Kubota B1220 Workshop Manual page 71

B1220, B1620, B1820, WSM
Symptom
Either Black or Dark
Gray Exhaust Gas Is
Observed
Deficient Output
Excessive Lubricant
Oil Consumption
Fuel Mixed into
Lubricant Oil
Water Mixed into
Lubricant Oil
Low Oil Pressure
High Oil Pressure
Probable Cause
Overload
Low grade fuel used
Fuel filter clogged
Air cleaner clogged
Deficient nozzle injection
Incorrect injection timing
Engine's moving parts seem to be seizing
Injection pump malfunctioning
Deficient nozzle injection
Compression leak
Piston ring's gap facing the same direction
Oil ring worn or stuck
Piston ring groove worn
Valve stem and valve guide worn
Crankshaft bearing and crank pin bearing worn
Oil leaking due to defective seals or packing
Injection pump's plunger worn
Deficient nozzle injection
Injection pump broken
Head gasket defective
Cylinder block or cylinder head flawed
Engine oil insufficient
Oil strainer clogged
Relief valve stuck with dirt
Relief valve spring weaken or broken
Excessive oil clearance of crankshaft bearing
Excessive oil clearance of crankpin bearing
Excessive oil clearance of rocker arm
Oil passage clogged
Different type of oil
Oil pump defective
Different type of oil
Relief valve defective
Reduce the load
Use specified fuel
Clean or replace
Clean or replace
Repair or replace
nozzle
Adjust
Repair or replace
Repair or replace
Repair or replace
nozzle
Check the
compression
pressure and repair
Shift ring gap
direction
Replace
Replace piston
Replace
Replace
Replace
Repair or replace
Repair or replace
nozzle
Replace
Replace
Replace
Replenish
Clean
Clean
Replace
Replace
Replace
Replace
Clean
Use specified type of
oil
Replace
Use specified type of
oil
Replace
1-S2
ENGINE
Reference
Solution
Page
–
G-9
G-26, G-31
G-25, G-26
1-S18
1-S15
–
1-S31
1-S18
1-S10
1-S35
1-S35
1-S35
1-S29
1-S38
–
1-S31
1-S18
1-S31
1-S28
1-S28
G-9
1-S30
–
–
1-S52
1-S51
1-S43
–
G-9
1-S56
G-9
–
KiSC issued 07, 2011 A
(EU)