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Summary of Contents for Kubota Z231KW-AU
- Page 1 OPERATOR'S MANUAL MODEL Z231KW-AU 1WJLE00001A01 English (Australia) AY . A . 2 - 2 . - . AK Code No. K3004-7125-1 READ AND SAVE THIS MANUAL © KUBOTA Corporation 2019 PRINTED IN U.S.A.
- Page 2 ABBREVIATION LIST KUBOTA Corporation is ··· Abbreviations Definitions Since its inception in 1890, KUBOTA Corporation has grown to American Petroleum Institute rank as one of the major firms in Japan. Power Take Off To achieve this status, the company has through the years...
- Page 3 FOREWORD You are now the proud owner of a KUBOTA ZERO TURN MOWER. This machine is a product of KUBOTA's quality engineering and manufacturing. It is made of excellent materials and under a rigid quality control system. It will give you long, satisfactory service.
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Page 4: Table Of Contents
7.1 Stop position of the motion control lever .................... 32 7.2 Operating position of the motion control lever..................32 STOPPING THE MACHINE..........................33 PARKING THE MACHINE ..........................34 TRANSPORTING THE MACHINE........................34 1. Hydrostatic transaxle bypass rods......................34 OPERATING THE MOWER .......................36 Z231KW-AU... - Page 5 3. Checking the muffler and spark arrester (if equipped)................56 4. Replacing spark plug ..........................56 5. Checking engine valve clearance ......................56 EVERY 4 YEARS..............................56 1. Replacing fuel lines ........................... 56 SERVICE AS REQUIRED........................... 56 1. Replacing fuses ............................56 Z231KW-AU...
- Page 6 GENERAL TORQUE SPECIFICATION ......................64 TIGHTENING TORQUE CHART ........................65 STORAGE..........................66 STORING THE MACHINE ..........................66 REMOVING THE MACHINE FROM STORAGE....................66 TROUBLESHOOTING .......................67 ENGINE TROUBLESHOOTING ......................... 67 BATTERY TROUBLESHOOTING........................69 MACHINE TROUBLESHOOTING ........................69 MOWER TROUBLESHOOTING......................... 70 INDEX............................72 Z231KW-AU...
- Page 7 Z231KW-AU...
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Page 8: Safe Operation
• Use only implements approved by KUBOTA. Use Practice operating the machine at low engine speed proper ballast on the front or rear of the machine to in an unobstructed area without engaging the reduce the risk of upsets. - Page 9 (See Checking the engine start system on page 46 and Checking the OPC system on page 47.) • KUBOTA recommends the use of a roll-over Do not operate unless they are functioning protective structure (ROPS) and seat belt in almost correctly.
- Page 10 • Remove obstacles such as rocks and tree limbs. machine into a trailer or truck. • Stay alert for holes in the terrain and other hidden • This machine is not allowed to be used on public hazards. Keep away from drop-offs. Uneven terrain roads. Z231KW-AU...
- Page 11 [LOWER] (lower limit level) down, suddenly drop or be accidently lowered. mark. Otherwise, the battery component parts may • Consult your local recycling center or KUBOTA prematurely deteriorate, which may shorten the Dealer to learn how to recycle or get rid of waste battery's service life or cause an explosion.
- Page 12 • To avoid the danger of exhaust fume poisoning, do not operate the engine indoors without adequate ventilation. • To reduce fire hazards, clean the machine thoroughly before storage. Dry grass and leaves around the engine and muffler may ignite. Z231KW-AU...
- Page 13 SAFE OPERATION SAFETY LABELS Z231KW-AU...
- Page 14 SAFE OPERATION Z231KW-AU...
- Page 15 SAFE OPERATION Z231KW-AU...
- Page 16 SAFE OPERATION Z231KW-AU...
- Page 17 • Clean safety labels with soap and water, and dry with a soft cloth. • Replace damaged or missing safety labels with new labels from your local KUBOTA Dealer. • If a component with safety label(s) attached is replaced with a new part, make sure new label(s) is (are) attached in the same location(s) as the replaced component.
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Page 18: Servicing Of Machine
However, when in need of parts or major service, be sure to consult your local KUBOTA Dealer. When in need of parts, be prepared to give your dealer the product identification number (PIN)/serial number, and the ROPS, engine and mower serial numbers. -
Page 19: Scrapping The Machine And Its Procedure
SCRAPPING THE MACHINE AND ITS PROCEDURE To put the machine out of service, correctly follow the local rules and regulations of the country or territory where you scrap it. If you have questions, consult your local KUBOTA Dealer. Z231KW-AU... -
Page 20: Specifications
SPECIFICATION TABLE SPECIFICATIONS SPECIFICATIONS SPECIFICATION TABLE Model Z231KW-AU Model name Kawasaki GH739V *1*2 Max. engine power (gross) kW(HP) 16.0 (21.5) Type Air-cooled gasoline engine Number of cylinders 2 (V-Twin) Bore and stroke mm (in.) 78 × 76 (3.07 × 2.99) Total displacement (cu. - Page 21 SPECIFICATIONS Oil amount when the oil level is at the upper level. Model RCK42P-122Z Suitable machine Z231KW-AU Mounting method Parallel linkage Adjustment of cutting height Dial gauge Cutting width mm (in.) 1067 (42) Cutting height mm (in.) 38.1 to 108 (1.5 to 4.25) Weight (approximation) kg (lbs.)
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Page 22: Implement Limitations
IMPLEMENT LIMITATIONS TERMS OF USE The KUBOTA Machine has been thoroughly tested for proper performance with implements sold or approved by KUBOTA. Use with implements below may result in malfunctions or failures of the machine, damage to other property and injury to the operator or others. -
Page 23: Instrument Panel And Controls
(7) Mower lift pedal........31 (13) Light switch (if equipped) ......30 Motion control lever ........ 31 (8) Cutting height control dial ....... 36 (14) Choke knob..........25 (3) Seat belt..........30 (9) Key switch..........25 (4) Cup holder (10) Hour meter..........27 Z231KW-AU... -
Page 24: Mower
MOWER INSTRUMENT PANEL AND CONTROLS MOWER Illustrated contents (1) Anti-scalp roller (front, bolt shift type) ........36 (2) Discharge deflector..............29 Discharge deflector..............37 Z231KW-AU... -
Page 25: Mower Mounting
• Check to see that the mower belt is attached hardware. to the pulleys. Make sure that the longer hook of the spring is set to the pulley side. (1) Lift link (P) Out side (2) Clevis pin (3) Snap ring Z231KW-AU... -
Page 26: Adjusting The Mower
8. After mounting the mower, check the mower level. If necessary, adjust the mower level and anti-scalp rollers. ADJUSTING THE MOWER (See OPERATING THE MOWER on page 36 and ADJUSTMENT on page 59.) DISMOUNTING THE MOWER DECK For dismounting the mower deck, reverse the above procedures. Z231KW-AU... -
Page 27: Operating The Engine
(1) PTO switch (A) “ENGAGED” (ON) (B) “DISENGAGED” (OFF) STARTING THE ENGINE 1. Sit on the operator's seat. 2. Apply the parking brake. To apply the parking brake: Place the parking brake lever in the “ENGAGED” position. Z231KW-AU... -
Page 28: Choke Knob
6. Set the choke knob to the “ON” position. turned to this position, the engine shuts off. The engine keeps running. START Apply the parking brake and turn the key switch to this position to start the engine. (1) Choke knob (P) “PULL” (ON) (Q) “PUSH” (OFF) Z231KW-AU... -
Page 29: Stopping The Engine
Do not jump start using another backfiring. battery. Consult your local KUBOTA Dealer. CHECK DURING OPERATING • Do not turn the key switch to the “START” position while the engine is running. -
Page 30: Hour Meter
Hydraulic oil serves as transmission oil. In cold weather conditions, the oil may be cold with increased viscosity. This can cause delayed oil circulation or abnormally low hydraulic pressure for some time after engine start- up. This, in turn, can create problems with the hydraulic system. Z231KW-AU... -
Page 31: Jump Starting
7. Clamp the other end to the engine block or the frame of the disabled machine as far from the dead battery as possible. 8. Start the helper vehicle and let its engine run for a few moments. Start the disabled machine. Z231KW-AU... -
Page 32: Operating The Machine
• The machine relies upon the engine driven transmission for speed, direction, and motion WARNING control. If the engine is not running, the To avoid serious injury or death: machine cannot be driven or controlled. • Read and understand the safe operation section. Z231KW-AU... -
Page 33: Operator's Seat
• Do not allow anyone other than the driver to 3. Light switch (if equipped) ride on the machine. To turn on the headlights: Push the light switch forward. To turn off the headlights: Push the light switch rearward. (1) Fore-aft adjusting handle Z231KW-AU... -
Page 34: Mower Lift Pedal
• Do not move motion control levers from the “FORWARD” to “REARWARD” or from the “REARWARD” to “FORWARD” position rapidly. Sudden direction changes could cause the loss of control or damage to the machine or property. • Do not make sharp turns at high speed. Z231KW-AU... -
Page 35: Stop Position Of The Motion Control Lever
Grasp the motion control levers and move them inward from the “NEUTRAL LOCK” position so that the machine is in “NEUTRAL” (the engine cannot be restarted). Forward and rearward motion: 1. Move the throttle lever to the “FAST” position. 2. Release the parking brake. Z231KW-AU... -
Page 36: Stopping The Machine
• The motion control levers are adjustable. (If adjustment is required, see ADJUSTMENT on page 59.) We recommend that you contact your local KUBOTA Dealer. STOPPING THE MACHINE Sharp (zero) left turn: WARNING Push the right motion control lever forward and pull the To avoid serious injury or death: left motion control lever rearward at the same time. -
Page 37: Parking The Machine
If necessary to park on an incline, be sure to chock the wheels on the downhill side to prevent accidental rolling of the machine. (1) Left side HST bypass rod (A) Operating position (B) Bypass position (1) Chock Z231KW-AU... - Page 38 (1) Right side HST bypass rod (A) Operating position (B) Bypass position (H) “HOLD” 3. After moving, place both the right side and left side HST bypass rod back into the “OPERATING POSITION” hole. Z231KW-AU...
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Page 39: Operating The Mower
For extremely tall grass, set the cutting height at maximum cutting height for the first mowing, then reset to the desired height and mow again. Allow the grass to grow to 80 mm (3 in.), then cut off only the top inch. Z231KW-AU... -
Page 40: Operating The Mower
• Do not direct the opening of the discharge deflector at bystanders, especially children, or animals. Discharged objects may cause injury. Plan your mowing carefully before starting the operation. • Keep bystanders and animals away from the mowing area. Z231KW-AU... -
Page 41: Pto Switch
1. Sit on the operator's seat. Put on the seat belt. Make sure that the parking brake is engaged. 2. Start the engine. 3. Engage the PTO switch. 4. Disengage the parking brake. 5. Speed up the engine by moving the throttle lever forward. Z231KW-AU... -
Page 42: Tires And Wheels
1. Park the machine on a firm and level surface. (1) Ground (A) “INSUFFICIENT” 2. Stop the engine and apply parking brake. (B) “NORMAL” (C) “EXCESSIVE” 3. Lift the front of machine with a safe lifting device. 4. Remove the nut and the wheel bolt. Z231KW-AU... -
Page 43: Installing The Front Caster Wheels
(36 to 41 lbf⋅ft) (4.9 to 5.7 kgf⋅m) 4. Lower the machine. IMPORTANT : • Make sure that a washer is set on wheel bolt side. (1) Nut (A) Front wheel (2) Wheel bolt (3) Yoke (4) Washer (5) Cap with felt Z231KW-AU... -
Page 44: Maintenance
This maintenance should be done daily or more often in dusty condition than in normal conditions. The initial 8 hours oil change is not the scheduled maintenance cycle. Consult your local KUBOTA Dealer for this service. Replace if any deterioration (crack, hardening, scar, or deformation) or damage occurred. -
Page 45: Lubricants And Fuel
See the Emissions Warranty Statement. – To ensure the best quality and reliability, use new KUBOTA genuine parts or their equivalents for repairs and replacement, whenever you have maintenance done. LUBRICANTS AND FUEL... -
Page 46: Periodic Service
To avoid serious injury or death: Parking brake － seat • Do not drop the seat when lowering it. Other movable parts • Watch your hands. Do not place your hands under the seat when lowering it. (Continued) Z231KW-AU... -
Page 47: Checking The Engine Oil Level
If the engine is not operate properly, contact hot, let the engine cool down several minutes your local KUBOTA Dealer before adding fuel. immediately. • Do not smoke while filling the fuel tank or... -
Page 48: Checking And Cleaning The Air Intake Screen
• Do not use a fuel cap other than one approved overheating. by KUBOTA. • Do not permit dirt, trash or water to get into the Daily or after every 5 hours of operation, make sure the fuel system. -
Page 49: Checking The Tire Pressure
• If the machine does not pass one of the following tests, do not operate the machine. IMPORTANT : Consult your local KUBOTA Dealer. • Do not use tires larger than specified. • Sit on the operator's seat for all tests except for test 1. -
Page 50: Checking The Opc System
Test 1 (operator on the seat) • If the engine cranks in tests 1 through 4, 1. Start the engine. consult your local KUBOTA Dealer to have the 2. Do not set the parking brake. unit checked before operation. 3. Set the PTO switch to the “DISENGAGE” (OFF) position. -
Page 51: Every 100 Hours
(B) “LOWER LEVEL” 3. To check the oil level: Remove the dipstick, wipe it clean, insert it and draw it out again. Check to see that the oil level is between the 2 marks. NOTE : • Do not overfill. Z231KW-AU... -
Page 52: Cleaning The Air Cleaner Paper Element
To avoid serious injury or death: • Make sure the engine is cool to the touch before removing shrouds. • Always shield eyes and face from air deposits and objects. 1. Remove the engine shroud mounting bolts and detach the shroud. Z231KW-AU... -
Page 53: Checking The Spark Plug
3. Inspect the spark plug for cracked porcelain, pitted electrodes, or other wear and damage. Replace the spark plug if necessary. (1) Spark plug (both sides) 4. Check the spark plug gap with a gap gauge. Recommended spark plug NGK BPR4ES Z231KW-AU... -
Page 54: Checking The Battery Condition
[UPPER] and [LOWER] levels. • 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. Z231KW-AU... -
Page 55: Charging The Battery
When using a boost-charged battery, it is necessary to recharge the battery as early as possible. Failure to do this will shorten the battery's service life. Z231KW-AU... -
Page 56: Storing The Battery
Make sure that the carburetor throttle valve is carburetor choke valve is fully opened. moved smoothly. 3. Pull up the sheath (3) of the choke cable until the inner wire of the choke cable has almost no slack, and tighten the cable clamp bolt (A). Z231KW-AU... -
Page 57: Every 200 Hours
Allow a few minutes or 2 for the oil to be absorbed by the filter material. 6. Apply a thin film of clean oil to the rubber gasket on the new oil filter. Z231KW-AU... -
Page 58: Every 300 Hours
3. Replace a dirty, bent, or damaged element with a genuine part. Handle the new element carefully; do Consult your local KUBOTA Dealer for this service. not use if the sealing surfaces are bent or damaged. EVERY 500 HOURS 1. -
Page 59: Every 1 Year
4. Replacing spark plug (See Checking the spark plug on page 50.) 5. Checking engine valve clearance Consult your local KUBOTA Dealer for this service. EVERY 4 YEARS 1. Replacing fuel lines Consult your local KUBOTA Dealer for this service. -
Page 60: Checking And Replacing Blades
Mower deck cleaning • Before checking or replacing the blades, wipe grass (1) Block (A) “LOOSEN” and mud off the top and inside of the mower. Z231KW-AU... -
Page 61: Replacing The Mower Belt
Turn them counterclockwise to loosen. • To prolong the service life of the blades, reposition them as shown in the following figure periodically. (1) LH blade (2) RH blade 3. Replacing the mower belt 1. Remove the mower deck from the machine. Z231KW-AU... -
Page 62: Adjustment
• If you feel you are unable to make the following (3) Bolt (front) adjustments correctly and safely, contact your (4) Bolt (rear) local KUBOTA Dealer. Left hand side Details regarding motion control lever alignment can be found in a different section. -
Page 63: Maximum Speed (Forward)
23.6 to 27.4 N⋅m Tightening torque (2.4 to 2.8 kgf⋅m, 17.4 to 20.2 lbf⋅ft) 2. Maximum speed (forward) Consult your local KUBOTA Dealer for this service. 3. Motion control lever alignment (1) Bolt (A) Low position (2) Flange nut (3) Tab slot... -
Page 64: Leveling The Mower Deck (Side-To-Side)
10. Check the side-to-side level. If it is not level, 4. Position the right mower blade in the side-to-side adjustment is necessary. position. 5. Measure from outside the blade tip to the level surface with a short ruler or leveling gauge. Z231KW-AU... -
Page 65: Leveling The Mower Deck (Front-To-Rear)
7. Check that the left side blade has the same dimensions. difference between both measurements should be less than 6 mm (0.25 in.). The front side must be lower than the rear side. 8. If the front-to-rear adjustment is not within the given tolerance, adjustment is necessary. Z231KW-AU... - Page 66 MOWER DECK LEVEL ADJUSTMENT (1) Cutting height fine tuning bolt (2) Jam nut Z231KW-AU...
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Page 67: General Torque Specification
7.9-9.2 10.5-12.0 (lbf⋅ft) 110-132 160-192 (lbf⋅ft) 91.2-108 123-144 9/16 (N⋅m) 149.2-179.0 217.0-260.4 (N⋅m) 124-147 167-196 (kgf⋅m) 15.22-18.27 22.14-26.57 (kgf⋅m) 12.6-15.0 17.0-20.0 (lbf⋅ft) 150-180 220-264 (lbf⋅ft) 145-166 192-224 (N⋅m) 203.4-244.1 298.3-358.0 (N⋅m) 196-225 260-303 (kgf⋅m) 20.75-24.91 30.44-36.53 (kgf⋅m) 20.0-23.0 26.5-31.0 Z231KW-AU... -
Page 68: Tightening Torque Chart
(135.3 ± 11.7) (13.8 ± 1.2) NOTE : • Figure [7] on the top of the bolt indicates that the bolt is made of special material. • Before tightening, check the figure on top of the bolt. (1) Scale Z231KW-AU... -
Page 69: Storage
Run the engine for 2 to 3 minutes to get stabilized fuel into the carburetor. IMPORTANT : • Allow engine and muffler to cool down sufficiently. Then drain carburetor. • If a spill of fuel should occur, wipe it off at once securely. Z231KW-AU... -
Page 70: Troubleshooting
Replace fuel and the fuel filter. • Water or dirt in the fuel system. • Replace fuel and see your KUBOTA Dealer. • Fuel hose or fuel filter clogged or damaged. • Clean or replace fuel lines and see your KU- BOTA Dealer. - Page 71 Spark plug damaged. • Adjust the spark plug gap or replace it. • Faulty spark plug. • Replace the spark plug. • Carburetion problem. • See your KUBOTA Dealer. If you have any questions, contact your local KUBOTA Dealer. Z231KW-AU...
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Page 72: Battery Troubleshooting
• Charging system • Contact your local trouble. KUBOTA Dealer. If you have any questions, contact your local KUBOTA Dealer. MACHINE TROUBLESHOOTING Symptom (if) Cause Remedy The machine operation is not • The hydrostatic transaxle fluid is insufficient. • Contact your local KUBOTA Dealer. -
Page 73: Mower Troubleshooting
MOWER TROUBLESHOOTING Symptom (if) Cause Remedy Blades do not rotate. • The PTO system is not normal: • Consult your local KUBOTA Dealer. PTO system malfunctioning. • The PTO system is normal: • Replace. broken mower belt. Mower belt slipping. - Page 74 Slow down. • Debris wrapped around mower spindles. • Clean the mower. • Front of deck too low. • Adjust the mower deck. (See MOWER DECK LEVEL on page 60.) If you have any questions, contact your local KUBOTA Dealer. Z231KW-AU...
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Page 75: Index
43 Light switch..............30 lubricants..............42 electric clutch adjusting..............55 engine jump starting............28 machine operating (warning information)......24 before operating............5 starting..............24 getting off.............. 24 starting in cold weather......... 27 getting on.............. 24 starting information..........25 operating on slopes..........7 stopping..............26 Z231KW-AU... - Page 76 22 side-to-side leveling..........61 mower lift pedal............31 warranty..............15 mowing tips..............36 wheels................. 39 muffler checking............47,56 OPC system checking..............47 operator's seat.............30 lowering..............43 raising..............43 parking brake applying..............24 releasing..............24 parking brake lever............31 Z231KW-AU...
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How much oil for z231 lawn mower
42 inch blade
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