3. Troubleshooting
112
(IV) Leakage of pressurized gas from inside cylinder
(V) Irregular fuel injection timing
(VI) Clogged intake air filter
(VII) Miscellaneous
No. Cause and effect Countermeasure
1 Leakage of gas from suction/exhaust valves. Lap valves.
2 Inadequate tapper clearance. Adjust.
3 Worn upper part of cylinder liner. Replace.
4 Worn piston ring. Replace.
5 Sticking of piston ring. Disassemble and repair or replace.
No. Cause and effect Countermeasure
1 Early injection. Adjust timing to delay injection.
2 Late injection. Adjust timing to speed injection.
No. Cause and effect Countermeasure
1 Clogging of air filter. Clean.
No. Cause and effect Countermeasure
1 Poor quality fuel oil. Replace with good fuel oil.
2 Clogging of exhaust line. Clean.
3 Seizure of moving parts. Disassemble, check and repair.
4 Insufficient coolant. Lap cooling water pump suction/exhaust valves.
5 Insufficient lube oil supplied. Disassemble and clean lube oil pump and filter.
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