Engine does not reach nominal speed
Cause
Corrective action
Fuel prefilter clogged
u
Replace (→ Page 98).
Fuel filter clogged
u
Replace (→ Page 92).
Air filter clogged
u
Check signal ring position of service indicator (→ Page 103).
Injector defective
u
Replace (→ Page 85).
Engine cabling defective
u
Check (→ Page 128).
Engine: Overload
u
Contact Service.
Engine speed not steady
Cause
Corrective action
Injector defective
u
Replace (→ Page 85).
Speed transmitter defective
u
Contact Service.
Air in fuel system
u
Vent fuel system (→ Page 91).
Engine governor defective
u
Contact Service.
Charge-air temperature too high
Cause
Corrective action
Engine coolant treatment
incorrect
u
Check (→ MTU test kit).
Intercooler dirty
u
Contact Service.
Engine room: Air-intake
temperature too high
u
Check fans and intake/exhaust lines.
Charge-air pressure too low
Cause
Corrective action
Air filter clogged
u
Check signal ring position of service indicator (→ Page 103).
Intercooler dirty
u
Contact Service.
Exhaust turbocharger defective
u
Contact Service.
Coolant discharge at intercooler
Cause
Corrective action
Leaking, major coolant discharge
u
Contact Service.
Black exhaust gas
Cause
Corrective action
Air filter clogged
u
Check signal ring position of service indicator (→ Page 103).
Injector defective
u
Replace (→ Page 85).
Engine: Overload
u
Contact Service.
54 | Troubleshooting | M015565/03E 2016-02
TIM-ID: 0000065774 - 001
