11-9
Chapter 11 TROUBLESHOOTING
Overheating
Note: The table above also include the parts Mitsubishi Heavy Industries, Ltd. does not supply. For the parts Mitsub-
ishi Heavy Industries, Ltd. does not supply, inspect and maintain them following the manufacturer's operation
manual.
Low Engine Oil Pressure
Table 11-8 Overheating
Cause
Remedies
Cooling
system
Low coolant level
Check coolant leakage
Check coolant level.
Faulty water pump operation
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty thermostat operation
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty heat exchanger operation
Check and clean heat exchanger.
Control
system
Increase in load
Check fuel injection pump rack stroke.
Check control system and governor controller.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Basic engine Wear of sliding parts
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Table 11-9 Low Engine Oil Pressure
Cause
Remedies
Lubricating
system
Insufficient amount of engine oil
Check amount of engine oil and lubrication system.
Faulty engine oil property
(viscosity)
Analyze oil property. Use appropriate engine oil.
Engine oil temperature is high.
Check coolant system.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Oil filter clogged
Inspect and replace oil filter and bypass oil filter.
Faulty oil pump operation
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty relief valve operation
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Control
system
Oil pressure gauge failure
Check control system and wire.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Basic engine
Increase in load
Check fuel injection pump rack stroke.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Rapid wear of sliding parts
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Increase clearance of sliding part.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.