Kubota Z751KWi Operator's Manual
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Kubota Z751KWi Operator's Manual

Zero turn mower
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AX . A . 2 - 2 . - . AK
PRINTED IN U.S.A.
IMPRESO EN E.E.U.U.
Z
7
5
1
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Z
7
8
1
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English, Spanish (U.S.A.)
T
Code No.
i
K3881-7121-2
Código n°
©
KUBOTA Corporation 2018
OPERATOR'S MANUAL
MANUAL DEL OPERADOR
1SJGJ00001A01
READ AND SAVE THIS MANUAL
LEA Y CONSERVE ESTE MANUAL
MODELS
Z751KWi
MODELOS
Z781KWi
Z781KWTi

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Summary of Contents for Kubota Z751KWi

  • Page 1 English, Spanish (U.S.A.) Code No. K3881-7121-2 1SJGJ00001A01 AX . A . 2 - 2 . - . AK Código n° READ AND SAVE THIS MANUAL LEA Y CONSERVE ESTE MANUAL PRINTED IN U.S.A. © IMPRESO EN E.E.U.U. KUBOTA Corporation 2018...
  • Page 2 Miles de personas confían en el saber hacer de KUBOTA y su tecnología, experiencia y servicio al cliente. Usted también puede...
  • Page 3 OPERATOR'S MANUAL MODELS Z751KWi Z781KWi Z781KWTi 1SJGJ00001A01 READ AND SAVE THIS MANUAL...
  • Page 4 ABBREVIATION LIST Abbreviations Definitions American Petroleum Institute Feet Per Minute Hydrostatic Transmission Meters Per Second Power Take Off RH/LH Right-hand and left-hand sides are determined by facing in the direction of forward travel ROPS Roll-Over Protective Structures Revolutions Per Minute Revolutions Per Second Society of Automotive Engineers UNIVERSAL SYMBOLS...
  • Page 5 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.

  • Page 6: Table Of Contents

    2. Machine break-in ............................37 OPERATING THE FOLDABLE ROPS ........................ 38 1. Folding the ROPS............................38 2. Raising the ROPS to the upright position ....................39 3. Adjusting the foldable ROPS ........................39 STARTING THE MACHINE ..........................39 1. Operator's seat ............................40 Z751KWi,Z781KWi,Z781KWTi...
  • Page 7 4. Cleaning the engine cooling areas ......................63 5. Checking the muffler and spark arrester (if equipped)................63 EVERY 100 HOURS ............................64 1. Changing the engine oil ..........................64 2. Checking the air cleaner outer element ..................... 64 3. Checking the fuel filter ..........................65 Z751KWi,Z781KWi,Z781KWTi...
  • Page 8 5. Adjusting the mower lift pedal........................82 MOWER DECK LEVEL............................82 1. Anti-scalp rollers ............................82 2. Leveling the mower deck (side-to-side) ..................... 82 3. Leveling the mower deck (front-to-rear) ....................83 GENERAL TORQUE SPECIFICATION ......................85 TIGHTENING TORQUE CHART ........................86 Z751KWi,Z781KWi,Z781KWTi...
  • Page 9 STORAGE..........................87 STORING THE MACHINE ..........................87 REMOVING THE MACHINE FROM STORAGE....................87 TROUBLESHOOTING .......................88 ENGINE TROUBLESHOOTING ......................... 88 ELECTRONIC DEVICE TROUBLESHOOTING ....................90 BATTERY TROUBLESHOOTING........................91 MACHINE TROUBLESHOOTING ........................92 MOWER TROUBLESHOOTING......................... 93 INDEX............................95 Z751KWi,Z781KWi,Z781KWTi...

  • Page 10: Safe Operation

    • Pay special attention to the safety labels on the • Use only implements approved by KUBOTA. Use machine itself. proper ballast on the front or rear of the machine to •...
  • Page 11 2. ROPS • The ROPS is an integral and effective safety device. • KUBOTA recommends the use of a roll-over protective structure (ROPS) and seat belt in almost all applications. This combination will reduce the risk of serious injury or death, should the machine be upset.
  • Page 12 Tall grass can hide rotating if not mowing. obstacles. • Follow the manufacturer's recommendations for wheel weight or counterweights to improve stability. • Keep all movement on slopes slow and gradual. Do not make sudden changes in speed or direction. Z751KWi,Z781KWi,Z781KWTi...
  • Page 13 • This machine is not allowed to be used on public prematurely deteriorate, which may shorten the roads. battery's service life or cause an explosion. Check the fluid level regularly and add distilled water as required so that the fluid level is between the [UPPER] and [LOWER] levels. Z751KWi,Z781KWi,Z781KWTi...
  • Page 14 For your safety, do not rely on hydraulically supported devices as they may leak down, suddenly drop or be accidently lowered. • Consult your local recycling center or KUBOTA Dealer to learn how to recycle or get rid of waste products.
  • Page 15 SAFE OPERATION SAFETY LABELS Z751KWi,Z781KWi,Z781KWTi...
  • Page 16 SAFE OPERATION Z751KWi,Z781KWi,Z781KWTi...
  • Page 17 SAFE OPERATION Z751KWi,Z781KWi,Z781KWTi...
  • Page 18 SAFE OPERATION Z751KWi,Z781KWi,Z781KWTi...
  • Page 19 SAFE OPERATION Z751KWi,Z781KWi,Z781KWTi...
  • Page 20 • 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.
  • Page 21 Z751KWi,Z781KWi,Z781KWTi...

  • Page 22: Servicing Of Machine

    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 machine, ROPS, engine and mower serial numbers.

  • Page 23: 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. Z751KWi,Z781KWi,Z781KWTi...

  • Page 24: Specifications

    SPECIFICATION TABLE  SPECIFICATIONS SPECIFICATIONS SPECIFICATION TABLE Model Z751KWi Z781KWi Z781KWTi Model KAWASAKI FX730V-EFI KAWASAKI FX850V-EFI *1*2 *1*2 Max. engine power (gross) kW (HP) 19.0 (25.5) 22.0 (29.5) Type Air-cooled EFI gasoline engine Number of cylinders 2 (V-Twin) Bore and stroke mm (in.)
  • Page 25 Oil amount when the oil level is at the upper level. Model RCK48P-751Z RCK54P-781Z RCK60P-781Z Suitable machine Z751KWi Z781KWi Z781KWTi Mounting method Parallel linkage Adjustment of cutting height Dial gauge Cutting width mm (in.)

  • Page 26: Implement Limitations

     IMPLEMENT LIMITATIONS IMPLEMENT LIMITATIONS 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 27: Instrument Panel And Controls

    (32) Fuel economy mode switch ............34 (14) Hour meter..................31 (33) Engine RPM display ..............33 (15) PTO switch..................48 (34) 12 V electric power socket............. 45 (16) Fuel gauge..................31 NOTE : ™ • Items (17) to (23) correspond to the Easy Checker Z751KWi,Z781KWi,Z781KWTi...

  • Page 28: Mower

     INSTRUMENT PANEL AND CONTROLS MOWER RCK48P, RCK54P (1) Anti-scalp roller (front, bolt shift type) ........46 (2) Discharge chute (3) Step area indicator RCK60P (1) Anti-scalp roller (front, bolt shift type) ........46 (2) Discharge chute (3) Step area indicator Z751KWi,Z781KWi,Z781KWTi...

  • Page 29: Mower Mounting

    • Use a board more than 133 mm (5.25 in.) wide and 1600 mm (63.0 in.) long. • Make sure that right and left front tires are firm on the board. 5. Make sure the direction of the front tires is as shown in the figure. Z751KWi,Z781KWi,Z781KWTi...
  • Page 30 10. Remove the Φ14 mm (0.55 in.) shaft from the hole in the rear right side lift link. 11. Raise the mower deck to 76 mm (3.0 in.) or higher and attach the mower belt to the PTO clutch pulley. Z751KWi,Z781KWi,Z781KWTi...

  • Page 31: Adjusting The Mower

    • Keep all hands and feet clear of the mower links (3) Pin-1 when removing the shaft. (4) Pin-2 (5) Tension pulley (6) Idler pulley (7) Belt between the idler pulley and PTO clutch pulley (8) Belt between the tension pulley and the PTO clutch pulley Z751KWi,Z781KWi,Z781KWTi...
  • Page 32 Φ14 mm (0.55 in.) shaft from the hole in the rear right side lift link. 7. Slowly let the mower lift pedal move to the full up position. 8. Slide the mower deck from under the machine to the right side of it. Z751KWi,Z781KWi,Z781KWTi...

  • Page 33: Operating The Engine

    While keeping parking brake pedal depressed, use the right side of your right foot to depress the parking brake lock pedal. c. Release the parking brake pedal while holding down the parking brake lock pedal. Z751KWi,Z781KWi,Z781KWTi...

  • Page 34: Throttle Dial

    Apply the parking brake and turn the key switch to (C) “FORWARD” this position to start the engine. (D) “REARWARD” 5. Set the throttle dial as follows. Place the throttle dial midway between the “SLOW” and the “FAST” positions. Z751KWi,Z781KWi,Z781KWTi...

  • Page 35: Check During Operating

    Do not make further attempts to start the engine until the condition is corrected. Consult your local KUBOTA Dealer. • Do not turn the key switch to the “START” position while the engine is running. • When the temperature is below 0 ℃ (32 ℉), run...

  • Page 36: Lcd Monitor

    If this should happen during operation, check the electrical charging system or consult your local KUBOTA Dealer. (5) Engine oil pressure warning lamp If the oil pressure in the engine goes below the prescribed level, the warning lamp in the Easy ™...

  • Page 37: Normal Mode

    ● “SEr 2” memory, the display will change between ● ● “SEr 3” . To get help, contact your local KUBOTA ● ● ● “SEr 4” Dealer when these codes appear. For some error codes, the engine will enter a reduced power mode to minimize or prevent engine damage.

  • Page 38: Engine Rpm Numerical Display

    If error code is displayed, consult your local “ErrXX” (2) Engine error code KUBOTA Dealer to diagnose the problem. (See Error code mode on page 32.) 5. Safety switch status lights 4. Engine RPM numerical display When you turn the key to the “ON” position, these lights...

  • Page 39: Power Usage And Fuel Economy Monitor

    The gauge is full when you are using all of the engine power. The gauge is empty when you are using very little engine power. 6. Power usage and fuel economy monitor This machine has 2 modes of operation. Z751KWi,Z781KWi,Z781KWTi...

  • Page 40: Stopping The Engine

    Higher than 0 ℃ (32 ℉) Approximately 5 minutes backfiring. -10 to 0 ℃ (14 to 32 ℉) 5 to 10 minutes -20 to -10 ℃ (-4 to 14 ℉) 10 to 15 minutes Below -20 ℃ (-4 ℉) More than 15 minutes Z751KWi,Z781KWi,Z781KWTi...

  • Page 41: Jump Starting

    • If noises are heard after you operate the motion control levers, the hydraulic mechanism is not adjusted properly. Unless corrected, the unit will be damaged. Contact your local KUBOTA Dealer for adjustment. JUMP STARTING (1) Dead battery...

  • Page 42: Operating The Machine

    • Do not operate the mower without the discharge operator's seat before starting the engine. chute in the down position. WARNING To avoid serious injury or death: • The machine relies upon the engine driven transmission for speed, direction, and motion Z751KWi,Z781KWi,Z781KWTi...

  • Page 43: Operating The Foldable Rops

    If an interference occurs, contact your local CAUTION KUBOTA Dealer. To avoid personal injury: • Make sure that both lock pins are properly 1. Folding the ROPS installed and secured with the snap pins.

  • Page 44: Raising The Rops To The Upright Position

    6. Operate the machine. • Motion control lever on page 42 (1) Lock pin • Stop position of the motion control lever on (2) Snap pin page 42 (3) Knob bolt • Operating position of the motion control lever on page 42 Z751KWi,Z781KWi,Z781KWTi...

  • Page 45: Operator's Seat

    Suspension adjustment mower deck. Turn the suspension adjustment knob to achieve the To lock mower in top position: optimum suspension setting. 1. Set mower lock lever in “LOCK” position. To make the suspension hard, turn the suspension adjustment knob clockwise. Z751KWi,Z781KWi,Z781KWTi...

  • Page 46: Throttle Dial

    3. Release the parking brake pedal while holding (1) Mower lift pedal (P) “PUSH” down the parking brake lock pedal. 4. Release the parking brake lock pedal. Z751KWi,Z781KWi,Z781KWTi...

  • Page 47: Motion Control Lever

    Fast and sharp turns could cause the loss of “NEUTRAL” position. control. 4. To move your machine, see the following figures. • Motion control levers must be in the “NEUTRAL To stop: LOCK” position to safely enter and exit the Z751KWi,Z781KWi,Z781KWTi...
  • Page 48 Push the left motion control lever forward and pull the right motion control lever rearward at the same time. General left turn: For forward travel to the left, push the right motion control lever further forward than the left motion control lever. Z751KWi,Z781KWi,Z781KWTi...

  • Page 49: Stopping The Machine

    (If adjustment is required, see ADJUSTMENT on • Lower all implements to the ground. page 80.) • Shut off the engine. We recommend you to contact your local • Remove the key. KUBOTA Dealer. • Place motion control levers “NEUTRAL LOCK” position.

  • Page 50: Accessory

    – Make sure to lift the mower to the top position by using the mower lift pedal. • When transporting, make sure all local state and federal transport laws are met. Z751KWi,Z781KWi,Z781KWTi...

  • Page 51: Operating The Mower

    75 mm (3 in.) can be cut to a minimum of 50 mm (2 in.). 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 Z751KWi,Z781KWi,Z781KWTi...

  • Page 52: Cutting Height Reference Chart

    • Set the position for a recommended ground continuously as premature roller wear may clearance of 19 mm (0.75 in.). develop if set incorrectly. • Anti-scalp rollers must maintain a minimum clearance of 6 mm (0.25 in.) to the ground. Z751KWi,Z781KWi,Z781KWTi...

  • Page 53: Operating The Mower

    3. Engage the PTO switch. Plan your mowing carefully before starting the 4. Disengage the parking brake. operation. 5. Speed up the engine by turning the throttle dial • Keep bystanders and animals away from the clockwise. mowing area. Z751KWi,Z781KWi,Z781KWTi...
  • Page 54 • If debris builds up on the grass screen or other cooling air intake areas, stop the engine and clean them. Operating the engine with blocked or dirty air intake and cooling areas causes engine damage overheating. Z751KWi,Z781KWi,Z781KWTi...

  • Page 55: Tires And Wheels

    Even though the inflation pressure is factory-set to the several times. prescribed level, it naturally drops slowly in the course of time. Therefore, check it everyday and inflate as Rear necessary. Z751KWi, Z781KWi Recommended inflation Tire sizes pressure 13 x 6.5 - 6, (non flat) Front...

  • Page 56: Installing The Front Caster Wheels

    • Do not place your body under the machine or the mower deck while lifting the machine. • Park the machine on a firm and level surface. • Apply the parking brake. • Stop the engine and remove the key before removing the front caster wheels. Z751KWi,Z781KWi,Z781KWTi...

  • Page 57: Maintenance

    (if equipped) every 1 year Engine cooling every 100Hr / Clean ● ● ● ● ● ● areas every 1 year Combustion Clean ● ● every 300Hr chamber Valve seats and Clean ● ● every 300Hr clearance (Continued) Z751KWi,Z781KWi,Z781KWTi...
  • Page 58 This maintenance should be done daily or more often in dusty condition than in normal conditions. These items should be serviced by an authorized KUBOTA Dealer, unless the owner has the proper tools and is mechanically proficient. Replace if any deterioration or damage occurred (crack, hardening, scar, or deformation).

  • Page 59: Periodic Service Chart Label

     MAINTENANCE PERIODIC SERVICE CHART LABEL PERIODIC SERVICE CHART LABEL Z751KWi,Z781KWi,Z781KWTi...

  • Page 60: Lubricants And Fuel

    Above 0 ℃ (32 ℉)...SAE20W-50 Above -10 ℃ (14 ℉)...SAE10W-40 (recom- mended) Below 0 ℃ (32 ℉)...SAE5W-20 Transmission • Kubota HST oil for Z700 series case with filter, 6.0 L (6.3 U.S.qts.) hose and tank (RH and LH) Greasing No. of greasing points...

  • Page 61: Periodic Service

    To avoid serious injury or death: • Fully raise the operator's seat to the resting position. Do not keep the seat halfway. 1. Slide seat to rearmost position. (1) Operator's seat Lowering WARNING To avoid serious injury or death: Z751KWi,Z781KWi,Z781KWTi...

  • Page 62: Daily Check

    If either of these do To prevent trouble from occurring, it is important to not operate properly, contact know the condition of the machine. Check it before your local KUBOTA Dealer immediately. starting. Others Check the areas where pre-...

  • Page 63: Checking The Amount Of Fuel And Refueling

    • Do not mix oil with gasoline. • Tighten the fuel cap until it clicks. • Do not use a fuel cap other than one approved by KUBOTA. • Do not permit dirt, trash or water to get into the fuel system.

  • Page 64: Checking And Cleaning The Air Intake Screen

    • The air intake screen and air intake area must be clear of debris to prevent the engine from overheating. Daily or after every 5 hours of operation, make sure the air intake screen and the air intake area are clean. Z751KWi,Z781KWi,Z781KWTi...

  • Page 65: Checking The Tire Pressure

     PERIODIC SERVICE DAILY CHECK 2. Do not overfill past [MAX] line. Z751KWi, Z781KWi Oil expands with heat and may leak from cap during Recommended inflation usage if overfilled. Tire sizes pressure 13 x 6.5 - 6, (non flat) Front smooth...

  • Page 66: Cleaning Area Around Safety Switches

    • Do not allow anyone near the machine while testing. • If the machine does not pass one of the following tests, do not operate the machine. Consult your local KUBOTA Dealer. • Sit on the operator's seat for all tests except for test 1. (1) Dial cam (R) “ROTATE”...

  • Page 67: Checking The Opc System

    2. Do not set the parking brake. • If the engine cranks in tests 1 through 4, 3. Set the PTO switch to the “DISENGAGE” (OFF) consult your local KUBOTA Dealer to have the position. unit checked before operation. 4. Stand up. Do not get off the machine.

  • Page 68: Cleaning The Engine Cooling Areas

    • Replacement parts must be of the same design NOTE : and installed in the same position as the • Consult your local KUBOTA Dealer before original parts. Other parts may not perform as disassembling engine. well, may damage the unit, and may result in injury.

  • Page 69: Every 100 Hours

    (2) Plug bolt (3) Engine block 2. After all used oil has drained, reinstall the drain plug and return the hose to the hook. 3. Fill with new oil up to the upper level on the dipstick. (1) Air cleaner Z751KWi,Z781KWi,Z781KWTi...

  • Page 70: Checking The Fuel Filter

    (2) End cap (3) Retaining clips If you feel you are unable to make the following service (4) Alignment arrow correctly and safely, contact your local KUBOTA Dealer. NOTE : WARNING • Outer element cannot be cleaned with To avoid serious injury or death: compressed air.

  • Page 71: Check Brake Spring

    3. Place the motion control levers in “NEUTRAL LOCK” position and shut off the engine. 4. Check that the machine does not move. 5. If the machine moves, consult your local KUBOTA Dealer to have the unit checked before operation. Z751KWi,Z781KWi,Z781KWTi...

  • Page 72: Checking The Battery Condition

    Keep open sparks and flames away and get medical attention. from the battery at all times, especially when • Keep open sparks and flames away from the charging the battery. battery at all times. Hydrogen gas mixed with oxygen becomes very explosive. Z751KWi,Z781KWi,Z781KWTi...

  • Page 73: Storing The Battery

    Recharge it once every 3 months in the hot season NOTE : and once every 6 months in the cold season. • Consult your local KUBOTA Dealer before disassembling engine. 6. Cleaning the engine oil cooler fins 1. Remove the fan guard for better access to clean (if equipped) cooling fins.
  • Page 74 Remove the 3 bolts located on the side of the fan housing so that it can be removed. (1) Blow here 5. Reinstall all parts in the reverse order of the above procedure. NOTE : • Refer to your Kawasaki engine manual, section “COOLING SYSTEM CLEANING” for more details. Z751KWi,Z781KWi,Z781KWTi...

  • Page 75: Greasing

    3. Use a spark plug wrench to remove the spark plugs. 4. Remove plugs and check its condition. Replace the plug if worn or reuse is questionable. (1) Front mower link bushing (LH, RH) (2) Rear mower link bushing (LH, RH) Z751KWi,Z781KWi,Z781KWTi...

  • Page 76: Every 200 Hours

    22 N⋅m Tightening torque 7. Reinstall the oil fill cap and dipstick, and then 16 lbf⋅ft tighten securely. EVERY 200 HOURS 1. Replacing the engine oil filter WARNING To avoid serious injury or death: Z751KWi,Z781KWi,Z781KWTi...

  • Page 77: Replacing The Fuel Filter

    NOTE : 2. Replacing the fuel filter • Remove the expansion tank cap to speed up the draining process. Consult your local KUBOTA Dealer for this service. 3. Remove the oil filter. EVERY 250 HOURS 1. Replacing the air cleaner outer...

  • Page 78: Changing The Transaxle Fluid

    • Apply the parking brake. Before starting, make sure the transaxle is at the • Stop the engine and remove the key before proper oil level. If it is not, fill to the specifications adjusting the electric clutch. outlined in this manual. Z751KWi,Z781KWi,Z781KWTi...
  • Page 79 8. If the gap is less than 0.25 mm (0.010 in.), reinstall 1. Using a pneumatic line, blow out any debris from the shim and consult your local KUBOTA Dealer. If under the brake pole and around the aluminum gap is greater than 0.25 mm (0.010 in.), proceed to spacers.

  • Page 80: Lubricating The Crankshaft

    (See Changing the engine oil on page 64.) 3. Cleaning the engine cooling areas (See Cleaning the engine cooling areas on page 68.) 4. Checking the fuel lines WARNING To avoid serious injury or death: Z751KWi,Z781KWi,Z781KWTi...

  • Page 81: Checking The Muffler And Spark Arrester (If Equipped)

    (1) Fuel line (2) Pipe clamp (3) Fuel valve (1) Fuel line (2) Pipe clamp (3) Fuel pump 5. Checking the muffler and spark arrester (if equipped) (See Checking the muffler and spark arrester (if equipped) on page 63.) Z751KWi,Z781KWi,Z781KWTi...

  • Page 82: Checking The Hydraulic Hoses

    (3) Transaxle fluid expansion tank (LH, RH) (1) Hose clamp (LH, RH) EVERY 4 YEARS 1. Replacing the hydraulic hoses Consult your local KUBOTA Dealer for this service. 2. Replacing the fuel lines Consult your local KUBOTA Dealer for this service. Z751KWi,Z781KWi,Z781KWTi...

  • Page 83: Checking And Replacing Blades

    Check circuit against wrong battery connec- tion 2. Checking and replacing blades WARNING To avoid serious injury or death: • Be sure to stop the engine and remove the key. Z751KWi,Z781KWi,Z781KWTi...

  • Page 84: Replacing The Mower Belt

    (2) PTO clutch pulley IMPORTANT : (3) Mower belt • Tighten the blade bolts from 103 to 118 N⋅m (4) Bolt (76 to 87 lbf⋅ft). (5) Shield • The blade bolts have right hand threads. Turn them counterclockwise to loosen. Z751KWi,Z781KWi,Z781KWTi...

  • Page 85: Adjustment

    3. Move the motion control lever to the rearmost adjustments correctly and safely, contact your position and release the motion control lever. local KUBOTA Dealer. 4. After the motion control lever and damper have stopped moving, place the motion control lever in Details regarding motion control lever alignment can be the “NEUTRAL LOCK”...

  • Page 86: 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 3. Maximum speed (forward) Consult your local KUBOTA Dealer for this service. 4. Motion control lever alignment WARNING (1) Rod (A) Lever To avoid serious injury or death:...

  • Page 87: Adjusting The Mower Lift Pedal

    • Stop the engine and remove the key while checking or adjusting the level of the mower deck. WARNING To avoid serious injury or death: IMPORTANT : • Park the machine on a firm and level surface. • Check the machine tire pressure. Z751KWi,Z781KWi,Z781KWTi...

  • Page 88: Leveling The Mower Deck (Front-To-Rear)

    3. Place 51 mm (2 in.) height wood blocks under each cutting height position. side of the mower deck. 3. Lower the mower deck. Anti-scalp rollers must not rest on the wood block. 4. Position the right mower blade in the front-to-rear 4. Lower the mower deck. position. Z751KWi,Z781KWi,Z781KWTi...
  • Page 89 IMPORTANT : • The difference between both measurements should be less than 6 mm (0.25 in.). The front side must be lower than the rear side. 9. Check the front-to-rear level. If it is not level, adjustment is necessary. Z751KWi,Z781KWi,Z781KWTi...

  • Page 90: 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 Z751KWi,Z781KWi,Z781KWTi...

  • Page 91: 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 Z751KWi,Z781KWi,Z781KWTi...

  • Page 92: Storage

    Cover the machine with a vinyl tarp. 9. Moisture content in most grasses can damage the mower and grass catcher if they are not properly cleaned after use. Make sure the mower and the grass catcher are clean and completely empty before storage. Z751KWi,Z781KWi,Z781KWTi...

  • Page 93: Troubleshooting

    • Replace fuel and the fuel filter. • Water or dirt in the fuel system. • Replace fuel and consult your local KUBOTA Dealer. • Fuel hose or fuel filter clogged or damaged. • Clean or replace fuel lines and consult your lo- cal KUBOTA Dealer.
  • Page 94 Faulty spark plug. • Replace the spark plug. The LCD monitor displays an er- • Engine ECU has detected some error. • Consult your local KUBOTA Dealer. ror code “PXXXX” If you have any questions, contact your local KUBOTA Dealer. Z751KWi,Z781KWi,Z781KWTi...

  • Page 95: Electronic Device Troubleshooting

    LCD. The error code indicates the location of the trouble. If an error code appears, immediately contact your local KUBOTA Dealer for repairs. (1) Master system warning lamp (2) Error code...

  • Page 96: Battery Troubleshooting

    The battery electrolyte level drops rapid- • There is a crack or • Replace the battery. pin holes in the elec- trolytic cells. • Charging system • Contact your local trouble. KUBOTA Dealer. If you have any questions, contact your local KUBOTA Dealer. Z751KWi,Z781KWi,Z781KWTi...

  • Page 97: Machine Troubleshooting

    LCD monitor malfunction. • Replace LCD monitor. Transaxle belt is slipping. • Weak tension spring • Replace the tension spring. • Worn transaxle belt • Replace the transaxle belt. If you have any questions, contact your local KUBOTA Dealer. Z751KWi,Z781KWi,Z781KWTi...

  • Page 98: 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 99 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 82.) If you have any questions, contact your local KUBOTA Dealer. Z751KWi,Z781KWi,Z781KWTi...

  • Page 100: Index

    61 replacing..............72 checking the air intake screen.......59 fuel gauge..............31 checking the dial cam rotation strength....60 fuel lines checking the engine oil level......... 57 checking..............75 checking the tire pressure........ 50,60 replacing..............77 checking the tire pressure (warning information).. 60 Z751KWi,Z781KWi,Z781KWTi...
  • Page 101 17 working..............6 machine (new) ROPS (foldable type) changing lubricating oil..........37 adjusting..............39 changing oil filter........... 37 folding..............38 changing transaxle fluid........37 operating............... 38 operating............... 37 raising to the upright position........ 39 operating warning..........37 motion control lever.............42 adjusting (warning information)......80 Z751KWi,Z781KWi,Z781KWTi...
  • Page 102 56 switches..............22 throttle dial..............41 operating............... 29 tightening torque chart..........86 transaxle fluid changing..............73 transaxle oil filter replacing..............72 transmission oil warming up in the low temperature range.....35 valve seat and clearance adjusting..............72 cleaning..............72 warranty..............17 wheels................. 50 Z751KWi,Z781KWi,Z781KWTi...

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