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Normal
Check oil quality
Replace with
specified oil
Unconfirmed
Inspect compressed
pressure
Normal
Inspect injection
pump
Normal
Adjust
Check fuel quality
Use specified fuel
6. Oil Consumption Excessive
Inspect oil leakage
Engine disassembly
(piston cylinder liner)
7. Engine Knocking
Inspect combustion of fuel & oil
(carbon residue exhaust gas)
Too low
Check valve clearance and
cylinderhead gasket for damage
Replace
Normal
Adjust
Disassemble
engine
- 53 -
Cause according to use conditions
1. Excessive oil infusing
2. Continuous operation in low or
extremely cold state
Oil leakage
Internal
External
Retighten
Check compressed
Replace
pressure
Disassemble
cylinderhead
(valve stem seal)
Inspect air cleaner
Clean Replace
Normal
Confirm
Disassemble
engine
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