Kubota GR1600EC2, Workshop Manual, Page: 70 / 241

1-S3
GR1600EC2, WSM ENGINE
W1014322
Symptom Probable Cause Solution
Reference
Page
Water Mixed into
Lubricant Oil Head gasket defective Replace 1-S23
Cylinder block or cylinder head flawed Replace –
Low Oil Pressure Engine oil insufficient Replenish G-8, 14
Oil strainer clogged Clean –
Oil filter clogged Replace G-28
Relief valve stuck with dirt Clean –
Relief valve spring weaken or broken Replace –
Excessive oil clearance of crankshaft bearing Replace 1-S48
Excessive oil clearance of crankpin bearing Replace 1-S46
Excessive oil clearance of rocker arm Replace 1-S39
Oil passage clogged Clean –
Different type of oil Use specified type of
oil G-8
Oil pump defective Repair or replace 1-S27
High Oil Pressure Different type of oil Use specified type of
oil G-8
Relief valve defective Replace –
Engine Overheated Engine oil insufficient Replenish G-8
Fan belt broken or tensioned improperly Replace or adjust G-28,
1-S13
Coolant insufficient Replenish G-8
Radiator net and radiator fin clogged with dust Clean –
Inside of radiator corroded Clean or replace G-32,
1-S21
Coolant flow route corroded Clean or replace G-32
Radiator cap defective Replace 1-S14
Radiator hose damaged Replace G-30
Overload running Reduce the load –
Head gasket defective Replace 1-S23
Incorrect injection timing Adjust 1-S15
Unsuitable fuel used Use specified fuel G-8
KiSC issued 07, 2006 A