MTU 4R 1000 SERIES, Operating Instructions Manual

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Problem
Possible causes/consequences and
M
Solutions
The poly-V-belt is damaged.
X
Replace the poly-V-belt.
The fan does not switch on correctly.
X
Consult a qualified specialist workshop.
The coolant radiator is dirty on the inside; the coolant radiator is
very dirty on the outside.
X
Clean the coolant radiator.
The thermostat is faulty.
X
Check and replace as necessary.
X
Consult a qualified specialist workshop.
Indicator lamps do not
light up at IGNITION
ON. The lamps are faulty or the electrical cables are interrupted.
X
Consult a qualified specialist workshop.
The charge current indi-
cator lamp lights up
when the engine is run-
ning. The poly-V-belt is slipping.
X
Check the belt tensioner function.
X
Check that the poly-V-belt contact surfaces are not torn, dam-
aged, oily or glazed. Replace the poly-V-belt if necessary.
The poly-V-belt is torn.
X
Replace the poly-V-belt.
The alternator or sensor is faulty.
X
Check the alternator or sensor.
X
Consult a qualified specialist workshop.
The engine is "knock-
ing". The engine is misfiring.
X
Consult a qualified specialist workshop.
The engine is "knock-
ing". There is bearing damage.
X
Consult a qualified specialist workshop.
There are abnormal
sounds. The air intake pipe and exhaust gas pipe are leaking, causing a
whistling noise.
X
Rectify the cause of the leak and, if necessary, replace gaskets.
74
Troubleshooting
Troubleshooting