Engine does not reach rated speed
Cause
Corrective action
Fuel prefilter clogged
u
Replace.
Fuel filter clogged
u
Replace (→ Page 84).
Air supply: Air filter clogged
u
Clean.
Fuel injection: Injector faulty
u
Replace (→ Page 77).
Engine wiring defective
u
Check (→ Page 124).
Engine: Overloaded
u
Contact Service.
Engine speed not steady
Cause
Corrective action
Fuel injection: Injector faulty
u
Replace (→ Page 77).
Speed transmitter defective
u
Contact Service.
Fuel system: Air in fuel system
u
Vent fuel system (→ Page 83).
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 supply: Air filter clogged
u
Clean.
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 supply: Air filter clogged
u
Clean.
Fuel injection: Injector faulty
u
Replace (→ Page 77).
Engine: Overloaded
u
Contact Service.
MS150026/02E 2013-11
| Troubleshooting | 39
TIM-ID: 0000046159 - 001