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. (Refer to P4-1)
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. (Refer to P8-19)
Clean, inspect and replace air cleaner element. (Refer to P8-
21)
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. (Refer to P8-19)
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.