3. Troubleshooting
113
(I) Abnormal noise
(II) Low fuel oil pressure
(III) Low lube oil pressure
(IV) Lube oil temperature is too high
No. Cause and effect Countermeasure
1 Loose flywheel installment bolt. Tighten nuts.
2 Loose crank pin bearing bolt. Tighten nuts and insert pins.
3 Worn crank pin metal. Remove adjustment liner and adjust aperture, or
replace.
4 Faulty gear meshing. Check teeth, shaft, and pushrod of gear for wear.
Replace where necessary.
No. Cause and effect Countermeasure
1 Loose pressure adjustment. Tighten adjustment valve.
2 Damaged supply pump. Check and repair.
3 Clogged filter. Clean.
4 Leaky pipe. Repair.
No. Cause and effect Countermeasure
1 Clogged lube oil filter. Clean.
2 Lube oil temperature is too high. Add cooling water.
3 Trouble with lube oil pump. Disassemble and repair or replace.
4 Loose pressure adjustment valve. Tighten adjustment valve.
5 Oil leakage from pump safety valve. Tighten safety valve.
6 Inadequate viscosity of lube oil. Change lube oil.
7 Insufficient amount of lube oil. Add lube oil.
8 Faulty pressure gauge. Replace.
No. Cause and effect Countermeasure
1 coolant temperature has risen. Adjust the amount of returning water or check the
cooling water pump and lap valves.
2 Overloading. Reduce load.
3 Faulty lube oil temperature adjustment valve. Clean and adjust.
MISCELLANEOUS TROUBLE
(I) Abnormal noise
(III) Low lube oil
pressure
(IV) Lube oil temperature
is too high
(V) Cooling water temperature
is too high
(VI) Cooling water pressure
is too low
(II) Low fuel oil
pressure
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