Fav 900
Engine / General system
Turbocharger, troubleshooting
B
Faults
Fav 900 chassis number 23/3001 and up
15.2.2001
2000 000003
B
a
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Capitel Docu-No.
Index
Date Version
Page
Turbocharger, troubleshooting
Oil in intake pipes and intercooler
Oilspray within the intake system is necessary. It lubricates inlet valve seats.
If too much oil is encountered to such an extent that puddles can be found within the air box of the
intercooler, there is a serious risk of engine "runaway", an uncontrolled increase of engine speed .
Leaks must immediately be removed.
Possible origins:
Bullet-List
● Engine oil level too high - Check whether proper dipstick is used -
● Inadequate engine oil, check "Lubricants " schedule.
● Operation on not allowed high slanting angles
● High pressure within crankcase, e. g. Oil release valve failure (Crank case venting) or worn piston
rings
Text-module
Turbocharger compressor coking
Can occur by excessive intake air temperature, e.g. during constant full load opreation.
Coking may result in reduced intake air pressure, there will not be a noticeable power reduction or a
diminished acceleration behavior. Coking may result in exhaust turbitidy.
If Turbocharger compressor coking occurs:
Bullet-List
● Disassemble compressor housing. Avoid compressor fan wheel damage which could result in
balancing problems and strong vibrations until complete destruction of the turbocharger.
● Use a solvent to remove coking from the compressor housing
Bullet-List
● In severe cases, use special oil with low coking risk.
Warning:
Never inject solvent spray while the engine is running - Accident Hazard !!! -
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