Engine speed not steady
Cause
Corrective action
Injector is faulty.
u
Replace (→ Page 88).
Injection pump is faulty.
u
Replace (→ Page 84).
Speed sensor is faulty.
u
Contact Service.
Air in fuel system
u
Vent fuel system (→ Page 100).
Engine governor is faulty.
u
Contact Service.
Charge-air temperature too high.
Cause
Corrective action
Incorrect engine coolant
concentration.
u
Check (MTU test kit).
Charge-air cooler is contaminated.
u
Contact Service.
Air inlet temperature in engine
room is too high.
u
Check fans and air supply / ventilation ducts.
Charge-air pressure too low
Cause
Corrective action
Air filter clogged.
u
Check signal ring position of contamination indicator (→ Page 114).
Charge-air cooler is contaminated.
u
Contact Service.
Exhaust turbocharger is faulty.
u
Contact Service.
Coolant leaks at intercooler
Cause
Corrective action
Major coolant discharge at
charge-air cooler. Charge-air
cooler leaky.
u
Contact Service.
Black exhaust gas
Cause
Corrective action
Air filter clogged.
u
Check signal ring position of contamination indicator (→ Page 114).
Injector is faulty.
u
Replace (→ Page 88).
Injection pump is faulty.
u
Replace (→ Page 84).
Overload.
u
Contact Service.
68 | Troubleshooting | MS15018/03E 2016-02
TIM-ID: 0000066976 - 001