Bukh DV36/48 Workshop Manual - page 115
N9
009W2329-R01
Lubricating oil filter
The lubricating oil filter is a disposable one which cannot be cleaned.
Exchange the filter every 150 operating hours or once a year.
Remove the filter by hand and discard it.
Tighten the new filter by hand too.
When changing the filter clean the sealing surface on the engine block, if necessary, and
lubricate the rubber gasket of the filter with a little clean oil.
After changing the filter start up and check that the filter and the sealing surface towards the
engine are tight.
A difference valve is fitted in the filter, and this valve shuts out the lubricating oil from the filter so
that the oil is not cleaned any longer if the difference pressure is getting too high over the filter.
Various makes of oil filters can be used as e.g. the motor-car industry uses the filter type used,
as standard.
The BUKH filter used is of make Mann & Hummel type W9.30.