3. Troubleshooting
107
(I) Faulty operation of injection valve
(II) Uneven supply of fuel oil injected
(III) Faulty operation of governor
(IV) Miscellaneous
No. Cause and effect Countermeasure
1 Impediment to valve needle movement. Lap.
2 Damaged valve spring. Replace.
No. Cause and effect Countermeasure
1 Faulty operation of fuel pump plunger. Clean.
2 Damaged fuel pump plunger. Replace.
3 Damaged plunger spring. Replace.
4 Inaccurate assembly of fuel injection pump. Correctly install pump.
5 Clogging of fuel filter. Clean.
6 Damaged fuel cam. Replace.
7 Air in fuel injection system. Bleed air and prime.
8 Faulty operation of adjustment rack. Adjust.
9 Uneven amount of fuel to cylinders. Adjust.
No. Cause and effect Countermeasure
1 Damaged governor bearing. Replace.
2 Faulty operation of governor link. Adjust.
3 Sticking of governor sleeve. Clean.
4 Faulty operation of fuel oil adjustment. Disassemble, wash and repair.
No. Cause and effect Countermeasure
1 Overloading. Reduce load.
2 Seizure of moving parts. Disassemble, check and repair.
3 Clutch slippage. Check and adjust.
ROTATION IS NOT SMOOTH
(I) Faulty operation of
injection valve
(III) Faulty operation
of governor
(IV) Miscellaneous(II) Uneven supply of
fuel oil injected
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