Engine speed not steady
Cause
Corrective action
Injector defective
u
Contact Service.
Speed transmitter defective
u
Contact Service.
Air in fuel system
u
Vent fuel system (→ Page 103).
Engine governor defective
u
Contact Service.
Charge air temperature too high
Cause
Corrective action
Engine coolant treatment
incorrect
u
Check (MTU test kit).
Intercooler clogged
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
Replace air filter .(→ Page 110)
Intercooler clogged
u
Contact Service.
Exhaust turbocharger defective
u
Contact Service.
Coolant leaks at intercooler
Cause
Corrective action
Intercooler leaky, major coolant
discharge
u
Contact Service.
Black exhaust gas
Cause
Corrective action
Air filter clogged
u
Replace air filter .(→ Page 110)
Injector defective
u
Contact Service.
Engine: Overloaded
u
Contact Service.
Blue exhaust gas
Cause
Corrective action
Too much oil in engine
u
Drain engine oil (→ Page 113).
Exhaust turbocharger, cylinder
head, piston rings, cylinder liner
defective
u
Contact Service.
60 | Troubleshooting | MS150100/04E 2015-09
TIM-ID: 0000054488 - 001