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Kubota M108S - User Manual

Kubota M108S
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M108SMODEL
OPERATOR'S MANUAL
1AGAIIJAP0010
English (Oceania)
Code No. 3N606-9971-1
M
1
0
8
S
©
KUBOTA Corporation 2010
READ AND SAVE THIS MANUAL
PRINTED IN JAPAN
1110-0598

Table of Contents

Other manuals for Kubota M108S

Questions and Answers

  • A
    Amanda PittsSep 7, 2025
    What to do if my Kubota M108S Tractor starter does not run?
    • F
      fklineSep 7, 2025
      If the starter on your Kubota Tractor isn't running, it could be due to a discharged battery (charge or replace), a malfunctioning starter (repair or replace), a malfunctioning key switch (replace), or disconnected wiring (connect).
  • N
    Nicole VillarrealNov 23, 2025
    Why is my Kubota M108S Tractor engine not starting?
    • D
      deborahcoxNov 23, 2025
      Several factors can prevent your Kubota Tractor engine from starting. It could be due to no fuel, which means you should replenish the fuel. Alternatively, there might be air or water in the fuel system, requiring you to vent the air or drain the water. Other potential causes include a malfunctioning electric fuel feed pump (replace it), a clogged fuel hose (clean or replace it), or a clogged fuel filter (replace it). The issue might also stem from excessively high viscosity of fuel or engine oil at low temperature, in which case you should use the specified fuel or engine oil. Using fuel with a low cetane number also can cause this problem, so use the specified fuel. Other causes could be: fuel leak due to loose injection pipe retaining nut (tighten retaining nut); injector clogged (repla...
  • J
    Joseph HernandezNov 19, 2025
    Why is my Kubota Tractor engine difficult to start?
    • A
      Amy CarrNov 19, 2025
      Several factors can cause a Kubota Tractor engine to be difficult to start. It could be due to no fuel flow, so check the fuel tank and fuel filter, replacing the filter if needed. Air or water in the fuel system could also be the problem; ensure the fuel line coupler bolt and nut are tight. In cold weather, the oil viscosity may increase, slowing the engine revolution; use oils with different viscosities depending on ambient temperatures and consider using an engine block heater. A weak battery can also prevent the engine from turning over quickly enough; clean the battery cables and terminals, charge the battery, and in cold weather, remove the battery, charge it, and store it indoors until use. Lastly, there could be an issue with the intake air heater system; check the slow blow fuse a...
  • A
    Andrew MartinSep 18, 2025
    What to do if water mixed into engine oil in my Kubota M108S?
    • A
      Abigail BuchananSep 18, 2025
      If water is mixed into the engine oil in your Kubota Tractor, it could be due to a defective head gasket (replace) or a flawed cylinder block or cylinder head (replace).
  • N
    Nicole LambertSep 16, 2025
    What to do if fuel mixed into engine oil in my Kubota M108S Tractor?
    • R
      Roger ChangSep 16, 2025
      If fuel is mixed into the engine oil of your Kubota Tractor, it could be due to deficient injection (replace injector) or a fuel leak from the overflow pipe inside of cylinder head cover (replace the gasket).
  • M
    Megan DavisSep 14, 2025
    What causes oil leak into exhaust pipe or suction pipe in Kubota M108S Tractor?
    • N
      njohnsonSep 14, 2025
      Oil leaking into the exhaust pipe or suction pipe of your Kubota Tractor could be due to a waste oil pipe clogged or deformed (repair or replace) or a faulty turbocharger’s piston ring seal (replace the turbocharger assembly).
  • S
    Sydney NelsonSep 12, 2025
    What causes high oil pressure in my Kubota M108S?
    • M
      Matthew WatkinsSep 12, 2025
      High oil pressure in your Kubota Tractor could be due to using a different type of oil (use specified oil) or a defective relief valve (replace).
  • N
    Norma JacksonSep 12, 2025
    What to do if my Kubota M108S has low oil pressure?
    • H
      Heidi RogersSep 12, 2025
      If your Kubota Tractor is experiencing low oil pressure, it could be due to several reasons: insufficient engine oil (replenish), a clogged oil strainer (clean), a relief valve stuck with foreign matter (clean), or a relief valve spring that is weak or broken (replace). Other potential causes include excessive oil clearance of the crankshaft bearing (replace), excessive oil clearance of the crankpin bearing (replace), excessive oil clearance of the rocker arm (replace), a clogged oil passage (clean), using a different type of oil (use specified type of oil), or a defective oil pump (replace).
  • F
    fwashingtonSep 9, 2025
    What does it mean if my Kubota M108S has either white or blue exhaust gas?
    • Q
      qhernandezSep 9, 2025
      If your Kubota Tractor is emitting white or blue exhaust gas, it could indicate excessive engine oil (reduce to specified level) or worn or stuck piston ring and cylinder (repair or replace).
  • C
    Christine ElliottAug 22, 2025
    What to do if my Kubota M108S Tractor engine overheats?
    • E
      Erin SinghAug 22, 2025
      If your Kubota Tractor engine overheats, several issues could be the cause. First, the engine might be overloaded, so shift to a lower gear or reduce the load. Check the coolant level and fill the cooling system to the correct level, inspecting the radiator and hoses for leaks. A loose or defective fan belt can also cause overheating, so adjust or replace it. Make sure the radiator core or grille screens are free of debris. Finally, the coolant flow route may be corroded, requiring you to flush the cooling system.

Summary

Operators Manual

Abbreviation List

Universal Symbols

Foreword

Safety First

Safety Alert Symbols and Terms

Definitions of danger, warning, and caution symbols.

Safe Operation

Before Operating the Tractor

Precautions before starting and operating the tractor.

CAB and ROPS Safety

Safety information regarding CAB and ROPS.

Tractor Operation Basics

Covers starting, working, and child safety.

Slope and Road Operation

Safety advice for slopes and road driving.

Parking and PTO Use

Steps for parking and operating the PTO.

Hitch and Servicing Safety

Hitch use and servicing precautions.

Safety Labels

Information on danger, warning, and caution labels.

Servicing of Tractor

Locating Serial Numbers

Finding and recording tractor, CAB, and engine serial numbers.

Specifications

Specification Table

Detailed technical specifications for the tractor model.

Traveling Speeds

Implement Limitations

Tractor Limitations

Maximum weight and load capacities for tractor use.

Instrument Panel and Controls

Instrument Panel Overview

Identification of controls on the dashboard and steering column.

Foot and Hand Controls

Identification of pedals and levers in the operator's area.

Pre-Operation Check

Daily Check Items

List of items to check before operating the tractor.

Operating the Engine

Starting the Engine

Step-by-step procedure for starting the tractor engine.

Cold Weather Starting

Procedures for starting the engine in cold temperatures.

Stopping and Warming Up the Engine

Procedures for shutting down and warming up the engine.

Jump Starting

Instructions for jump-starting a dead battery.

PTO

PTO Operation Basics

General guidelines for PTO operation.

PTO Control Levers

Operation of PTO clutch and gear shift levers.

PTO Monitoring

Displayed PTO information on the LCD monitor.

Operating the Tractor

New Tractor Break-in Procedures

Proper handling of a new tractor during the break-in period.

Operator Adjustments and Controls

Adjusting seat, steering, lights, and horn.

Driving Controls

Operation of brake, clutch, and gear shift controls.

Tractor Operation Modes

Using FWD, creep, and shuttle shift functions.

Throttle, Parking Brake, and Driving Checks

Using throttle levers and releasing parking brake.

Gauges and Monitors

Reading fuel, coolant, tachometer, and speed monitors.

Three-Point Hitch & Drawbar

Hitch Component Selection

Choosing lower link and top link mounting holes.

Drawbar Use

Information on drawbar attachment and adjustment.

Implement Attachment Procedures

Procedures for attaching and detaching implements.

Hitch Adjustment Components

Adjusting lifting rods, stabilizers, and lower links.

Hydraulic Unit

3-Point Hitch Control System

Controls for the 3-point hitch system.

Remote Hydraulic Control System

Operation and types of remote hydraulic controls.

Flow Control Valve

Function and adjustment of the flow control valve.

Hydraulic Control Unit Use Reference Chart

Guide for using hydraulic controls with implements.

Tires, Wheels and Ballast

Tires and Inflation

Tire types and maintaining correct pressure.

Wheel Adjustment

Adjusting front and rear wheel tread width.

Ballast Options

Adding front, rear, and liquid ballast.

Cab Operation

Door and Window Operation

Locking, unlocking, and opening doors and windows.

Interior Lighting

Operation of the dome light.

Work Lights

Using front and rear work lights.

Wiper System

Operation of wipers and washer, including cold weather use.

Air Conditioner System

Operating the AC for airflow, cooling, heating, and defrosting.

Accessory Operation

Using cigarette lighter, control box, outlet, and beacon light.

Maintenance

Service Intervals

Schedule of maintenance tasks based on operating hours.

Lubricants

Recommended lubricants and capacities for the tractor.

Periodic Service

How to Open the Hood

Procedure for opening the tractor hood.

Daily Checks

List of items to check before operating the tractor.

Regular Maintenance Intervals

Maintenance tasks based on operating hours (50-3000).

Annual and Biennial Maintenance

Maintenance tasks required annually and every two years.

Service As Required

Maintenance tasks performed as needed.

Storage

Tractor Storage Procedures

Steps for storing the tractor for extended periods.

Removing Tractor from Storage

Procedures for preparing the tractor after storage.

Troubleshooting

Engine Troubleshooting

Common engine problems and their solutions.

Options

Kubota M108S Specifications

General IconGeneral
Engine Power108 HP
Engine TypeDiesel
PTO Power92 HP
Engine ModelKubota V3800
4x4Yes
Displacement230 cu in
Hydraulic Remotes2
3-Point Hitch CategoryII
Number of Gears24 forward and 24 reverse

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