Symptom Probable cause Solution
Refer-
ence
page
The output is deficient The supply pump is damaged Replace 4-125
4-148
The injector is damaged Replace 4-191
There is compression leakage Check the compression pressure
and repair
4-98
There is a gas leakage from the
exhaust system
Repair or replace 4-106
4-106
4-1
19
4-155
The air cleaner is clogged
Clean or replace the element 3-25
3-9
There is an air leakage from the
compressor discharge side
Replace the turbocharger as-
sembly
4-106
4-119
4-155
The lubricant oil consumption is
too much
The gap of the piston ring points
to the same direction
Move the ring gap direction 4-141
The oil ring is worn out or cannot
move
Replace the oil ring or piston as-
sembly
4-175
4-176
4-141
The piston ring groove is worn
out
Replace the piston and piston
ring
4-175
4-176
4-141
The valve stem and valve guide
are worn out
Replace 4-165
4-165
The crankshaft bearing and the
crankpin bearing is worn out
Replace 4-179
The fuel is mixed into the lubri-
cant oil
The injector is damaged Replace 4-191
Oil dilution due to regeneration Change the engine oil 3-7
Water is mixed into the lubricant
oil
The head gasket is damaged Replace 4-111
The crankcase or cylinder head
is damaged
Replace 4-111
4-123
4-149
The oil pressure is low The engine oil is not sufficient Replenish oil to the specified
amount
3-7
The oil strainer is clogged Clean －
The relief valve does not operate
with dirt
Repair or replace －
The oil clearance of the bearings
are too much
Replace the metal, bushing or
shaft
4-179
4-179
4-181
The oil passage is clogged Clean －
(Continued)
SERVICING
1. Troubleshooting 4. ENGINE
D1803-CR-E4,D1803-CR-TE4,D1803-CR-TIE4,V2403-CR-E4,V2403-CR-TE4,V2403-CR-TE4BG,V2403-CR-TIE4
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