WSM (3) Differential Lock Fork Differential Lock Fork 1. Remove the clevis pin (1). 2. Remove the plug (2) and adjusting shims (3). 3. Remove the spring holder mounting nuts. 4. Tap out the differential lock shaft (5) with the spring holder (4).
Page 205: Removing Differential Gear Assembly
TRANSMISSION M5640SU, M5640DT-SU, WSM (4) Removing Differential Gear Assembly Differential Gear Assembly 1. Remove the differential support (1), (4), noting the number of shims (3). 2. Take out the differential gear assembly (7) from transmission case together with differential lock shifter (6).
Page 206: Differential Gear
TRANSMISSION M5640SU, M5640DT-SU, WSM 9T Spiral Bevel Pinion Shaft 1. Remove the stake of staking nut (2). 2. Set the staking nut locking wrench (1). 3. Set the spiral bevel pinion shaft turning wrench. 4. Turn the spiral bevel pinion shaft turning wrench to the clockwise, then remove it.
Page 207 TRANSMISSION M5640SU, M5640DT-SU, WSM Spiral Bevel Gear 1. Remove the spiral bevel gear. (When reassembling) • Check the spiral bevel gear for wear or damage. If it is no longer serviceable, replace it. Then, also replace the spiral bevel pinion shaft.
Page 208: Servicing
TRANSMISSION M5640SU, M5640DT-SU, WSM 6. SERVICING [1] BEARING, SHIFT FORK ANS SYNCHRONIZER Ball Bearing 1. Hold the inner race, and push and pull the outer race in all directions to check for wear and roughness. 2. Apply transmission fluid to the bearing, and hold the inner race.
Page 209: Differential Gear
TRANSMISSION M5640SU, M5640DT-SU, WSM [2] DIFFERENTIAL GEAR IMPORTANT • When reassembling spiral bevel pinion shaft and differential assembly, be sure to adjust the following. – Turning torque of spiral bevel pinion shaft only. – Backlash and tooth contact between spiral bevel pinion shaft and spiral bevel gear.
Page 210: Backlash And Tooth Contact
TRANSMISSION M5640SU, M5640DT-SU, WSM (2) Backlash and Tooth Contact Backlash and Tooth Contact between Spiral Bevel Gear and Spiral Bevel Pinion Shaft 1. Set the dial indicator (lever type) with its finger on the tooth surface. 2. Measure the backlash by fixing the spiral bevel pinion shaft (1) and moving the spiral bevel gear (2) by hand.
Page 211 TRANSMISSION M5640SU, M5640DT-SU, WSM (Continued) • Proper Contact More than 35 % red lead contact area on the gear tooth surface. The center of tooth contact at 1/3 of the entire width from the small end. • Shallow or Heel Contact Replace the adjusting collar 1 (3) with thicker one to move the spiral bevel pinion shaft backward.
Page 212: Differential Gear
TRANSMISSION M5640SU, M5640DT-SU, WSM (3) Differential Gear Clearance between Differential Case Bore (Differential Case Cover Bore) and Differential Side Gear Boss 1. Measure the bore I.D. of the differential case and differential case cover. 2. Measure the differential side gear boss O.D. and calculate the clearance.
Page 213: Differential Lock Fork
TRANSMISSION M5640SU, M5640DT-SU, WSM Backlash between Differential Pinion and Differential Side Gear 1. Set a dial indicator (lever type) on the tooth of the differential pinion. 2. Hold the differential side gear and move the differential pinion to measure the backlash.
Page 214 REAR AXLE KiSC issued 07, 2009 A...
Page 215 MECHANISM CONTENTS 1. FEATURES..........................4-M1 KiSC issued 07, 2009 A...
Page 216 REAR AXLE M5640SU, M5640DT-SU, WSM 1. FEATURES (1) Rear Axle (6) Differential Case (10) Differential Gear (14) 25T Planetary Gear (2) Rear Axle Case (7) Differential Side Gear (11) 42T Bevel Gear (15) 65T Internal Gear (3) Planetary Gear Support...
Page 217 SERVICING CONTENTS 1. TROUBLESHOOTING.........................4-S1 2. SERVICING SPECIFICATIONS ....................4-S2 3. TIGHTENING TORQUES......................4-S3 4. DISASSEMBLING AND ASSEMBLING ..................4-S4 [1] SEPARATING RAR AXLE CASE FROM TRANSMISSION CASE ........4-S4 [2] DISASSEMBLING PLANETARY GEAR................4-S6 [3] DISASSEMBLING REAR AXLE ....................4-S7 5. SERVICING ..........................4-S8 KiSC issued 07, 2009 A...
Page 218: Troubleshooting
REAR AXLE M5640SU, M5640DT-SU, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Excessive or Unusual Improper backlash between brake shaft's 13T Replace 4-S6, 4-S7 Noise at All Time gear and planetary gear Improper backlash between planetary gear and Replace...
Page 219: Servicing Specifications
REAR AXLE M5640SU, M5640DT-SU, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Internal Gear to Planetary Gear Backlash 0.08 to 0.3 mm 0.5 mm 0.004 to 0.01 in. 0.02 in. Planetary Gear Thrust Collar Thickness 1.55 to 1.65 mm 1.2 mm...
Page 220: Tightening Torques
REAR AXLE M5640SU, M5640DT-SU, WSM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to "6. TIGHTENING TORQUES" at GENERAL Section.) Item N·m kgf·m...
Page 221: Disassembling And Assembling
Transmission fluid capacity 42.3 U.S.qts 35.2 Imp.qts IMPORTANT • Use only KUBOTA SUPER UDT fluid. Use of other oils may damage the transmission or hydraulic system. Refer to "5. LUBRICANTS, FUEL AND COOLANT" at GENERAL Section. • Do not mix different brands of fluid together.
Page 222 REAR AXLE M5640SU, M5640DT-SU, WSM ROPS Upper and Rear Wheels 1. Place the disassembling stand under the clutch housing case and transmission case. 2. Install the front axle rocking resister (refer to the "8. SPECIAL TOOLS" at "G. GENERAL" section).
Page 223: Disassembling Planetary Gear
REAR AXLE M5640SU, M5640DT-SU, WSM Rear Axle Case 1. Remove the brake rod (1) 2. Remove the differential lock rod. (If separating right side.) 3. Remove the rear axle case mounting screws and nuts. 4. Support the rear axle with nylon lift strap and hoist.
Page 224: Disassembling Rear Axle
REAR AXLE M5640SU, M5640DT-SU, WSM Planetary Gear 1. Tap the spring pin (1) into the planetary gear shaft (3). 2. Draw out the planetary gear shaft (3), and remove the planetary gear (2). 3. Tap out the spring pin from the planetary gear shaft.
Page 225: Servicing
REAR AXLE M5640SU, M5640DT-SU, WSM 5. SERVICING Backlash between Internal Gear and Planetary Gear 1. Set a dial indicator (lever type) on the tooth of the planetary gear. 2. Hold the planetary gear support and move only the planetary gear to measure the backlash.
Page 226 BRAKES KiSC issued 07, 2009 A...
Page 227 MECHANISM CONTENTS 1. STRUCTURE..........................5-M1 KiSC issued 07, 2009 A...
Page 228 BRAKES M5640SU, M5640DT-SU, WSM 1. STRUCTURE (1) Brake Shaft (4) Brake Plate (6) Spring (8) Brake Cam (2) Brake Plate (5) Cam Plate (7) Ball (9) Brake Cam Lever (3) Brake Disc These tractors are used hanging type brake pedals to have wider space of the platform.
Page 229 SERVICING CONTENTS 1. TROUBLESHOOTING.........................5-S1 2. SERVICING SPECIFICATIONS ....................5-S2 3. CHECKING AND ADJUSTING....................5-S3 [1] BRAKE PEDAL........................5-S3 4. DISASSEMBLING AND ASSEMBLING ..................5-S4 [1] BRAKE PEDAL AND LINKAGE ....................5-S4 [2] BRAKE CASE........................5-S4 (1) Separating Rear Axle Case from Transmission Case .............5-S4 5. SERVICING ..........................5-S6 [1] BRAKE PEDAL AND LINKAGE ....................5-S6 [2] BRAKE DISC AND PLATE ....................5-S6 KiSC issued 07, 2009 A...
Page 230: Troubleshooting
BRAKES M5640SU, M5640DT-SU, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Uneven Braking Brake pedal free travel unevenly adjusted Adjust 5-S3 Force Brake disc worn Replace 5-S5, 5-S7 Cam plate warped Replace 5-S5, 5-S7 Brake Drags Brake pedal free travel too small...
Page 231: Servicing Specifications
BRAKES M5640SU, M5640DT-SU, WSM 2. SERVICING SPECIFICATIONS Item Factory Specification Allowable Limit Brake Pedal Free Travel 40 to 45 mm – 1.6 to 1.8 in. Brake Pedal Shaft to Brake Pedal Bushing Clearance 0.0250 to 0.185 mm 1.00 mm 0.000985 to 0.00728 in.
Page 232: Checking And Adjusting
BRAKES M5640SU, M5640DT-SU, WSM 3. CHECKING AND ADJUSTING [1] BRAKE PEDAL Brake Pedal Free Travel CAUTION • Stop the engine and remove the key, then choke the wheel before checking brake pedal. 1. Release the parking brake. 2. Slightly depress the brake pedals and measure free travel "A"...
Page 233: Disassembling And Assembling
BRAKES M5640SU, M5640DT-SU, WSM 4. DISASSEMBLING AND ASSEMBLING [1] BRAKE PEDAL AND LINKAGE Brake Pedal and Brake Pedal Shaft 1. Remove the bonnet and rear bonnet. 2. Remove the clevis pin at the end of brake rod 1 (8). 3. Remove the return spring (4) and external snap ring (1).
Page 234 BRAKES M5640SU, M5640DT-SU, WSM Brake Shaft, Brake Disc and Brake Plate 1. Draw out the brake shaft (6) with brake disc (2). 2. Remove the external snap ring (5). 3. Remove the brake plate (1). (When reassembling) • Place the brake discs (2) so that the hole "A" of the second disc should be overlapped.
Page 235: Servicing
BRAKES M5640SU, M5640DT-SU, WSM 5. SERVICING [1] BRAKE PEDAL AND LINKAGE Clearance between Brake Pedal Shaft and Pedal Bushing 1. Measure the brake pedal shaft O.D. with an outside micrometer. 2. Measure the brake pedal bushing I.D. with a cylinder gauge.
Page 236 BRAKES M5640SU, M5640DT-SU, WSM Cam Plate Flatness 1. Place the cam plate on the surface plate. 2. Measure the flatness of cam plate with a feeler gauge at four points on a diagonal line. 3. If the measurement exceeds the allowable limit, replace it.
Page 237 FRONT AXLE KiSC issued 07, 2009 A...
Page 238 MECHANISM CONTENTS 1. STRUCTURE..........................6-M1 [1] 4 WHEEL DRIVE ........................6-M1 [2] 2 WHEEL DRIVE ........................6-M2 KiSC issued 07, 2009 A...
Page 239 FRONT AXLE M5640SU, M5640DT-SU, WSM 1. STRUCTURE The front axle supports the front of tractor and facilitates steering. There are two kinds of front axles. The two-wheel drive axle has free-running front wheels and four-wheel drive axle has powered front wheels.
Page 240 FRONT AXLE M5640SU, M5640DT-SU, WSM [2] 2 WHEEL DRIVE (1) Front Wheel Hub (7) Knuckle Shaft (12) Front Axle Support (16) Bracket (Front) (2) Slotted Nut (8) Knuckle Dust Proof Cover (13) Front Axle Bracket (17) Oil Seal (3) Taper Roller Bearing...
Page 241 SERVICING CONTENTS 1. TROUBLESHOOTING.........................6-S1 2. SERVICING SPECIFICATIONS ....................6-S2 [1] 4WD MODEL .........................6-S2 [2] 2WD MODEL .........................6-S4 3. TIGHTENING TORQUES......................6-S5 4. CHECKING AND ADJUSTING....................6-S6 5. DISASSEMBLING AND ASSEMBLING ..................6-S8 [1] SEPARATING FRONT AXLE ....................6-S8 (1) 4WD Model........................6-S8 (2) 2WD Model........................6-S9 [2] DISASSEMBLING FRONT AXLE..................6-S10 (1) 4WD Model........................6-S10 (2) 2WD Model........................6-S14 6.
Page 242: Troubleshooting
FRONT AXLE M5640SU, M5640DT-SU, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Front Wheels Wander Tire pressure uneven Adjust G-58 to Right or Left Improper toe-in adjustment (improper alignment) Adjust 6-S6 Clearance between front axle case boss and Replace...
Page 243: Servicing Specifications
FRONT AXLE M5640SU, M5640DT-SU, WSM 2. SERVICING SPECIFICATIONS [1] 4WD MODEL Item Factory Specification Allowable Limit Toe-in 2.0 to 8.0 mm – 0.079 to 0.31 in. Front Wheel Steering Angle 0.882 to 0.916 rad – 50.5 to 52.5 ° Axial Sway 5.0 mm...
Page 244 FRONT AXLE M5640SU, M5640DT-SU, WSM Item Factory Specification Allowable Limit Front Axle Case Boss (Front) to Bracket Clearance 0.120 to 0.275 mm 0.35 mm Bushing 0.00473 to 0.0108 in. 0.014 in. • Front Axle Case Boss (Front) O.D. 49.950 to 49.975 mm –...
Page 245: 2Wd Model
FRONT AXLE M5640SU, M5640DT-SU, WSM [2] 2WD MODEL Item Factory Specification Allowable Limit Toe-in 1.0 to 5.0 mm – 0.04 to 0.20 in. Front Wheel Steering Angle 0.925 to 0.960 rad – 53 to 55 ° Axial Sway Less than –...
Page 246 FRONT AXLE M5640SU, M5640DT-SU, WSM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to "5. TIGHTENING TORQUES" at "G. GENERAL" section.) [4WD] Item N·m...
Page 247: Checking And Adjusting
FRONT AXLE M5640SU, M5640DT-SU, WSM 4. CHECKING AND ADJUSTING Adjusting Toe-in 1. Park tractor on a flat place. 2. Turn steering wheel so front wheels are in the straight ahead position. 3. Lower the implement, lock the park brake and stop the engine.
Page 248 FRONT AXLE M5640SU, M5640DT-SU, WSM Front Wheel Steering Angle [4WD Model] 1. Inflate the tires to the specified pressure. 2. Steer the wheels to the extreme right until the front gear case (1) contacts with the bevel gear case (2) at right hand side of the front axle.
Page 249: Disassembling And Assembling
Front axle case oil Capacity 8.5 U.S.qts 7.0 Imp.qts NOTE • Use KUBOTA SUPER UDT fluid or SAE80, 90 gear oil. Refer to "5. LUBRICANTS, FUEL AND COOLANT" at GENERAL Section. (1) Filling Plug (3) Drain Plug (2) Breather Plug...
Page 250: 2Wd Model
FRONT AXLE M5640SU, M5640DT-SU, WSM Front Wheel and Front Axle 1. Check the front axle and engine are securely mounted on the disassembly stand. 2. Loosen the front wheel mounting nuts. 3. Lift the front axle and remove the front wheels.
Page 251: Disassembling Front Axle
FRONT AXLE M5640SU, M5640DT-SU, WSM [2] DISASSEMBLING FRONT AXLE (1) 4WD Model Tie-rod 1. Pull out the cotter pin and loosen the tie-rod end slotted nut. 2. Disconnect the tie-rod with a tie-rod end lifter (Code No. 07909-39051). (When reassembling) •...
Page 252 FRONT AXLE M5640SU, M5640DT-SU, WSM Bevel Gear and Bevel Gear Shaft 1. Remove the plug (5). 2. Remove the internal snap ring (4) and shim (3). 3. Tap out the bevel gear (2) with ball bearing. 4. Draw out the bevel gear shaft (1).
Page 253 FRONT AXLE M5640SU, M5640DT-SU, WSM Axle 1. Remove the bearing with a special use puller set (Code No. 07916-09032). 2. Take out the bevel gear (2). 3. Take out the collar (1). 4. Tap out the axle (3). (When reassembling) •...
Page 254 FRONT AXLE M5640SU, M5640DT-SU, WSM Spiral Bevel Pinion Shaft and Differential Gear Assembly 1. Take out the differential yoke shaft (9), (10) both sides. 2. Remove the oil seal (6) and internal snap ring (5). 3. Remove the collar (4).
Page 255 FRONT AXLE M5640SU, M5640DT-SU, WSM Differential Gear 1. Remove the differential case cover mounting screws (9) and then take out the differential case cover (5), ball bearing (6) and spiral bevel gear (7) as a unit. 2. Remove the external snap ring (8), and then remove the ball bearing (6) and spiral bevel gear (7) as a unit with a puller.
Page 256 FRONT AXLE M5640SU, M5640DT-SU, WSM Tie-rod 1. Pull out the cotter pin and loosen the tie-rod end nut. 2. Disconnect the tie-rod (1) with a tie-rod end lifter (2) (Code No. 07909-39051). 3. Remove the tie-rod end nut and tie-rod end.
Page 257: 4Wd Model
FRONT AXLE M5640SU, M5640DT-SU, WSM 6. SERVICING [1] 4WD MODEL Clearance between Differential Case (Differential Case Cover) and Differential Side Gear 1. Measure the differential side gear O.D.. 2. Measure the differential case bore I.D. and calculate the clearance. 3. Measure the differential case cover bore I.D. and calculate the clearance.
Page 258 FRONT AXLE M5640SU, M5640DT-SU, WSM Turning Torque of Spiral Bevel Pinion Shaft (Pinion Shaft Only) 1. Install the spiral bevel pinion shaft assembly only to the front axle case. 2. Measure the turning torque of spiral bevel pinion shaft. 3. If the turning torque is not within the factory specifications, adjust with the lock nut.
Page 259 FRONT AXLE M5640SU, M5640DT-SU, WSM Backlash and Tooth Contact between Bevel Pinion Shaft and Bevel Gear 1. Set a dial indicator (lever type) with its finger on the tooth surface. 2. Measure the backlash by fixing the bevel pinion shaft (3) and moving the bevel gear (1) by hand.
Page 260 FRONT AXLE M5640SU, M5640DT-SU, WSM Backlash between 10T Bevel Gear and 17T Bevel Gear 1. Use thick grease to attach the solder strips to the 17T bevel gear (1) at three evenly spaced locations. 2. Fix the front axle case, bevel gear case and front gear case.
Page 261 FRONT AXLE M5640SU, M5640DT-SU, WSM Clearance between Front Axle and Front Gear Case 1. Assemble the front axle (1) and 43T gear (4) and related parts with "standard" thickness of shims (5) and (6) or "original" shims (5) and (6).
Page 262 FRONT AXLE M5640SU, M5640DT-SU, WSM Backlash between 9T Bevel Gear and 43T Bevel Gear 1. Use thick grease to attach the solder strips to the 43T bevel gear (1) at three evenly spaced locations. 2. Assemble the front axle cover (6) and front gear case (7).
Page 263 FRONT AXLE M5640SU, M5640DT-SU, WSM Clearance between Front Axle Case Bosses and Bracket Bushings 1. Measure the front axle case bosses O.D. with an outside micrometer. 2. Measure the bracket bushing I.D. and calculate the clearance. 3. If the clearance exceeds the allowable limit, replace the bracket bushing.
Page 264 FRONT AXLE M5640SU, M5640DT-SU, WSM [2] 2WD MODEL Clearance between Front Axle Middle Boss and Bracket Bushing 1. Measure the front axle middle boss O.D. at several points where it contacts with the bushings. 2. Measure the front axle bracket (front) bushing I.D. and bracket (rear) bushing I.D.
Page 265 STEERING KiSC issued 07, 2009 A...
Page 266 MECHANISM CONTENTS 1. STEERING MECHANISM ......................7-M1 KiSC issued 07, 2009 A...
Page 267 STEERING M5640SU, M5640DT-SU, WSM 1. STEERING MECHANISM (1) Hydraulic Pump (3) Steering Cylinder (5) Power Steering Pipe (6) Magnet Filter (2) Steering Controller (4) Power Steering Hose All models are provided with a full hydrostatic power steering. Generally power steerings are divided into 4 types: booster type, integral type, semi-integral type and full hydrostatic type.
Page 268 SERVICING CONTENTS 1. TROUBLESHOOTING.........................7-S1 2. SERVICING SPECIFICATIONS ....................7-S2 3. TIGHTENING TORQUES......................7-S3 4. CHECKING AND ADJUSTING....................7-S4 [1] STEERING CONTROLLER....................7-S4 [2] POWER STEERING HYDRAULIC PUMP ................7-S5 5. DISASSEMBLING AND ASSEMBLING ..................7-S6 [1] REMOVING HYDRAULIC PUMP ..................7-S6 [2] STEERING CONTROLLER....................7-S6 (1) Removing Steering Controller ..................7-S6 (2) Disassembling Steering Controller ..................7-S9 [3] STEERING CYLINDER .......................7-S12 (1) Steering Cylinder (4WD Model)..................7-S12...
Page 269: Troubleshooting
STEERING M5640SU, M5640DT-SU, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Tractor Cannot Be Drive shaft in the power steering body improper Reassemble 7-S9 Steered assembled Pipe broken Replace – Hard Steering Oil improper Change with specified G-10 Hydraulic pump malfunctioning...
Page 270: Servicing Specifications
STEERING M5640SU, M5640DT-SU, WSM 2. SERVICING SPECIFICATIONS HYDRAULIC PUMP Item Factory Specification Allowable Limit Hydraulic Pump Delivery Above 17.4 L/min. Condition 21.3 L/min. 4.60 U.S.gals/min. • Engine Speed Above 3.83 Imp.gals/min. 2700 min (rpm) 5.63 U.S.gals/min. • Rated Pressure Above 16.8 MPa (170 kgf/cm...
Page 271 STEERING M5640SU, M5640DT-SU, WSM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to "6. TIGHTENING TORQUES" at GENERAL Section.) Item N·m kgf·m lbf·ft...
Page 272: Checking And Adjusting
STEERING M5640SU, M5640DT-SU, WSM 4. CHECKING AND ADJUSTING [1] STEERING CONTROLLER Relief Valve Setting Pressure 1. Disconnect the delivery hose 1 (or 2) from steering cylinder and set a pressure gauge (3) (Code No. 07916-50321) between them using power steering...
Page 273: Power Steering Hydraulic Pump
[2] POWER STEERING HYDRAULIC PUMP Hydraulic Flow Test IMPORTANT • When using a flowmeter other than KUBOTA specified flowmeter (Code No. 07916-52792), be sure to use the instructions with the flowmeter. • Do not close the flowmeter loading valve completely, before testing, because it has no relief valve.
Page 274: Disassembling And Assembling
STEERING M5640SU, M5640DT-SU, WSM 5. DISASSEMBLING AND ASSEMBLING [1] REMOVING HYDRAULIC PUMP Removing Hydraulic Pump 1. Disconnect the delivery pipe (1), (2) from the hydraulic pump (4). 2. Disconnect the suction pipe (3) from the hydraulic pump (4). 3. Remove the hydraulic pump assembly mounting screws and nuts.
Page 275 STEERING M5640SU, M5640DT-SU, WSM Rear Bonnet 1. Detach the sticker (3) then remove the screw (4). 2. Remove the rear bonnet (2). (1) Rear Bonnet (3) Sticker (2) Under Cover (4) Screw 9Y1210365STS0022US0 Piping for Power Steering 1. Disconnect the main delivery pipe (1), return pipe 1 (2), turning delivery hose (3) and turning delivery hose (4).
Page 276 STEERING M5640SU, M5640DT-SU, WSM Steering Controller 1. Remove the steering wheel (1). 2. Remove the steering post cover (2). 3. Remove the steering controller mounting screws (3). 4. Remove the steering controller (4). (When reassembling) 48 to 55 N·m Steering wheel mounting 4.9 to 5.7 kgf·m...
Page 277: Disassembling Steering Controller
STEERING M5640SU, M5640DT-SU, WSM (2) Disassembling Steering Controller Relief Valve Assembly 1. Remove the adjust plug (1) and draw out the collar (2), spring (3) and poppet (4). (When reassembling) • Take care not to damage the O-ring. IMPORTANT • After disassembling and assembling the relief valve, be sure to adjust the relief valve setting pressure.
Page 278 STEERING M5640SU, M5640DT-SU, WSM Grand Seal, Needle Bearing, Sleeve and Spool 1. Remove the retaining ring (1) with a screw driver. 2. Hold the control valve unit vertically and spool and sleeve align the cross pin parallels to flat side of housing (flow priority valve mounting side), the cross pin is visible through open end of spool.
Page 279 STEERING M5640SU, M5640DT-SU, WSM Sleeve and Spool 1. Draw out the dowel pin (1). 2. Draw out the spool (3) from the sleeve (2). 3. Push out the centering spring (4). IMPORTANT • As the clearance between the sleeve (2) and spool (3) is very narrow, draw out the spool by turning it slowly with due care.
Page 280: Steering Cylinder
STEERING M5640SU, M5640DT-SU, WSM [3] STEERING CYLINDER (1) Steering Cylinder (4WD Model) Tie-rod 1. Remove the both cylinder covers (1). 2. Disconnect the both power steering delivery hoses (2) from cylinder. 3. Remove the both hose joints (3) from steering cylinder.
Page 281 STEERING M5640SU, M5640DT-SU, WSM Steering Cylinder 1. Remove the tie-rod joint (1) (right and left). 2. Remove the nipples (2) from steering cylinder. 3. Remove the internal snap ring (3). 4. Draw out the steering cylinder to the left. (When reassembling) •...
Page 282: Steering Cylinder (2Wd Model)
STEERING M5640SU, M5640DT-SU, WSM (2) Steering Cylinder (2WD Model) Tie-rod 1. Remove the cotter pin (3) and loosen slotted nut (4). 2. Remove the tie-rod (2) with tie-rod end lifter (1) (Code No. 07909-39051). 3. Remove the slotted nut (4) and tie-rod (2).
Page 283 STEERING M5640SU, M5640DT-SU, WSM Disassembling Steering Cylinder 1. Remove the cylinder head (3) and remove the piston rod (2). (When reassembling) • Apply liquid lock (Three Bond 1901 or equivalent) to cylinder head (3). 182 to 289 N·m Tightening torque Cylinder head 18.5 to 29.5 kgf·m...
Page 284: Servicing
STEERING M5640SU, M5640DT-SU, WSM 6. SERVICING Steering Cylinder I.D. 1. Measure the steering cylinder I.D. with a cylinder gauge. [4WD Model] 55.0 mm Steering cylinder I.D. Reference 2.17 in. [2WD Model] 32.0 mm Steering cylinder I.D. Reference 1.26 in. 9Y1210365STS0017US0 Rod and Bushing 1.
Page 285 HYDRAULIC SYSTEM KiSC issued 07, 2009 A...
Page 286 MECHANISM CONTENTS 1. HYDRAULIC CIRCUIT ....................... 8-M1 2. HYDRAULIC CIRCUIT FOR THREE POINT HYDRAULIC SYSTEM ........8-M2 3. HYDRAULIC BLOCK........................8-M3 4. LINKAGE MECHANISM ......................8-M4 [1] GENERAL OUTLINE ......................8-M4 [2] POSITION CONTROL ......................8-M5 KiSC issued 07, 2009 A...
Page 287: Hydraulic Circuit
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM 1. HYDRAULIC CIRCUIT (1) PTO Clutch Valve (7) Lowering Speed Adjusting (10) Relief Valve (14) Hydraulic Pump (for Power (2) PTO Clutch Pack Valve (for 3-Point Linkage) Steering and PTO Clutch) (3) Power Steering Controller...
Page 288: Hydraulic Circuit For Three Point Hydraulic System
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM 2. HYDRAULIC CIRCUIT FOR THREE POINT HYDRAULIC SYSTEM (1) Oil Tank (Transmission Case) (5) Relief Valve (8) Hydraulic Cylinder A : To Implement Cylinder (2) Hydraulic Oil Filter Cartridge (6) Control Valve (9) Cylinder Safety Valve...
Page 289: Hydraulic Block
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM 3. HYDRAULIC BLOCK (1) Relief Valve (6) Hydraulic Rod (11) Position Control Lever (a) From Hydraulic Pump (2) Hydraulic Arm (7) Lift Arm (12) Lowering Speed Adjusting (3) Hydraulic Arm Shaft (8) Position Feedback Rod...
Page 290: Linkage Mechanism
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM 4. LINKAGE MECHANISM [1] GENERAL OUTLINE (1) Position Feedback Link (2) Position Feedback Shaft (3) Spool Drive Lever (Position) (4) Position Link 1 (5) Position Link 2 (6) Position Lever Shaft (7) Position Control Lever...
Page 291: Position Control
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM [2] POSITION CONTROL (1) Position Control Lever (5) Position Feedback Shaft (9) Position Link 2 A : Lift (2) Position Lever Shaft (6) Spool Drive Lever (10) Feedback Rod B : Down (3) Control Valve...
Page 292 SERVICING CONTENTS 1. TROUBLESHOOTING.........................8-S1 2. SERVICING SPECIFICATIONS ....................8-S2 3. TIGHTENING TORQUES......................8-S4 4. CHECKING AND ADJUSTING....................8-S5 [1] HYDRAULIC PUMP ......................8-S5 [2] RELIEF AND SAFETY VALVE ....................8-S6 (1) Relief Valve ........................8-S6 (2) Safety Valve ........................8-S7 [3] POSITION CONTROL LINKAGE ..................8-S8 5. DIASSEMBLING AND ASSEMBLING..................8-S10 [1] HYDRAULIC CYLINDER AND POSITION CONTROL VALVE...........8-S10 (1) Removing Hydraulic Cylinder Assembly................8-S10 (2) Removing Control Valve....................8-S12...
Page 293 HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM 1. TROUBLESHOOTING Reference Symptom Probable Cause Solution Page Implement Does Not Control linkage improperly assembled or Repair or replace 8-S13 Rises (Not Noise) damaged Control valve malfunctioning (unload valve, Repair or replace 8-S12 spool, check valve, poppet valve)
Page 294: Servicing Specifications
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM 2. SERVICING SPECIFICATIONS HYDRAULIC PUMP Item Factory Specification Allowable Limit Hydraulic Pump Delivery Above 31.1 L/min. Condition 38.1 L/min. 8.22 U.S. gals/min. • Engine Speed Above 6.84 Imp. gals/min. 2600 min (rpm) 10.1 U.S. gals/min.
Page 295 HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM HYDRAULIC CYLINDER Item Factory Specification Allowable Limit Spool Joint Length Joint Spool 78.80 to 79.20 mm – Mounting Screw 3.103 to 3.118 in. Cylinder Liner Bore I.D. 90.000 to 90.050 mm 90.15 mm 3.5433 to 3.5452 in.
Page 296 HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to "6. TIGHTENING TORQUES" at GENERAL Section.) Item N·m kgf·m...
Page 297: Checking And Adjusting
4. CHECKING AND ADJUSTING [1] HYDRAULIC PUMP Hydraulic Flow Test IMPORTANT • When using a flowmeter other than KUBOTA specified flowmeter (Code No. 07916-52792), be sure to use the instructions with the flowmeter. • Do not close the flowmeter loading valve completely, before testing, because it has no relief valve.
Page 298: Relief And Safety Valve
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM (Continued) Condition • Engine speed : Approx. 2600 min (rpm) • Rated pressure : 18.6 MPa (190 kgf/cm , 2700 psi) • Oil temperature : 50 to 60 °C (122 to 140 °F) Above Hydraulic pump delivery 41.6 L/min.
Page 299: Safety Valve
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM (2) Safety Valve Safety Valve Setting Pressure Test Using Injection Nozzle Tester 1. Remove the safety valve assembly (1). 2. Attach the safety valve to an injection nozzle tester with a safety valve setting adaptor (refer to "8. SPECIAL TOOLS" at "G.
Page 300: Position Control Linkage
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM [3] POSITION CONTROL LINKAGE Adjusting Uppermost Position 1. Attach the weight (1) of 490 N (50 kgf, 110 lbf) to the end of lower link (2). 2. Set the position control lever (3) to the lowest position.
Page 301 HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM Checking Floating Position 1. Attach the weight of 490 N (50 kgf, 110 lbf) to the end of lower link. 2. Set the position control lever (1) to the lowest position, and set the engine speed at the maximum.
Page 302: Diassembling And Assembling
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM 5. DIASSEMBLING AND ASSEMBLING [1] HYDRAULIC CYLINDER AND POSITION CONTROL VALVE (1) Removing Hydraulic Cylinder Assembly Lift Rods, Lower Links and Rear Wheels 1. Remove the lift rods (1), stabilizer (2) with lower link (4).
Page 303 HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM Seat Stay and Center Frame 1. Remove the PTO clutch cable (1). 2. Disconnect the connector for OPC seat switch (3). 3. Remove the seat stay (2). 4. Remove the center frame (4). (1) PTO Clutch Cable...
Page 304: Removing Control Valve
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM (2) Removing Control Valve Removing Control Valve 1. Remove the control valve mounting screws (2). 2. Remove the control valve (1). NOTE • Do not loosen adjusting section of the spool (4) unless necessary. (When reassembling) •...
Page 305: Disassembling The Linkage
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM (3) Disassembling the Linkage Position Linkage 1. Remove the position feedback rod (4). 2. Remove the feedback lever (5) after removed the roll pin (6). 3. Remove the set plate (3) mounting screw. 4. Slide the feedback shaft (2) and remove the spool drive lever (1).
Page 306: Disassembling Hydraulic Cylinder Assembly
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM (4) Disassembling Hydraulic Cylinder Assembly Hydraulic Cylinder Cover and Hydraulic Piston 1. Remove the hydraulic cylinder cover (1). 2. Push out the hydraulic piston (5) from the hydraulic cylinder. (When reassembling) • Install the hydraulic piston, noting O-ring (6) and backup ring (7).
Page 307: Removing Hydraulic Pump
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM Hydraulic Arm and Hydraulic Rod 1. Remove the spring pin (2), and separate the hydraulic arm (3) and the hydraulic rod (1). (When reassembling) • Apply grease to the joints of the hydraulic arm, hydraulic rod, set pin and piston.
Page 308: Servicing
HYDRAULIC SYSTEM M5640SU, M5640DT-SU, WSM 6. SERVICING Hydraulic Cylinder Bore 1. Check the cylinder internal surface for scoring or damage. 2. Measure the cylinder I.D. with a cylinder gauge. 3. If the measurement exceeds the allowable limit, replace it. 90.000 to 90.050 mm Factory spec.
Page 309 ELECTRICAL SYSTEM KiSC issued 07, 2009 A...
Page 310 MECHANISM CONTENTS 1. WIRING DIAGRAM........................9-M1 2. ELECTRICAL CIRCUIT DETAILED CHART ................9-M2 [1] STARTING SYSTEM AND CHARGING SYSTEM ............... 9-M2 [2] LIGHTING SYSTEM ......................9-M3 [3] METER PANEL ........................9-M4 3. INSTRUMENT PANEL ....................... 9-M5 [1] INDICATION ITEMS OF METER PANEL ................9-M5 [2] EASY CHECKER™...
Page 311: Wiring Diagram
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 1. WIRING DIAGRAM 9-M1 KiSC issued 07, 2009 A...
Page 312: Electrical Circuit Detailed Chart
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 2. ELECTRICAL CIRCUIT DETAILED CHART [1] STARTING SYSTEM AND CHARGING SYSTEM 9-M2 KiSC issued 07, 2009 A...
Page 313: Lighting System
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [2] LIGHTING SYSTEM 9-M3 KiSC issued 07, 2009 A...
Page 314: Meter Panel
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [3] METER PANEL 9-M4 KiSC issued 07, 2009 A...
Page 315: Instrument Panel
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 3. INSTRUMENT PANEL [1] INDICATION ITEMS OF METER PANEL (1) Hazard/Turn Signal Indicator (2) PTO Clutch Indicator (3) Liquid Crystal Display (4) Electrical Charge Indicator (5) Engine Oil Pressure Indicator (6) Tachometer (7) Heater Indicator...
Page 316: Lcd Monitor Indication
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [3] LCD MONITOR INDICATION (1) LCD Monitor (2) PTO/Hour Meter Select (3) Hour Meter Indication (4) PTO Indication Switch The LCD monitor (1) gives three different modes : "display mode", "setting mode" and "checking mode".
Page 317: Checking Mode
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM When Operate PTO Clutch Control Lever (At hour meter mode) • Total operating hours are displayed. • The hour meter indicates in five digits the hours the tractor has been used; the last digit indicates 1/10 of an hour.
Page 318: Opc (Operator Presence Control)
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 4. OPC (OPERATOR PRESENCE CONTROL) [1] SYSTEM OUTLINE AND ELECTRICAL CIRCUIT (1) Meter Panel (2) CPU (3) Seat Switch (4) PTO Switch (5) Buzzer (6) Transistor (A) Key Switch (B) Alternator This tractor equips operator presence control (OPC) system which automatically whistling when operator stands from the seat while engaging PTO clutch.
Page 319: Lighting System
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 5. LIGHTING SYSTEM [1] COMPONENTS (1) Flasher Unit Flasher Unit Flusher unit controls the blinking frequency as a only one side of lamp blinking of turn signal and both right and left side lamps blinking of hazard signal.
Page 320 SERVICING CONTENTS 1. TROUBLESHOOTING.........................9-S1 2. SERVICING SPECIFICATIONS ....................9-S5 3. TIGHTENING TORQUES......................9-S6 4. CHECKING, DISASSEMBLING AND SERVICING ..............9-S7 [1] BATTERY, FUSE, GROUNDING AND CONNECTOR ............9-S7 (1) Battery ..........................9-S7 (2) Checking Grounding Wires....................9-S11 (3) Connector ........................9-S11 [2] MAIN SWITCH ........................9-S11 [3] GLOW PLUG ........................9-S12 [4] STARTER..........................9-S13 [5] ENGINE STOP SOLENOID ....................9-S14 [6] ALTERNATOR ........................9-S15...
Page 321 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 1. TROUBLESHOOTING GENERAL Reference Symptom Probable Cause Solution Page All Electrical Battery discharged or defective Recharge or replace 9-S7 Equipment Do Not Battery positive cable disconnected or improperly Repair or replace – Operate connected Battery negative cable disconnected or Repair or replace –...
Page 322 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM LIGHTING SYSTEM Reference Symptom Probable Cause Solution Page Head Light Does Not Fuse blown Replace 9-S10 Light Bulb blown Replace G-35 Wiring harness disconnected or improperly Repair or replace – connected Illumination Light Fuse blown...
Page 323 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM EASY CHECKER Reference Symptom Probable Cause Solution Page Engine Oil Pressure Engine oil pressure too low Repair engine 1-S13 Lamp Lights Up Engine oil insufficient Replenish G-10 When Engine Is Engine oil pressure switch defective...
Page 324 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM ENGINE KEY SWITCH SHUT-OFF SYSTEM Reference Symptom Probable Cause Solution Page Engine Does Not Fuse blown Replace 9-S10 Stop When Main Key stop relay defective Replace 9-S29 Switch Is Turned OFF Meter panel defective Replace...
Page 325: Servicing Specifications
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 2. SERVICING SPECIFICATIONS STARTER MOTOR Item Factory Specification Allowable Limit Commutator O.D. 30.0 mm 29.0 mm 1.18 in. 1.14 in. Mica Undercut 0.50 to 0.80 mm 0.2 mm 0.020 to 0.031 in. 0.008 in. Brush Length 14.0 mm...
Page 326: Tightening Torques
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 3. TIGHTENING TORQUES Tightening torques of screws, bolts and nuts on the table below are especially specified. (For general use screws, bolts and nuts : Refer to "6. TIGHTENING TORQUES" at GENERAL Section.) Item N·m kgf·m...
Page 327: Checking, Disassembling And Servicing
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 4. CHECKING, DISASSEMBLING AND SERVICING CAUTION • To avoid accidental short circuit, be sure to attach the positive cable to the positive terminal before the ground cable is attached to the negative terminal. • Never remove the battery cap while the engine is running.
Page 328 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Checking Battery Condition DANGER • Do not use or charge the refillable type battery if the fluid level is below the LOWER (lower limit level) mark. Otherwise, the battery component parts may prematurely deteriorate, which may shorten the battery's service life or cause an explosion.
Page 329: Battery
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Battery Charging CAUTION • When the battery is being activated, hydrogen and oxygen gases in the battery are extremely explosive. Keep open sparks and flames away from the battery at all times, especially when charging the battery.
Page 330 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Directions for Storage 1. When shutting down the tractor for long periods of time, remove the battery from the tractor, store the battery in a well ventilated placed where it is not exposed to direct sunlight.
Page 331: Checking Grounding Wires
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM (2) Checking Grounding Wires Grounding Wire 1. Check the whether the grounding wire (1) is connected securely to the tractor chassis. 2. If the grounding wire is broken or disconnected, replace it. (1) Grounding Wire...
Page 332: Glow Plug
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Main Switch at ON Position 1. Turn the main switch to ON position. 2. Measure the resistance with an ohmmeter across the terminal B and the terminal M. 3. If 0 ohm is not indicated, the B – M contacts of the main switch are faulty.
Page 333: Starter
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [4] STARTER Starter Motor B Terminal Voltage 1. Measure the voltage with a voltmeter across the B terminal and chassis. 2. If the voltage differs from the battery voltage, check the battery's cable. Voltage Factory spec.
Page 334: Engine Stop Solenoid
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [5] ENGINE STOP SOLENOID Functional Check 1. Remove the engine stop solenoid (2) from the injection pump. 2. Connect the leads as shown in the figure. • Connect the jumper leads from terminal P through the switch (4) to the battery positive terminal.
Page 335: Alternator
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [6] ALTERNATOR Remove the Alternator 1. Disconnect the 2P connector (3) from alternator after turning the main switch OFF. 2. Perform the following checkings. (1) B Terminal (3) 2P Connector (2) Alternator 9Y1210365ELS0014US0 Connector Voltage 1.
Page 336: Meter Panel
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [7] METER PANEL (1) Setting Mode (Select the PTO Display Mode Switching and Tractor Model Select) CAUTION • To perform the meter panel, the operator must be seated on the tractor. 9Y1210365ELS0038US0 LCD Monitor Indication (Setting Mode) The following settings and checking can be done by using the LCD monitor (1), PTO/Hour meter select switch (2).
Page 337 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM PTO Speed Display Mode Switching (Setting Mode) 1. While pressing the PTO/Hour meter select switch (1), turn the key switch to "ON" position. The current numerical code starts flashing. 2. Each time the PTO/Hour meter select switch (1) is pressed, the code changes in the order of [1] →...
Page 338 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Model Select (Setting Mode) 1. While pressing the PTO/Hour meter select switch (1) and dummy switch (2), turn the key switch to "ON" position. The current numerical code starts flashing. 2. Each time the dummy switch (2) is pressed, the code changes in order of [1] →...
Page 339 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM (2) Checking Mode Checking Mode 1. Turn the key switch to "ON" position. 2. Press the PTO/Hour meter select switch (1) and dummy switch (2) more than 2 seconds. 3. Each time the PTO/Hour meter select switch (1) is pressed, the code number changes in order of [1] →...
Page 340: Checking Meter Panel And Pto/Hour Meter Select Switch
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM (3) Checking Meter Panel and PTO/Hour Meter Select Switch CAUTION • For checking of electric circuit, use the circuit tester. • As for the checking of sensors and switches, do the following order; check the battery, fuse and grounding line first, check by the test function of meter panel next, and check the connectors of panel or related electronic switch or sensor.
Page 341 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Connector (40P) of Wire Harness Side Terminal Color of Terminal Name Measuring across T40 (Ground) Condition wiring Heater relay Battery voltage Main switch at ON OPC buzzer Battery voltage Main switch at ON Main switch at ON and PTO/Hour...
Page 342: Switch And Sensor
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM PTO/Hour Meter Select Switch 1. Check the resistance between terminal a and terminal c while pushing the PTO/Hour meter select switch (1). 2. It is OK if 0 ohm is indicated. 3. Check the resistance between terminal b and terminal c while pushing the dummy switch (2).
Page 343 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM PTO Switch 1) Wiring Harness 1. Disconnect the leads from the PTO switch (1). 2. Connect the wiring harness lead terminals to each other and turn the main switch to "ON" position. 3. If the indicator do not light, the fuse, wiring harness or bulb is faulty.
Page 344 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Checking Fuel Level Sensor 1. Remove the fuel level sensor from the fuel tank. 2. Measure the resistance with an ohmmeter across the terminal a and terminal b. 3. If the measurement is not indicated, the sensor is faulty.
Page 345: Lighting Switches And Flasher Unit
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [8] LIGHTING SWITCHES AND FLASHER UNIT (1) Combination Switch Checking Connector Voltage 1. Disconnect the combination switch connector. 2. Measure the voltage with voltmeter across the connector terminal B1 and chassis, across the terminal B2 and chassis.
Page 346: Hazard Switch
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM (2) Hazard Switch Checking Connector Voltage 1. Connect the battery negative code, then measure the voltage with a voltmeter across the terminal a and chassis. 2. If the voltage differ from the battery voltage, the wiring harness is faulty.
Page 347: Flasher Unit
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM (3) Flasher Unit Connector Voltage 1. Disconnect the flusher unit connector. 2. Measure the voltage with voltmeter across the wiring harness connector's terminal 5 and chassis. 3. If the voltage differs from the battery voltage, the wiring harness or fuse is faulty.
Page 348: Starter Relay And Glow Relay
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [9] RELAYS (1) Starter Relay and Glow Relay Checking Connector Voltage 1. Measure the voltage with a voltmeter across the battery terminal and chassis as table below. 2. If the voltage differs from the battery voltage, the wiring harness or fuse is faulty.
Page 349 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM (2) Relays (PTO Safety, Key Stop, Work Light) Checking Connector Voltage 1. Measure the voltage with a voltmeter across the battery terminal and chassis as table below. 2. If the voltage differs from the battery voltage, the wiring harness or fuse is faulty.
Page 350: Opc (Operator Presence Control) System
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM (3) OPC (Operator Presence Control) System Checking OPC System WARNING • Disconnect the implement drive universal joint from the PTO shaft, if the implement has mounted. 1. Sit on the seat. 2. Run the engine.
Page 351: Disassembling And Assembling
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 5. DISASSEMBLING AND ASSEMBLING [1] STARTER MOTOR Disassembling Motor 1. Disconnect the connecting lead (9) from the magnet switch (8). 2. Remove the screws (6), and then separate the end frame (4), yoke (2) and armature (1).
Page 352: Alternator
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [2] ALTERNATOR Pulley 1. Secure the hexagonal end of the pulley shaft with a double-ended ratchet wrench as shown in the figure, loosen the pulley nut with a socket wrench and remove it. (When reassembling) 58.4 to 78.9 N·m...
Page 353 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Rear End Frame 1. Unscrew the two nuts and two screws holding the drive end frame and the rear end frame. 2. Remove the rear end frame (1). (1) Rear End Frame WSM000001ELS0028US0 Rotor 1. Press out the rotor (1) from drive end frame (3).
Page 354: Servicing
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM 6. SERVICING [1] STARTER MOTOR Overrunning Clutch 1. Inspect the pinion for wear or damage. 2. If there is any defect, replace the overrunning clutch assembly. 3. Check that the pinion turns freely and smoothly in the overrunning direction and does not slip in the cranking direction.
Page 355 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Brush Holder 1. Check the continuity across the brush holder and the holder support with an ohmmeter. 2. If it conducts, replace the brush holder. 9Y1210365ELS0022US0 Armature Coil 1. Check the continuity across the commutator and armature coil core with an ohmmeter.
Page 356: Alternator
ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM [2] ALTERNATOR Bearing 1. Check the bearing for smooth rotation. 2. If it does not rotate smoothly, replace it. WSM000001ELS0039US0 Stator 1. Measure the resistance across each lead of the stator coil with an ohmmeter.
Page 357 ELECTRICAL SYSTEM M5640SU, M5640DT-SU, WSM Rectifier 1. Check the continuity across each diode of rectifier with an analog ohmmeter. Conduct the test in the (R x 1) setting. 2. The rectifier is normal if the diode in the rectifier conducts in one direction and does not conduct in the reverse direction.
Page 358 EDITOR : KUBOTA FARM & INDUSTRIAL MACHINERY SERVICE, LTD. 64, ISHIZU-KITAMACHI, SAKAI-KU, SAKAI-CITY, OSAKA, 590-0823, JAPAN PHONE : ( 81 ) 72-241-1129 : ( 81 ) 72-245-2484 E-mail : ksos-pub@kubota.co.jp KUBOTA Corporation Printed in Japan 2009. 07, S, EI, EI, e...

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M5640dt-su

Kubota M5640SU Workshop Manual

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