Kubota Z421 Operator's Manual
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Kubota Z421 Operator's Manual

Zero turn mower
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AX . C . 5 - 5 . - . AK
PRINTED IN U.S.A.
IMPRESO EN E.E.U.U.
Z
4
1
1
·
Z
4
2
1
·
Z
4
2
English, Spanish (U.S.A.)
1
Code No.
T
K3071-7121-4
Código n°
©
KUBOTA Corporation 2016
OPERATOR'S MANUAL
MANUAL DEL OPERADOR
1SFRT00108A01
READ AND SAVE THIS MANUAL
LEA Y CONSERVE ESTE MANUAL
MODELS
Z411
MODELOS
Z421
Z421T

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  • Page 1 English, Spanish (U.S.A.) Code No. K3071-7121-4 1SFRT00108A01 AX . C . 5 - 5 . - . 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 2016...
  • 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 Z411 Z421 Z421T 1SFRT00108A01 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

    CONTENTS SAFE OPERATION........................5 SERVICING OF MACHINE ......................17 WARRANTY................................ 18 SCRAPPING THE MACHINE AND ITS PROCEDURE ..................18 SPECIFICATIONS........................19 SPECIFICATION TABLE............................. 19 IMPLEMENT LIMITATIONS.......................21 INSTRUMENT PANEL AND CONTROLS .................22 INSTRUMENT PANEL, SWITCHES AND HAND CONTROLS ................22 MOWER ................................23 MOWER MOUNTING.........................24 MOUNTING THE MOWER DECK ........................
  • Page 7 1. Electric outlet (12 volt), plug, smartphone holder, cup holder and utility box..........39 TRANSPORTING THE MACHINE........................39 1. Hydrostatic transaxle bypass rods......................39 OPERATING THE MOWER .......................41 MOWING TIPS..............................41 ADJUSTING THE CUTTING HEIGHT ........................ 41 OPERATING THE MOWER..........................43 1.
  • Page 8 1. Replacing the fuel filter ..........................63 2. Replacing the engine oil filter ........................63 EVERY 300 HOURS ............................64 1. Adjusting the engine valve clearance ......................64 2. Cleaning the combustion chamber, lapping the valve seating surface ............64 EVERY 400 HOURS ............................
  • Page 9 Z400...

  • 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 1. Starting to operate the machine device. • Always sit in the operator's seat when starting the • KUBOTA recommends the use of a roll-over engine or operating levers or controls. protective structure (ROPS) and seat belt in almost • Before starting the engine make sure that the all applications.
  • Page 12 SAFE OPERATION 4. Operators, age 60 years and older people or pets near the attachments while in operation. Data indicates that operators, age 60 years and older, Do not mow when bystanders are present in the are involved in a large percentage of machine-related mowing area.
  • Page 13 SAFE OPERATION SERVICING AND STORAGE • Use special caution when changing direction on slopes. Slow down, and use extra caution when 1. Servicing the machine changing direction on a slope. Do not • Before servicing, park the machine on a firm, level •...
  • Page 14 • Consult your local recycling center or KUBOTA required so that the fluid level is between the Dealer to learn how to recycle or get rid of waste [UPPER] and [LOWER] levels.
  • Page 15 SAFE OPERATION • 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. •...
  • Page 16 SAFE OPERATION SAFETY LABELS Z400...
  • Page 17 SAFE OPERATION Z400...
  • Page 18 SAFE OPERATION Z400...
  • Page 19 SAFE OPERATION Z400...
  • Page 20 SAFE OPERATION Z400...
  • Page 21 • 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 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: Warranty

    (1) Mower identification plate (2) Mower serial no. WARRANTY This machine is warranted under the KUBOTA Limited Express Warranty, a copy of which may be obtained from your selling dealer. No warranty shall, however, apply if the machine has not been handled according to the instructions given in the operator's manual, even if it is within the warranty period.

  • Page 24: Specifications

    SPECIFICATION TABLE  SPECIFICATIONS SPECIFICATIONS SPECIFICATION TABLE Model Z411KW Z421KW Z421KWT Model GH7302V GH7301V GH7301V *1*2 *1*2 *1*2 Max. engine power (gross) kW (HP) 16.4 (22.0) 17.9 (24.0) 17.9 (24.0) Type Air-cooled gasoline engine Number of cylinders 2 (V-Twin) Bore and stroke mm (in.) 78 x 76 (3.07 x 2.99) Total displacement...
  • Page 25  SPECIFICATIONS output will vary depending on numerous factors, including, but not limited to, the operating speed of the engine in application, environmental conditions, maintenance, and other variables. Oil amount when the oil level is at the upper level. Model RCK48-400Z RCK54-400Z RCK60-400Z Suitable machine...

  • 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

     INSTRUMENT PANEL AND CONTROLS INSTRUMENT PANEL, SWITCHES AND HAND CONTROLS INSTRUMENT PANEL AND CONTROLS INSTRUMENT PANEL, SWITCHES AND HAND CONTROLS Illustrated contents (1) Parking brake pedal…27, 38 (8) Mower lift pedal…41 (2) Parking brake lock pedal…27, 38 (9) Cutting height control dial…41 (3) Motion control lever…27, 36 (10) Key switch…29 (4) Seat belt…35...

  • Page 28: Mower

    MOWER  INSTRUMENT PANEL AND CONTROLS MOWER RCK48P, RCK54P (1) Anti-scalp roller (front, bolt (2) Discharge deflector shift type)…41 RCK60P (1) Anti-scalp roller (front, bolt (2) Discharge deflector shift type)…41 Z400...

  • Page 29: Mower Mounting

     MOWER MOUNTING MOUNTING THE MOWER DECK MOWER MOUNTING MOUNTING THE MOWER DECK WARNING To avoid serious injury or death: • Park the machine on a firm and level surface. • Apply the parking brake. • Stop the engine and remove the key. 1.

  • Page 30: Adjusting The Mower

    ADJUSTING THE MOWER  MOWER MOUNTING ADJUSTING THE MOWER 8. Raise the mower deck to 76 mm (3.0 in.) or higher. Attach the PTO belt to the PTO clutch pulley. (See OPERATING THE MOWER on page 41 and ADJUSTMENT on page 70.) DISMOUNTING THE MOWER DECK WARNING...
  • Page 31  MOWER MOUNTING 5. Put a Φ9.5 mm (0.37 in.) x 100 mm (4 in.) shaft in the hole of the front right side lift link. (1) Shaft (Φ9.5 mm x 100 mm, (3) Lift link 0.37 in. x 4 in.) (2) Clevis pin 6.

  • Page 32: Operating The Engine

    GETTING ON AND OFF THE MACHINE SAFELY  OPERATING THE ENGINE OPERATING THE ENGINE d. Release the parking brake lock pedal. WARNING To avoid serious injury or death: • Read and understand the safe operation section. • Read and understand the safety labels located on the machine.

  • Page 33: Choke Knob

     OPERATING THE ENGINE STARTING THE ENGINE (1) Parking brake pedal (3) Right foot (1) Throttle lever (B) “SLOW” (2) Parking brake lock pedal (A) “FAST” 3. Make sure that the PTO switch is in the 6. Set the choke knob to the “ON” position. “DISENGAGED”...

  • Page 34: Throttle Lever

    Do not jump start using another battery. 2. Hour meter Consult your local KUBOTA Dealer. • Do not turn the key switch to the “START” This meter indicates the number of hours the engine position while the engine is running.

  • Page 35: Cold Weather Starting

    Unless corrected, the unit 1. Pull the choke knob out (“CHOKE ON” position). will be damaged. Contact your local KUBOTA 2. Place the throttle lever midway between the Dealer for adjustment.

  • Page 36: Stopping The Engine

    STOPPING THE ENGINE  OPERATING THE ENGINE 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.

  • Page 37: Operating The Machine

     OPERATING THE MACHINE OPERATING A NEW MACHINE OPERATING THE MACHINE OPERATING A NEW MACHINE WARNING How a new machine is operated and maintained will To avoid serious injury or death: determine the operating life of the machine. • The machine relies upon the engine driven A new machine just off the factory production line has transmission for speed, direction, and motion been tested, but the various parts are not accustomed...

  • Page 38: Operating The Foldable Rops

    If an interference occurs, contact your KUBOTA CAUTION 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 39: Raising The Rops To The Upright Position

     OPERATING THE MACHINE OPERATING THE FOLDABLE ROPS 2. Raising the ROPS to the upright 3. Adjusting the foldable ROPS position 1. Adjust the free fall of the ROPS upper frame regularly. 1. Remove both snap pins and lock pins. 2. If you feel less friction when folding the ROPS, tighten the nut (1) until you feel the right friction when moving it.

  • Page 40: Operator's Seat

    STARTING THE MACHINE  OPERATING THE MACHINE 1. Operator's seat WARNING To avoid serious injury or death: • Make adjustments to the seat only while the machine is stopped. • Make sure that the seat is completely secured after each adjustment. •...

  • Page 41: Parking Brake Pedal

     OPERATING THE MACHINE STARTING THE MACHINE (1) Throttle lever (B) “DECREASE” (1) Parking brake pedal (A) “DEPRESS” (A) “INCREASE” (2) Parking brake lock pedal 6. Motion control lever 5. Parking brake pedal To apply the parking brake: WARNING 1. Depress the parking brake pedal firmly with the left To avoid serious injury or death: side of your right foot.

  • Page 42: Operating Position Of The Motion Control Lever

    STARTING THE MACHINE  OPERATING THE MACHINE (1) Motion control levers (B) “NEUTRAL” position (held by (A) “NEUTRAL LOCK” position hand) Rearward: For rearward travel in a straight line, pull both motion control levers past center rearward equally and slowly. 6.2 Operating position of the motion control lever Machine speed and steering is controlled by the motion control levers, when the engine is running and the...

  • Page 43: Stopping The Machine

    • The motion control levers are adjustable. (If adjustment is required, see ADJUSTMENT on page 70.) We recommend you to contact your local KUBOTA Dealer. STOPPING THE MACHINE WARNING To avoid serious injury or death: • Park the machine on level ground.

  • Page 44: Accessories

    ACCESSORIES  OPERATING THE MACHINE • Apply the parking brake. IMPORTANT : • Lower all implements to the ground. • Do not use the outlet as a cigarette lighter. • Shut off the engine. • Do not use the outlet or the plug when it is wet. •...
  • Page 45  OPERATING THE MACHINE TRANSPORTING THE MACHINE IMPORTANT : • Do not push the machine without pulling the bypass rods, or transmission damage may occur. • Never pull the rods with the engine running. 1. Face the machine from the rear. lift and pull the left side HST bypass rod from the “OPERATING POSITION”...

  • Page 46: Operating The Mower

    MOWING TIPS  OPERATING THE MOWER OPERATING THE MOWER MOWING TIPS the grass to grow to 80 mm (3 in.), then cut off only the top 25 mm (1 in.). 5. Clippings may be left on the lawn unless they form WARNING clumps or rows.
  • Page 47  OPERATING THE MOWER 2. To set the cutting height, push the mower lift pedal Bolt setting to raise the mower deck to the top position. Then adjust the cutting height control dial to the desired height. (1) Mower lift pedal (B) “LOWER”...

  • Page 48: Operating The Mower

    OPERATING THE MOWER  OPERATING THE MOWER OPERATING THE MOWER 2. Starting the machine WARNING DANGER To avoid serious injury or death: To avoid serious injury or death: • Engine components can get extremely hot from • Do not operate the mower without the discharge operation.

  • Page 49: Tires And Wheels

     TIRES AND WHEELS TIRES TIRES AND WHEELS TIRES WARNING To avoid serious injury or death: • Do not attempt to mount a tire. This should be done by a qualified person with the proper equipment. • Always maintain the correct tire pressure. Do not inflate tires above the recommended pressure shown in the operator's manual.

  • Page 50: Installing The Front Caster Wheels

    WHEELS  TIRES AND WHEELS • Park the machine on a firm and level surface. 2. Install the wheel bolt and the lock nut with nylon • Apply the parking brake. sleeve. • Stop the engine and remove the key before 3.

  • Page 51: Maintenance

     MAINTENANCE SERVICE INTERVALS MAINTENANCE SERVICE INTERVALS The following servicing tasks should be carried out on the machine at the stated running-time intervals. Indication hour meter (hr) Ref. Items page 100 150 200 250 300 350 400 450 500 550 600 After since 1 Engine oil Change ◎...
  • Page 52 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. Z400...

  • Page 53: Periodic Service Chart Label

     MAINTENANCE PERIODIC SERVICE CHART LABEL PERIODIC SERVICE CHART LABEL Z400...

  • Page 54: Lubricants And Fuel

    LUBRICANTS AND FUEL  MAINTENANCE LUBRICANTS AND FUEL Capacities Locations Lubricants Z411KW, Z421KW, Z421KWT • Automobile unleaded or regular gasoline Fuel tank 25.7 L (6.8 U.S. gals.) • Unleaded gasoline 87 octane or higher • Engine oil: API service Classification SF, SG, SH, SJ or SL Above 20 ℃...

  • Page 55: Periodic Service

     PERIODIC SERVICE OPENING THE STEP PERIODIC SERVICE OPENING THE STEP WARNING To avoid serious injury or death from contact with moving parts: • Never open the step while the engine is running. 1. Step 1. To open the step, use the grip to rotate the step in direction (A), then remove the step in direction (B).

  • Page 56: Checking The Engine Oil Level

    Engine start system/OPC system. If either of these do not operate properly, contact WARNING your local KUBOTA Dealer immediately. To avoid serious injury or death: • Park the machine on a firm and level surface. Others Check the areas where pre- •...

  • Page 57: Checking And Cleaning The Air Intake Screen

    • 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 58: Checking The Transaxle Fluid Level

    DAILY CHECK  PERIODIC SERVICE Dirt or chaff around the air intake screen, air intake Add new oil into the tank up to the area, or the engine cooling area decrease cooling prescribed level. performance. • Do not overfill the tank. 1.

  • Page 59: Checking The Dial Cam Rotation Strength

     PERIODIC SERVICE DAILY CHECK 7. Checking movable parts If any of the movable parts, such as levers and pedals, cannot be smoothly moved because of rust or anything sticky, do not attempt to force it into motion. In this case, remove the rust or the sticky object, and apply oil or grease on the relevant spot.

  • Page 60: Cleaning The Foam Element

    • If the machine does not pass one of the following tests, do not operate the machine. See your local KUBOTA Dealer. • Sit on the operator's seat for all tests except for test 1.

  • Page 61: Checking The Opc System

    “NEUTRAL” position and then release the levers. 5. The engine must shut off. NOTE : • If the engine keeps running in test 5, consult your local KUBOTA Dealer to have the unit checked before operation. (1) Parking brake pedal (4) PTO switch...

  • Page 62: Checking The Carbon Canister Air Filter

    • Be sure to stop the engine and remove the key • If the engine keeps running in tests 1 through 2, before greasing. consult your local KUBOTA Dealer to have the unit checked before operation. 1. Apply a small amount of multipurpose grease to the following points every 50 hours.

  • Page 63: Every 100 Hours

     PERIODIC SERVICE EVERY 100 HOURS • Remove accumulated debris from the muffler remove the oil level dipstick to allow the engine to area and cylinder area. vent. • It is a violation of California Public Resource NOTE : Code, Section 4442, to use or operate the •...

  • Page 64: Checking The Spark Plug

    EVERY 100 HOURS  PERIODIC SERVICE 3. Checking the spark plug 22 N⋅m Tightening torque 16 lbf⋅ft WARNING To avoid serious injury or death: 4. Checking the fuel filter and fuel • Park the machine on a firm and level surface. lines •...

  • Page 65: Checking The Battery Condition

     PERIODIC SERVICE EVERY 100 HOURS 2. If the fuel line, clamps and fuel filter are found damaged or deteriorated, replace them. IMPORTANT : • When the fuel line is disconnected for maintenance or repairs, close both ends of the fuel line with a piece of clean cloth or paper to prevent dust and dirt from entering.

  • Page 66: Charging The Battery

    EVERY 100 HOURS  PERIODIC SERVICE • Do not use or charge the refillable type battery Regarding non-accessible maintenance-free type if the fluid level is below the [LOWER] (lower batteries: limit level) mark. Otherwise, battery Maintenance-free, non-accessible batteries component parts may prematurely deteriorate, designed to eliminate the need to add water.

  • Page 67: Storing The Battery

     PERIODIC SERVICE EVERY 100 HOURS (1) Battery (+) Positive terminal (1) Throttle lever (B) “SLOW” (2) Ground cable Negative terminal (A) “FAST” 2. Make sure the speed control lever (2) contacts the 1. To slow charge the battery, connect the battery high idle adjustment bolt (B).

  • Page 68: Greasing Mower Link Bushings

    EVERY 100 HOURS  PERIODIC SERVICE 1. Move the choke knob to the “OFF” position. 1. Apply a small amount of multipurpose grease to the following points every 100 hours. If you operated the machine in extremely wet and muddy conditions, lubricate the bushings more often.

  • Page 69: Every 300 Hours

    5. Install the new oil filter to the filter adapter. Hand Consult your local KUBOTA Dealer for this service. tighten the filter clockwise until the rubber gasket contacts the adapter, then tighten the filter an 2.

  • Page 70: Changing The Transaxle Fluid

    EVERY 400 HOURS  PERIODIC SERVICE 12. Fill with 20W-50 motor oil until oil appears just at NOTE : the bottom of the breather port. Install the breather • Always replace the filter when performing port plug (5) into the transaxle. Torque the plug (5) any internal maintenance to the transaxle.

  • Page 71: Lubricating The Crank Shaft

     PERIODIC SERVICE EVERY 500 HOURS 2. Lubricating the crank shaft 8. Reinstall the mower belt. EVERY 500 HOURS OR EVERY WARNING 1 YEAR To avoid serious injury or death: • Park the machine on a firm and level surface. 1. Adjusting the electric clutch •...

  • Page 72: Every 1 Year

    If the air gap is too narrow, the clutch armature may drag when disengaged, resulting in premature 1. Replacing hydraulic hoses failure. Consult your local KUBOTA Dealer for this service. EVERY 1 YEAR 1. Checking fuel lines 2. Replacing fuel lines (See Checking the fuel filter and fuel lines on page 59.)

  • Page 73: Checking And Replacing Blades

     PERIODIC SERVICE SERVICE AS REQUIRED • Apply the parking brake. Capacity Fuse no. Protected circuit • Stop the engine and remove the key before replacing fuses. Start 1. Raise the operator's seat. Operator control 2. Remove the blown fuse. PTO clutch 3.

  • Page 74: Replacing The Mower Belt

    SERVICE AS REQUIRED  PERIODIC SERVICE Then turn it over to expose the blades. • The blade bolts have right hand threads. 2. Wedge a block of wood between the blade and the Turn them counterclockwise to loosen. mower housing or use a box wrench over the pulley •...

  • Page 75: 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 76: Maximum Speed (Forward)

    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 To avoid serious injury or death: • Park the machine on a firm and level surface.

  • Page 77: Adjusting The Mower Lift Pedal

     ADJUSTMENT MOTION CONTROL LEVER NOTE : • The flattest cut can be achieved by having the anti-scalp rollers adjusted off the ground. Check the anti-scalp roller adjustments each time the mower deck cutting height is changed. It is recommended that all the anti-scalp rollers be kept off the ground to minimize scuffing.

  • Page 78: Leveling The Mower Deck (Front-To-Rear)

    MOWER DECK LEVEL  ADJUSTMENT Checking the level (side-to-side) 6. Loosen the jam nuts of the right side of the machine. NOTE : 7. Adjust the cutting height fine tuning bolts to set • The mower deck anti-scalp rollers should not 76 mm (3 in.) blade height.
  • Page 79  ADJUSTMENT MOWER DECK LEVEL 5. Measure from the right front blade tip to the level surface with a short ruler or leveling gauge. 6. Turn the blade 180° and measure from the right rear blade tip to the level surface. 7.

  • Page 80: General Torque Specification

    GENERAL TORQUE SPECIFICATION  ADJUSTMENT GENERAL TORQUE SPECIFICATION American standard cap screws with UNC or UNF threads Metric cap screws GR.5 GR.8 Class 8.8 Class 10.9 SAE grade no. Property class (lbf⋅ft) 8-9.6 12-14.4 (lbf⋅ft) 7.2-8.3 (N⋅m) 10.7-12.9 16.1-19.3 (N⋅m) 9.81-11.3 (kgf⋅m) 1.11-1.33 1.66-1.99...

  • Page 81: Tightening Torque Chart

     ADJUSTMENT TIGHTENING TORQUE CHART TIGHTENING TORQUE CHART No mark Thread size d Hex. bolt head (mm) size B (mm) lbf⋅ft N⋅m kgf⋅m lbf⋅ft N⋅m kgf⋅m 13.0-15.2 17.8-20.6 1.9-2.1 17.5-20.3 23.5-27.5 2.4-2.8 12 or 13 (14.1 ± 1.1) (19.2 ± 1.4) (2.0 ±...

  • Page 82: Storage

    STORING THE MACHINE  STORAGE STORAGE grass catcher are clean and completely empty WARNING before storage. 10. Store the machine only on flat, level ground. To avoid serious injury or death: • To reduce fire hazards, allow the engine and the exhaust system to cool before storing the REMOVING THE MACHINE machine indoors or near combustible materials.

  • Page 83: 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 Kubo- ta dealer.
  • Page 84 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. Z400...

  • Page 85: 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. • Fill with oil.

  • Page 86: Mower Troubleshooting

    MOWER TROUBLESHOOTING Symptom (if) Cause Remedy Blades do not rotate. • The PTO system is not normal: • See your KUBOTA dealer. PTO system malfunctioning. • The PTO system is normal: • Replace. broken mower belt. Mower belt slipping. •...
  • Page 87 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 72.) If you have any questions, contact your local KUBOTA dealer. Z400...

  • Page 88: Index

    INDEX Symbols checking the engine oil level......... 51 checking the tire pressure........ 44,53 12 volt electric outlet (accessory)........39 checking the tire pressure (warning information).. 53 12 volt plug (accessory)..........39 checking the transaxle fluid level......53 cleaning the air intake screen....... 52 refueling..............
  • Page 89 operating position..........37 stop position............36 hand controls...............22 mower hour meter..............29 adjusting..............25 hydraulic hoses operating............... 43 checking..............67 troubleshooting............81 replacing..............67 type............... 23 hydrostatic transaxle bypass rods.......39 mower belt replacing..............69 mower deck dismounting............25 implement limitations...........21 front-to-rear leveling..........73 instrument panel............22 mounting............... 24 side-to-side leveling..........
  • Page 90 transporting the machine.........8 working the machine..........6 safety for children............7 safety for operators (age 60 years and older)....7 seat belt...............35 service intervals............46 smartphone holder (accessory)........39 spark arrester (if equipped) checking............57,67 spark plug checking..............59 replacing..............65 step opening..............50 switches..............

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