Kubota M108S Workshop Manual

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M108S

WORKSHOP MANUAL

TRACTOR

KiSC issued 06, 2007 A

Table of Contents

Other manuals for Kubota M108S

Operator's Manual124 pages

Questions and Answers:

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.
M
melindavargasAug 26, 2025
What to do if my Kubota M108S Tractor has either black or dark gray exhaust gas?
- K
  Kimberly HarmonAug 26, 2025
  If your Kubota Tractor is emitting black or dark gray exhaust gas, it could be due to several reasons. You might be overloading the engine, in which case you should reduce the load. Another cause could be the use of low-grade fuel, so use specified fuel. Also, the fuel filter might be clogged (replace it) or the air cleaner might be clogged (clean or replace it). Finally, deficient injection can be the reason, so repair or replace the injector.
A
Andre JohnsonAug 27, 2025
Why does my Kubota Tractor have insufficient engine power?
- J
  John JohnsonAug 28, 2025
  Insufficient engine power in your Kubota Tractor could be due to insufficient or dirty fuel. Check the fuel system. Also, a clogged air cleaner can cause this issue; clean or replace the element.
S
Samuel KellyAug 29, 2025
Why are the exhaust fumes colored on my Kubota M108S?
- D
  Debra JohnsonAug 29, 2025
  Colored exhaust fumes from your Kubota Tractor can indicate different issues. If the fumes are black, change the fuel and fuel filter, check the oil level, and clean or replace the air filter element. If the fumes are blue-white, check the intake air heater function in cold weather, heat the muffler by applying a load to the engine, inspect the injection nozzle, and change the fuel and fuel filter.
K
Kathy HubbardAug 31, 2025
What to do if my Kubota M108S engine stops suddenly?
- S
  stantonhectorAug 31, 2025
  If your Kubota Tractor engine stops suddenly, it could be due to insufficient fuel. Refuel and bleed the fuel system if necessary.
W
William BlanchardSep 2, 2025
What to do if my Kubota M108S Tractor has deficient output?
- E
  Emily DixonSep 2, 2025
  If your Kubota Tractor has deficient output, consider these potential causes: the engine’s moving parts might be seizing (repair or replace), the supply pump might be malfunctioning (repair or replace), or there might be deficient injection (replace injector). Other possible causes include a compression leak (check the compression and repair), a gas leak from the exhaust system (repair or replace), an air leak from the compressor discharge side (repair or replace), a dirty or clogged air cleaner (clean or replace), or a compressor wheel that does not turn freely (replace the turbocharger assembly).
E
Eric WeissSep 3, 2025
What to do if my Kubota Tractor engine revolution is not smooth?
- D
  Danny IngramSep 3, 2025
  If your Kubota Tractor engine revolution is not smooth, it could be due to a fuel filter clogged or dirty (replace it), an air cleaner clogged (clean or replace it), or a fuel leak due to loose injection pipe retaining nut (tighten retaining nut). Other potential causes include a malfunctioning supply pump (repair or replace), an injector stuck or clogged (replace), a turbocharger bearing worn out (replace the turbocharger assembly), a turbocharger shaft bent (replace the turbocharger assembly), or turbocharger fin or other part damaged due to foreign matter (replace the turbocharger assembly).
M
Mark MarshallSep 5, 2025
How to fix excessive engine oil consumption in my Kubota M108S?
- G
  Gerald HillSep 5, 2025
  Excessive engine oil consumption in your Kubota Tractor can be caused by several issues. The piston ring’s gap might be facing the same direction (shift ring gap direction), the oil ring might be worn or stuck (replace), or the piston ring groove might be worn (replace piston). Other potential causes include worn valve stem and valve guide (replace), worn crankshaft bearing and crank pin bearing (replace), or oil leaking due to defective seals or packing (replace).
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).
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).

Kubota M108S Specifications

General

Engine Power	108 HP
Engine Type	Diesel
PTO Power	92 HP
Engine Model	Kubota V3800
4x4	Yes
Displacement	230 cu in
Hydraulic Remotes	2
3-Point Hitch Category	II
Number of Gears	24 forward and 24 reverse

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