Instructions for heavy fuel Operation
Care and supervision / Lubricating Oil
A3.04.08.01
M20/M282/M332C/M452/M453C/M551/M552C/M601/M601C
en / 11.07.1996 BA000015 3/4
Ĺ
3.1 Prelubrication LP2 (standby or prelubrication pump)
Only a sufficient prelubrication will produce the necessary oil film on all bearings for engine
starting.
• Check the oil pressure build-up at the last main bearing (if there is no automatic engine
locking).
• Prime the circuit until the pump pressure is steady.
3.2 Check the operation of the engine-driven force pump LP1
• Check the oil pressure (at rated speed and working temperature), if the pressure is too low,
check:
• is the oil pressure regulating valve closed?
• is the pump relief valve tight?
• are the suction pipes seals tight?
• is the suction strainer clogged?
• is the flushing quantity of the automatic filter too large?
3.3 Lube oil Automatic filter LF2 (flushing with oil or compressed air)
The flushing frequency results from the quantity of dirt particles that remained in the lube oil
(which indicates the separator function).
• Monitor the flushing intervals of the filter (the flushing cycle counter indicates the
contamination level).
If there are more than 100 flushings per day, the cause of the oil contamination must be
detected:
- Check the separator operation
- Charge air is too cold (soot formation)
• Check and clean the filter elements (see the servicing instructions in the documents from
the manufacturer).
• If the back-flushing filter flushes with oil, set the flushing flow (valve in the flushing line) so
that there will be no drop in the working pressure.
• If the back-flushing filter is equipped with flushing oil preparation, the inserts of this must
be cleaned or exchanged in the event of a filter alarm.
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