Troubleshooting table
44
Fault
Engine does not start, or starts only with difficulty
Engine starts but does not reach full speed or stalls
Engine idles out of true when warm, misfiring
Engine speed fluctuates during operation
Power output unsatisfactory
Coolant temperature too high, coolant being lost
Lube oil pressure too low
Lube oil pressure too high
Black smoke accompanied by loss of power
Blue smoke
White smoke
Knocking in the engine
Engine “too loud"
Reason
D Fuel tank empty
D Fuel cock closed
D D D D D Air in fuel system
D D D D D Fuel pre-filter / pre-cleaner clogged
D Condensation in fuel
D D D D Air filter clogged
D Electric circuit interrupted
D Batteries flat
D Starter / solenoid switch defective
D D D D D Start of delivery not correct / incorrectly set
D Injection nozzles clogged
D Internal damage to engine
D D D Fuel quality not in accordance with specifications or fueled severely
contaminated
D Lower idling speed set too low
D D D D Valve clearance incorrect
D Injection nozzles of injection pipes leaking
D Intake vacuum before supply pump too high
D Rev. counter defective
D D D Injection nozzles defective or carbonized
D Engine being asked to do more than it has to
D Fuel supply faulty, fuel too warm
D D Oil level in sump too high
D Incorrect rated speed setting
D Coolant level too low
D Air in coolant circuit
D Charge air or coolant temperature too high
D Radiator very dirty
D Tension of water-pump V-belts incorrect (slip)
D Cap with working valves on expansion tank / radiator defective or leak
ing
D Temperature gauge defective
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