Geko 12V 4000 G 41, Operating Instructions Manual

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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.
M015403/00E 02-09 © MTU
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