3. Troubleshooting
55
(3) Sticking of valve needle
(4) Faulty injection spray
TROUBLE AND TROUBLESHOOTING
Cause and Effect
Countermeasure
(III-1) Adjust pump adjustment rack.
(IV-1) Check cooling water pump and lap valves.
(IV-2) Replace.
(IV-3) Replace.
(IV-4) Replace with good fuel oil.
(IV-5) Replace with good fuel oil.
(IV-6) Check and repair.
Countermeasure
KNOCKING
Chart 6
(I-1) Increase injection pressure.
(I-2) Replace.
(I-3) Disassemble and lap.
(I-4) Disassemble and repair.
(II-1) Delay injection timing.
(II-2) Adjust standard injection pressure.
(1) Low injection pressure
(1) Early fuel injection
(III) Excessive quantity of fuel injected each time
(IV) Miscellaneous
(1) Excessive quantity of fuel
is ejected from fuel pump
(4) Poor quality fuel oil
KNOCKING
(I) Faulty fuel injection valve
(1) Insufficient cooling water
(2) Excess piston clearance
(3) Excess bearing clearance
(2) Damaged fuel valve spring
(II) Faulty fuel injected
(2) Fuel pressure is too high
(5) Water mixed in fuel oil
(6) Incorrect pressure
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