11-4
Chapter 11 TROUBLESHOOTING
Output Decrease
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.
Table 11-3 Output Decrease
Cause
Remedies
Fuel system
Improper fuel property
Use appropriate fuel.
Clogged fuel filter
Inspect and replace fuel filter.
Clean gauze filter.
Faulty fuel injection timing
Check fuel injection pump couplings.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Improper amount of injected fuel
Check fuel injection pump rack stroke.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty fuel feed pump
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Cooling
system
Overheat, overcooled
Check fan and heat exchange equipment.
Check control system.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Inlet and
exhaust
systems
Insufficient amount of air
Check turbocharger.
Clean, inspect and replace air cleaner element.
Check intake air pressure and leakage of intake air.
Check intake air temperature and ventilation device.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Increase resistance of exhaust air.
Check turbocharger.
Check exhaust pipes and silencer.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Basic engine
Low compression pressure
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty valve timing
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Wear of sliding parts
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Control
system
Faulty governor control
Consult a dealer of Mitsubishi Heavy Industries, Ltd.