1 ENGINE 82410 • 82710 • 82910 W8M, 12271
Symptom
Probable Cause Solution
Reference
Page
Either Black or Dark
• Overload
Lessen load
-
Gray Exhaust Gas
Is
• Low grade fuel used
Use specified fuel G-8
Observed
• Fuel filter clogged
Replace G-20
• Air cleaner clogged
Clean or replace G-20
• Deficient nozzle injection
Repair or replace 1-856
nozzle
Deficient Output
• Incorrect injection timing
Adjust
1-853
• Engine's moving parts seem to be seizing
Repair or replace
-
• Uneven fuel injection
Repair or replace 1-824
injection pump
• Deficient nozzle injection
Repair or replace 1-856
nozzle
• Compression leak
Replace head 1-820
gasket, tighten
cylinder head screw,
glow plug and nozzle
holder
Excessive Lubricant • Piston ring's gap facing the same direction
8hift ring gap 1-829
Oil Consumption
direction
• Oil ring worn or stuck
Replace
1-829
• Piston ring groove worn
Replace piston
1-829
• Valve stem and valve guide worn
Replace 1-832
• Oil leaking due to defective seals or packing
Replace
-
Fuel Mixed into
• Injection pump's plunger worn
Replace pump 1-824
Lubricant Oil
element or injection
pump
• Deficient nozzle injection
Repair or replace
1-856
nozzle
• Injection pump broken
Replace
1-824
Water Mixed into
• Head gasket defective
Replace
1-820
Lubricant Oil
• Cylinder block or cylinder head flawed
Replace
1-820
Low Oil Pressure
• Engine oil insufficient
Replenish
G-8
• Oil strainer clogged
Clean
1-827
• Oil filter cartridge clogged
Replace
G-12
• Relief valve stuck with dirt
Clean
-
• Relief valve spring weaken or broken
Replace
-
• Excessive oil clearance of crankshaft bearing
Replace 1-845
• Excessive oil clearance of crankpin bearing
Replace
1-844
• Excessive oil clearance of rocker arm
Replace 1-835
• Oil passage clogged
Clean
-
• Different type of oil
Use specified type of G-8
oil
• Oil pump defective
Repair or replace 1-849
High Oil Pressure
• Different type of oil
Use specified type of
G-8
oil
• Relief valve defective
Replace
-
12271810020
1-82
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