3.
Tr
ou
bleshooting
55
(3) Sticking of valve needle
(4) Faulty injection spray
TROUBLE AND TROUBLESHOOTING
Cause and Ef
fect
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
Summary of Contents for 3YM30
Page 1: ...M9961 03E101 3YM30 3YM20 2YM15...
Page 22: ...1 General 1 4 Engine outline 1 3YM30 with KM2P 1 marine gear 6R1...
Page 23: ...1 General 2 3YM30C with SD20 sail drive 7R1...
Page 24: ...1 General 3 3YM20 with KM2P 1 marine gear 8...
Page 26: ...1 General 5 2YM15 with KM2P 1 marine gear 9 2R1...
Page 27: ...1 General 6 2YM15C with SD20 sail drive 185 9 3R1...
Page 30: ...1 General 3 2YM15 with KM2P 1 marine gear 11 2R1...
Page 31: ...1 General 11 3R1 4 2YM15C with sale drive SD20...