Overheating; Low Engine Oil Pressure; Table 11-8 Overheating; Table 11-9 Low Engine Oil Pressure - Mitsubishi S4S-DT Operation & Maintenance Manual

Chapter 11 TROUBLESHOOTING

Overheating

Cause
Low coolant level
Faulty water pump operation
Cooling sys-
tem
Faulty thermostat operation
Faulty radiator operation
Control
Increase in load
system
Basic engine Rapid wear of sliding parts

Low engine oil pressure

Cause
Insufficient amount of engine oil
Faulty engine oil property (viscos-
ity)
Lubricating
system
Oil temperature too high
Oil filter clogged
Faulty oil pump operation
Faulty relief valve operation
Control
Faulty pressure unit operation
system
Increase in load
Basic engine
Rapid wear of sliding parts
Increase clearance of sliding part.
11-8

Table 11-8 Overheating

Check coolant leakage.
Check coolant level.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Check and clean radiator and radiator filler cap.
(Refer to P8-13)
Check fuel injection pump rack stroke.
Check control system.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.

Table 11-9 Low engine oil pressure

Check amount of engine oil and lubrication system.
(Refer to P3-2)
Analyze oil property. Use appropriate engine oil.
(Refer to P5-1)
Check coolant system.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Inspect and replace oil filter.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Check control system and wire.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Check control system.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Remedies
(Refer to P3-3)
Remedies
(Refer to P8-8)