11-6
Chapter 11 TROUBLESHOOTING
Exhaust Smoke is Black or Charcoal
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 11-5 Exhaust smoke is black or charcoal
Cause
Remedies
Fuel system
Improper fuel property
Use appropriate fuel.
Faulty fuel feed pump
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty fuel injection pump
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty fuel injection nozzle
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Faulty fuel injection timing
Check fuel injection pump couplings.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Uneven fuel injection
Check ignition noise, exhaust smoke temperature.
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
Increase in load
Check control system and governor controller.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.