Technical data

5–02 Troubleshooting

Engine does not reach nominal speed

Component Probable Cause

Task

Fuel prefilter clogged Replace (→ Page 6 – 32).Fuel supply

Fuel filter clogged Replace (→ Page 6 – 25).

Air supply Air filter clogged Check signal ring position of service

indicator ( → Page 6 – 37).

Injector defective Replace (→ Page 6 – 18).Fuel injection equipment

Injection pump defective Replace (→ Page 6 – 15).

Engine wiring Defective Check (→ Page 6 – 62).

Engine Overloaded Contact Service.

Engine speed not steady

Component Probable Cause

Task

Injector defective Replace (→ Page 6 – 18).Fuel injection equipment

Injection pump defective Replace (→ Page 6 – 15).

Speed sensor Defective Contact Service.

Fuel system Not vented Vent fuel system (→ Page 6 – 23).

ECU Defective Contact Service.

Charge-air temperature too high

Component Probable Cause

Task

Coolant Incorrect coolant concentration Check (MTU test kit).

Intercooler Contaminated Contact Service.

Engine room Air-intake temperature too high Check fans and air supply / ventilation ducts.

Charge air pressure too low

Component Probable Cause

Task

Air supply Air filter clogged Check signal ring position of service

indicator ( → Page 6 – 37).

Intercooler Contaminated Contact Service.

Exhaust turbocharger Defective Contact Service.