11 TROUBLESHOOTING
Mitsubishi Diesel Engine S12R OPERATION & MAINTENANCE MANUAL
182
Pub. No. 291Y1-40720 Revision: 5
Output Shortage
Table 11-3 Output Shortage (1/2)
Problem Cause Remedies Reference
Page
Output Shortage Fuel System Improper fuel
properties
• Change with appropriate fuel. 103
Faulty fuel injec-
tion timing
• Check fuel injection pump drive
coupling.
-
• Contact your MHIET dealer. 10
Improper maxi-
mum injection vol-
ume
• Fuel System - Bleed Air 134
• Check fuel injection pump rack
stroke.
• Check the balance between left
and right banks.
-
• Contact your MHIET dealer. 10
Clogged fuel filter • Check and replace fuel filter. 140
• Gauze Filter - Clean 139
• Change to fuel suitable for the
ambient temperature.
103
Fuel feed pump
malfunction
• Contact your MHIET dealer. 10
Cooling System Overheating • Refer to the items of overheating. 189
Overcooling • Check fan and heat exchanger.
• Check control system.
-
• Contact your MHIET dealer. 10
Intake and
Exhaust
Systems
Insufficient
amount of intake
air
• Turbocharger - Check 165
• Clean, check and replace pre-
cleaner.
166
• Clean, check and replace air
cleaner element.
• Check intake air pressure and
leakage of intake air.
• Check intake air temperature and
ventilation device.
167
• Contact your MHIET dealer. 10
Increase of ex-
haust resistance
• Turbocharger - Check
• Check exhaust pipes, muffler and
silencer.
165
• Contact your MHIET dealer. 10
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