Kubota 05 Series - Page 98

DIESEL ENGINE 05 SERIES WSM, 01640
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
0 Incorrect injection timing
0 Engine’s moving parts seem to be seizing
Uneven fuel injection
0 Deficient nozzle injection
Compression leak
Piston ring’s gap facing the same direction
Oil ring worn or stuck
Piston ring groove worn
0 Valve stem and valve guide worn
0 Carnkshaft bearing, and crank pin bearing
0 Oil leaking due to defective seals or packing
worn
0 Injection pump’s plunger worn
Deficient nozzle injection
0 lniection pump broken
0 Head gasket defective
Cylinder block or cylinder head flawed
0 Engine oil insufficient
Oil strainer clogged
Relief valve stuck with dirt
0 Relief valve spring weaken or broken
0 Excessive oil clearance of crankshaft bearing
0 Excessive oil clearance of crankpin bearing
0 Excessive oil clearance of rocker arm bearing
Oil passage clogged
Different type of oil
Oil pump defective
Different type of oil
Relief valve defective
Solution
Lessen load
Use specified fuel
Clean or change
Clean or change
Repair or replace
nozzle
Adjust
Repair or replace
Repair or replace
injection pump
Repair or replace
nozzle
Replace head
gasket, tighten
cylinder head screw,
glow plug and nozzle
holder
Shift ring gap
direction
Replace
Replace piston
Replace
Replace
Replace
Replace pump
element or injection
Pump
Repair or replace
nozzle
Replace
Replace
Replace
Replenish
Clean
Clean
Replace
Replace
Replace
Replace
Clean
Use specified type
of
oil
Repair or replace
Use specified type
of
oil
Replace
Reference
Page
~
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3
5-53
5-55
S-l55,157
S-151 , 153
S-87, 151
,
5-153
S-l55,157
s-73, 79,
S-81
-
5-97
53-99, 121,
5-123
S-99, 123
S-l07,109
S-133, I35
-
S-87, 153,
5-155
S-79, 159
5-87
S-81
5-107
S-47,51
5-95
-
-
S-l29,131,
5-133
5-127
5-113
-
-
S-141 , 143
I 1 790s 10562
s-9
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