Exhaust Smoke Is Black Or Charcoal; Table 11-5 Exhaust Smoke Is Black Or Charcoal - Mitsubishi S12A2-PTA2 Operation & Maintenance Manual

Chapter 11 TROUBLESHOOTING

Exhaust Smoke is Black or Charcoal

Cause
Improper fuel property
Faulty fuel feed pump
Faulty fuel injection pump
Faulty fuel injection nozzle
Fuel system
Faulty fuel injection timing
Uneven fuel injection
Insufficient amount of air
Inlet and
exhaust
systems
Increase resistance of exhaust air.
Low compression pressure
Basic engine Faulty valve timing
Rapid wear of sliding parts
Control
Increase in load
system
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.
11-6

Table 11-5 Exhaust Smoke is Black or Charcoal

Use appropriate fuel.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Check fuel injection pump couplings.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Check exhaust smoke temperature, left and right bank bal-
ance.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Check turbocharger.
Clean, inspect and replace pre-cleaner.
Check intake air pressure and leakage of intake air.
Check intake air temperature and ventilation device.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Check turbocharger.
Check exhaust pipes and silencer.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Check control system and governor controller.
Consult a dealer of Mitsubishi Heavy Industries, Ltd.
Remedies
(Refer to P4-1)
(Refer to P8-18)
(Refer to P8-18)
(Refer to P8-18)