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Operation Manual Mitsubishi SS-Series diesel engines
Version 08/2004
ENGLISH
TROUBLESHOOTING
Overheating Not enough coolant in system Add coolant
Leaks in cooling system Retighten or repair
Loose fan belt Adjust
Restriction to air flow through radiator Remove restrictions
Defective water pump Replace
Defective thermostat Replace
Defective fan Replace
High LLC concentration Adjust LLC concentration
Too much white or blue
smoke
Too much oil in engine Drain to correct level
Oil viscosity too low Change oil
Defective thermostat (coolant temperature too
low)
Replace
Defective fuel injection nozzles Repair or replace*
Wrong injection timing Adjust*
Wrong fuel cetane number Change fuel
Poor compression (cylinders, piston rings, etc.
worn)
Repair or replace*
Too much black or gray
smoke
Bad quality fuel Change fuel
Defective fuel injection pump Repair or replace*
Defective fuel injection nozzles Repair or replace*
Wrong injection timing Adjust*
Clogged air cleaner Clean or replace
Wrong valve clearance Adjust
Poor compression (cylinders, piston rings, etc.
worn)
Repair or replace*
Fuel consumption too
high
Bad quality fuel Change fuel
Defective fuel injection pump Repair or replace*
Defective fuel injection nozzles Repair or replace*
Wrong injection timing Adjust*
Clogged air cleaner Clean or replace
Poor compression (cylinders, piston rings, etc.
worn)
Repair or replace*
Problem Cause Correction
Table 12 Troubleshooting