Kubota WSM L3540-II, Workshop Manual, Page: 104 / 672

ENGINE L3540-II, L4240-II, L5040-II, L5240-II, L5740-II , WSM
1-S2
Either Black or Dark
Gray Exhaust Gas Is
Observe 1. Overload Decrease the load –
2. Low grade fuel used Use the specified fuel G-10
3. Air cleaner clogged Clean or change G-28
4. Fuel filter clogged Change G-28
5. Deficient nozzle injection Repair or replace the
nozzle 1-S20
Deficient Output 1. Air cleaner dirty or clogged Clean or replace G-28
2. Deficient nozzle injection Repair or replace the
nozzle 1-S20
3. Compression leak Replace head gasket,
tighten cylinder head
bolt, glow plug and
nozzle holder 1-S12,
1-S40
4. Incorrect injection timing Adjust 1-S17
5. Engine's moving parts seem to be seizing Repair or replace –
6. Uneven fuel injection Repair or replace the
injection pump 1-S43
Excessive Lubricant
Oil Consumption 1. Piston ring's gap facing the same direction Shift ring gap
direction 1-S50
2. Oil ring worn or stuck Replace 1-S66
3. Valve stem and guide worn Replace 1-S56
4. Piston ring groove worn Replace the piston 1-S66
5. Oil leaking due to damaged seals or packing Replace –
Fuel Mixed Into
Lubricant Oil 1. Injection pump's plunger worn Replace pump 1-S43
2. Deficient nozzle injection Repair or replace the
nozzle 1-S20
3. Injection pump broken Replace 1-S43
Water Mixed Into
Lubricant Oil 1. Cylinder block or cylinder head flawed Replace 1-S56,
1-S71
2. Head gasket damaged Replace 1-S40
Low Oil Pressure 1. Engine oil insufficient Fill G-21
2. Different type of oil Use the specified type
of oil G-10
3. Oil strainer clogged Clean 1-S49
4. Relief valve stuck with dirt Clean –
5. Relief valve spring weaken or broken Replace –
6. Oil Pump damaged Repair or replace 1-S48
7. Excessive oil clearance of crankshaft bearing Replace 1-S69
8. Excessive oil clearance of crankpin bearing Replace 1-S68
9. Excessive oil clearance of rocker arm Replace 1-S59
10.Oil passage clogged Clean –
High Oil Pressure 1. Difference type oil Use the specified type
of oil G-10
2. Relief valve damaged Replace –
Symptom Probable Cause Solution
Reference
Page
KiSC issued 02, 2015 A