Kubota zd 331 User Manual (English)

Questions and Answers:

A
Amy KentAug 21, 2025
Why is my Kubota zd 331 Lawn Mower engine difficult to start?
- E
  Erin SimmonsAug 21, 2025
  Your Kubota Lawn Mower engine might be hard to start due to several reasons: * No fuel flow: Check the fuel valve position, fuel tank, and fuel filter. Replace the filter if needed. * Air or water in the fuel system: Ensure the fuel line coupler bolt and nut are tight, and bleed the fuel system. * Increased oil viscosity in winter: Use oils with different viscosities depending on ambient temperatures. * Weak battery: Clean battery cables and terminals, charge the battery, and in cold weather, remove the battery, charge it, store it indoors, and install it only when the machine is in use.
R
Roger LopezAug 23, 2025
What to do if the starter does not function on my Kubota zd 331 Lawn Mower?
- J
  Justin ReyesAug 23, 2025
  If the starter on your Kubota Lawn Mower doesn't function, it might be caused by: an overused battery until lights are dim, so charge the battery sufficiently; or a poor terminal connection, so clean the terminal and tighten securely.
A
Allen AndersonAug 25, 2025
What to do if my Kubota zd 331 Lawn Mower does not move while the engine is running?
- F
  Felicia MooreAug 25, 2025
  If your Kubota Lawn Mower doesn't move while the engine is running, check if the parking brake is on and release it. Also, check if the transmission fluid level is insufficient and replenish the oil.
A
amandapenningtonAug 26, 2025
What to do if my Kubota zd 331 engine overheats?
- S
  Sarah BrownAug 26, 2025
  If your Kubota Lawn Mower engine is overheating, consider the following: * Engine overload: Lower speed or reduce load. * Low coolant level: Fill the cooling system to the correct level and check for leaks in the radiator and hoses. * Loose or defective fan belt: Adjust or replace the fan belt. * Dirty radiator core or grille screens: Remove any trash. * Corroded coolant flow route: Flush the cooling system.
T
Trevor BrownAug 27, 2025
How to fix insufficient engine power in my Kubota Lawn Mower?
- T
  Tiffany NelsonAug 27, 2025
  If your Kubota Lawn Mower has insufficient engine power, it could be due to: insufficient or dirty fuel, so check the fuel valve position and the fuel system; or a clogged air cleaner, so clean the element.
J
Joseph BrownAug 29, 2025
Why is my Kubota zd 331 Lawn Mower leaving streaks of uncut grass?
- D
  Deborah SosaAug 29, 2025
  Streaking of uncut grass with your Kubota Lawn Mower may occur due to: * Ground speed too fast: Slow down. * Engine r.p.m. too low: Mow at full throttle, check and reset engine r.p.m.. * Grass too long: Cut the grass twice. * Blades dull or damaged: Replace or sharpen the blades. * Debris in mower deck: Clean the mower deck.
J
Jacob HenryAug 31, 2025
What to do if Kubota Lawn Mower engine stops suddenly?
- J
  Jennifer MaddoxAug 31, 2025
  If your Kubota Lawn Mower engine stops suddenly, check if there is insufficient fuel. Check the fuel valve position, refuel, and bleed the fuel system if necessary.
T
Thomas SanchezSep 1, 2025
Why is my Kubota zd 331 Lawn Mower giving an uneven cut?
- L
  Lindsey ReedSep 1, 2025
  An uneven cut from your Kubota Lawn Mower can be caused by: * Mower deck not level: Level the mower deck. * Ground speed too fast: Slow down. * Blades dull: Have the blades sharpened. * Blades worn: Replace the blades. * Low tire inflation: Add air to correct pressure. * Anti-scalp rollers not adjusted correctly: Adjust the anti-scalp rollers. * Wheels pressure not adjusted correctly: Set both tire pressures to the correct pressure.
S
sheryl23Sep 3, 2025
How to fix a plugged discharge chute on my Kubota Lawn Mower?
- Y
  ygraySep 3, 2025
  A plugged discharge chute on your Kubota Lawn Mower can be caused by: * Grass being too wet: Wait for the grass to dry. * Grass being too long: Raise the cutting height and cut the grass twice. * Cutting too low: Raise the cutting height. * Engine r.p.m. being too low: Mow at full throttle. * Ground speed being too fast: Slow down.
E
Eddie BradySep 4, 2025
Why does my Kubota zd 331 Lawn Mower have excessive vibration?
- A
  Amber WoodardSep 4, 2025
  Excessive vibration in your Kubota Lawn Mower may be due to: * Debris on the mower deck or in the pulleys: Clean the mower deck and pulleys. * Damaged drive belt: Replace the drive belt. * Damaged pulleys: Replace the pulleys. * Blades out of balance: Have the blades balanced.

Kubota zd 331 Specifications

General

Style	Zero Turn
Color	Orange
Cutting Width	72 in
Cutting Height	1-5 in
Cutting Method	-
Number of Blades	-
Drive System	4×2 2WD
Case Size: U1R	12V 28Ah
Noise Level	-
Features	High Back Seat
Accessories	-
Motor / Engine Model	Kubota D1305
Power Output	31.4 PS (23.1 kW; 31.0 HP)
Cylinders	3
Generator	-
Power / Fuel Type	Diesel
Fuel Tank Volume	49.0 liters (12.9 US gal.; 10.8 Imp. gal)
SAE 5W30 (below 32°F/0°C)	-
w/o Filter: 44 oz. (1	5 Imp. qt.)

Weight and Dimensions

Depth	2335 mm
Height	1915 mm
Width	2223 mm
Net Weight	803 kg

Summary

SAFE OPERATION

BEFORE OPERATING

Read and understand safety instructions before operating the machine.

OPERATING

Guidelines for safe operation, including starting, working, and child safety.

Operators, age 60 years and above

Evaluation of ability to operate safely for older operators.

Operation on slopes

Precautions for operating the machine on slopes to prevent tip-overs.

Stopping

Procedure for safely stopping the machine and dismounting.

USING THE PTO

Instructions and safety for using the Power Take-Off (PTO) system.

USING THE LIFT LINK

Guidelines for using the lift link with authorized attachments.

TRANSPORTING

Safe procedures for transporting the machine on trailers or trucks.

SERVICING AND STORAGE

General precautions for machine servicing and storage.

Storage

Instructions for storing the machine for extended periods to maintain readiness.

DANGER, WARNING, AND CAUTION LABELS

Explanation and importance of safety labels found on the machine.

SERVICING OF MACHINE

SPECIFICATIONS

IMPLEMENT LIMITATIONS

INSTRUMENT PANEL AND CONTROLS

MOWER MOUNTING

MOUNTING THE MOWER DECK

Step-by-step instructions for attaching the mower deck to the machine.

ADJUSTING THE MOWER

Procedures for adjusting the mower deck and anti-scalp rollers.

DISMOUNTING THE MOWER DECK

Instructions for removing the mower deck from the machine.

OPERATING THE ENGINE

STARTING THE ENGINE

Steps for safely starting the engine, including pre-operation checks.

COLD WEATHER STARTING

Specific procedures for starting the engine in cold ambient temperatures.

BLOCK HEATER (OPTION)

Information about an optional block heater for cold weather starting.

WARMING UP

Procedure for warming up the engine and transmission oil.

JUMP STARTING

Instructions for safely jump-starting the machine's battery.

STOPPING THE ENGINE

Steps for safely shutting down the engine.

OPERATING THE MACHINE

OPERATING NEW MACHINE

Precautions for operating a new machine and breaking it in.

Changing Lubricating Oil for New Machines

Recommendation for changing lubricating oil earlier on new machines.

Engine Break-in

Engine oil and filter change recommendation after initial operation.

Machine Break-in

Transmission fluid and oil filter change recommendations for machine break-in.

OPERATING FOLDABLE ROPS

Instructions for safely folding and unfolding the Roll-Over Protective Structure (ROPS).

STARTING

Steps for adjusting operator position and starting the machine.

Seat Belt

Safety instructions and usage guidelines for the seat belt.

Hydraulic Lift Control Pedal

How to use the hydraulic lift control pedal to raise and lower implements.

Throttle Lever

How to operate the throttle lever to control engine speed.

Parking Brake Pedal

Procedure for locking and unlocking the parking brake pedal.

Motion Control Lever

How to operate motion control levers for machine movement and steering.

Stop position

Explanation of neutral lock and neutral positions for motion control levers.

Forward and Reverse Motion

How to move the machine forward and in reverse using motion control levers.

Re-start on the slopes

Specific procedure for safely restarting the machine on slopes.

TIRES AND WHEELS

TIRES

General information and warnings regarding tires and their maintenance.

Inflation Pressure

Recommended inflation pressures for front and rear tires.

WHEELS

Important notes regarding wheel fitting and tightening.

Remove and Install Front Caster Wheels

Step-by-step procedure for removing and installing front caster wheels.

MAINTENANCE

SERVICE INTERVALS

Schedule of servicing tasks based on machine running time intervals.

PERIODIC SERVICE CHART LABEL

Chart summarizing periodic service recommendations and intervals.

LUBRICANTS

Recommended lubricants, capacities, and greasing points for machine maintenance.

PERIODIC SERVICE

HOW TO OPEN THE HOOD, FRONT COVER & STEP

Procedures for opening the hood, front cover, and step for service access.

HOW TO RAISE THE OPERATOR'S SEAT

Instructions for raising and lowering the operator's seat.

HOW TO TILT UP THE MACHINE

Procedure for tilting the machine to allow access for maintenance.

HOW TO OPEN THE LEVER GUIDE

Instructions for opening the lever guide for access or adjustment.

LIFT-UP POINT

Designated points for lifting the machine safely for maintenance.

DAILY CHECK

Essential checks to perform before operating the machine.

Checking Engine Oil Level

Procedure for checking the engine oil level using the dipstick.

Checking Amount of Fuel and Refueling

Instructions for checking fuel level and safe refueling practices.

Checking and Cleaning Radiator Screen and Bonnet Screen to Prevent Overheating

Procedure for cleaning screens to ensure proper engine cooling and prevent overheating.

Checking Tire Pressure

Instructions for checking and maintaining correct tire inflation pressure.

Checking Transmission Fluid Level

Procedure for checking the transmission fluid level.

Checking Coolant Level

Procedure for checking the coolant level in the radiator and recovery tank.

Lubricating All Grease Fittings

Locations and procedure for greasing all grease fittings on the machine.

EVERY 50 HOURS

Maintenance tasks to be performed every 50 operating hours.

EVERY 100 HOURS

Maintenance tasks to be performed every 100 operating hours.

EVERY 150 HOURS

Maintenance tasks to be performed every 150 operating hours.

EVERY 200 HOURS

Maintenance tasks to be performed every 200 operating hours.

EVERY 400 HOURS

Maintenance tasks to be performed every 400 operating hours.

EVERY 1 YEAR

Maintenance tasks to be performed annually.

EVERY 2 YEARS

Maintenance tasks to be performed every two years.

SERVICE AS REQUIRED

Maintenance tasks that should be performed as needed.

ADJUSTMENT

MOTION CONTROL LEVER

Adjustments for the motion control lever and its linkage.

HST NEUTRAL

Procedure for adjusting the HST neutral position for proper operation.

MOTION CONTROL LEVER NEUTRAL POSITION

Steps to adjust the neutral position of the motion control levers.

MAXIMUM SPEED (FORWARD)

Consult dealer for adjustment of maximum forward speed.

MOTION CONTROL LEVER ALIGNMENT

Procedure for aligning the motion control levers for correct operation.

MOWER DECK LEVEL

Procedures for leveling the mower deck side-to-side and front-to-rear.

GENERAL TORQUE SPECIFICATION

Table of general torque specifications for cap screws.

TIGHTENING TORQUE CHART

Detailed chart for tightening torque values based on thread size.

STORAGE

REMOVING THE MACHINE FROM STORAGE

Procedure for preparing the machine after storage.

TROUBLESHOOTING

ENGINE TROUBLESHOOTING

Common engine problems, their causes, and corrective measures.

BATTERY TROUBLESHOOTING

Troubleshooting common battery issues and their solutions.

MACHINE TROUBLESHOOTING

Troubleshooting common machine operation problems.

MOWER TROUBLESHOOTING

Common mower problems, their causes, and remedies for grass cutting issues.

Related product manuals

Kubota zd 331 User Manual

Table of Contents

Questions and Answers:

Kubota zd 331 Specifications

Summary

SAFE OPERATION

BEFORE OPERATING

OPERATING

Operators, age 60 years and above

Operation on slopes

Stopping

USING THE PTO

USING THE LIFT LINK

TRANSPORTING

SERVICING AND STORAGE

Storage

DANGER, WARNING, AND CAUTION LABELS

SERVICING OF MACHINE

SPECIFICATIONS

IMPLEMENT LIMITATIONS

INSTRUMENT PANEL AND CONTROLS

MOWER MOUNTING

MOUNTING THE MOWER DECK

ADJUSTING THE MOWER

DISMOUNTING THE MOWER DECK

OPERATING THE ENGINE

STARTING THE ENGINE

COLD WEATHER STARTING

BLOCK HEATER (OPTION)

WARMING UP

JUMP STARTING

STOPPING THE ENGINE

OPERATING THE MACHINE

OPERATING NEW MACHINE

Changing Lubricating Oil for New Machines

Engine Break-in

Machine Break-in

OPERATING FOLDABLE ROPS

STARTING

Seat Belt

Hydraulic Lift Control Pedal

Throttle Lever

Parking Brake Pedal

Motion Control Lever

Stop position

Forward and Reverse Motion

Re-start on the slopes

TIRES AND WHEELS

TIRES

Inflation Pressure

WHEELS

Remove and Install Front Caster Wheels

MAINTENANCE

SERVICE INTERVALS

PERIODIC SERVICE CHART LABEL

LUBRICANTS

PERIODIC SERVICE

HOW TO OPEN THE HOOD, FRONT COVER & STEP

HOW TO RAISE THE OPERATOR'S SEAT

HOW TO TILT UP THE MACHINE

HOW TO OPEN THE LEVER GUIDE

LIFT-UP POINT

DAILY CHECK

Checking Engine Oil Level

Checking Amount of Fuel and Refueling

Checking and Cleaning Radiator Screen and Bonnet Screen to Prevent Overheating

Checking Tire Pressure

Checking Transmission Fluid Level

Checking Coolant Level

Lubricating All Grease Fittings

EVERY 50 HOURS

EVERY 100 HOURS

EVERY 150 HOURS

EVERY 200 HOURS

EVERY 400 HOURS

EVERY 1 YEAR

EVERY 2 YEARS

SERVICE AS REQUIRED

ADJUSTMENT

MOTION CONTROL LEVER