Kubota M108S, Workshop Manual

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1-S3
M108S, WSM ENGINE
W1014322
Symptom Probable Cause Solution
Reference
Page
Deficient Output Engine’s moving parts seem to be seizing Repair or replace –
Supply pump malfunctioning Repair or replace 1-S27
Deficient injection Replace injector 1-S32, 33
Compression leak Check the
compression and
repair 1-S13
Gas leak from exhaust system Repair or replace 1-S17, 26
Air leak from compressor discharge side Repair or replace 1-S17, 26
Air cleaner dirty or clogged Clean or replace G-20
Compressor wheel does not turn freely Replace the
turbocharger
assembly 1-S17, 26
Excessive Engine Oil
Consumption Piston ring’s gap facing the same direction Shift ring gap
direction 1-S42
Oil ring worn or stuck Replace 1-S43, 60
Piston ring groove worn Replace piston 1-S60
Valve stem and valve guide worn Replace 1-S52
Crankshaft bearing and crank pin bearing worn Replace 1-S62
Oil leaking due to defective seals or packing Replace –
Fuel Mixed into
Engine Oil Deficient injection Replace injector 1-S32, 33
Fuel leak from overflow pipe inside of cylinder
head cover Replace the gasket –
Water Mixed into
Engine Oil Head gasket defective Replace 1-S36
Cylinder block or cylinder head flawed Replace 1-S35
Low Oil Pressure Engine oil insufficient Replenish G-15
Oil strainer clogged Clean 1-S41
Relief valve stuck with foreign matter Clean 1-S39
Relief valve spring weak or broken Replace 1-S39
Excessive oil clearance of crankshaft bearing Replace 1-S63
Excessive oil clearance of crankpin bearing Replace 1-S62
Excessive oil clearance of rocker arm Replace 1-S28, 54
Oil passage clogged Clean –
Different type of oil Use specified type of
oil G-7
Oil pump defective Replace 1-S65
KiSC issued 06, 2007 A