Operating instructions

2 Troubleshooting

Engine does not reach nominal speed

Component Probable Cause

Task

Fuel prefilter clogged Replace filter element ( Page 6  27).Fuel supply

Fuel filter clogged Replace ( Page 6  22).

Air supply Air filter clogged Check signal ring position of service

indicator (

Page 6  31).

Fuel injection equipment Injector defective Replace ( Page 6  15).

Engine wiring Defective Check ( Page 6  55).

Engine Overloaded Contact Service.

Engine speed not steady

Component Probable Cause

Task

Fuel injection equipment Injector defective Replace ( Page 6  15).

Speed sensor Defective Contact Service.

Fuel system Not vented Vent( Page 6  21).

ECU Defective Contact Service.

Charge-air temperature too high

Component Probable Cause

Task

Engine 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  31).

Intercooler Contaminated Contact Service.

Exhaust turbocharger Defective Contact Service.

Coolant leaks on intercooler

Component Probable Cause

Task

Intercooler Leaking, major coolant

discharge

Contact Service.