Troubleshooting table
128
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
D
D
Air in fuel system
D D D D D
D
D
Fuel pre-filter / pre-cleaner clogged
D D D 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 D D D
Internal damage to engine (piston seized, possibly caused by water in
fuel)
D D D D
D
Fuel quality not in accordance with specifications or fueled severely
contaminated
D
D
Valve clearance incorrect
D D D D D
D
D
Injection system leaking / error
D D D D D
Too little fuel in tank
D
Rev. counter defective
D
Engine being asked to achieve more output than possible
D D
D D
Fuel supply faulty / leaking
D
D
D
Oil level in sump too high
D
Coolant level too low
D
Air in coolant circuit
D
Tension of coolant-pump V-belts incorrect (slip)
D
Cap with working valves on expansion tank / radiator defective or
leaking
D
Temperature gauge defective
D
Coolant pipes leaking, blocked or twisted
D
Oil level in sump too low
D
Engine temperature too high
D D D
Oil filter clogged
D D
Oil pressure gauge defective
D D
Selected oil viscosity not suitable for ambient temperature (oil too thin)