MAK M43C, Руководство по эксплуатации

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Fault tracing
Oil mist detector
A3.11.18.01.01
M25-M601C
en / 21.02.2006 BA021345 1/3
Introduction:
The crankcase monitoring device (oil mist detector) monitors the oil mist concentration in the
crankcase. During engine operation there is always a slight oil mist concentration.
If, however, the actual oil mist concentration exceeds a preset, fixed value first an alarm and then,
in case of a further increase in concentration, an automatic engine stop will be triggered!
An increased oil mist concentration in the crankcase may be indicative of operational distur-
bances, with bearing damages, timing gear train damages, piston seizure or blowby from the
combustion chamber being the most frequent causes.
Attention:
With increased oil mist concentration there is a risk of crankcase explosion. This may lead
to severe personal injuries and engine damages.
When an alarm is triggered, the cause of it must be identified as quickly as possible. In
case of doubt stop the engine immediately by hand.
Attention:
Do not restart an engine that has run hot without first eliminating the cause of the alarm!
After standstill of an engine that has run hot, wait 10 to 15 minutes before opening the
crankcase doors in order to prevent a possible explosion by air supply from outside. If ne-
cessary, contact the Caterpillar/ MaK-Customer Service!
Checks after an engine stop due to oil mist alarm:
1. Check of the oil mist detector:
Check the oil mist detector for correct function according to the documentation of the
manufacturer (
siehe C5.05.11.02.03. nn ).
Note:
Besides carrying out a normal functional check of the oil mist detector the measuring chamber
should be examined for traces of water.
Water vapour may trigger a false alarm. If there should be any traces of water, the measuring
chamber and the sensors must be cleaned.