WÄRTSILÄ Vasa R22, Instruction Manual

Page: 223 / 297

insert (3) consisting of a pleated wire gauze around a perforated
case. The wire gauze insert, with a mesh size of 60
µ
m, serves as
a safety filter in case of failure or by-passing of the paper cartridge.
The filters are provided with a bypass valve (7) over the paper
cartridges which opens at a pressure drop of 2 - 3 bar (the pin
comes out). The filter is provided with a combined visual indicator/
electrical switch connected to the alarm system, which indicates
too high pressure drop over the filter which means that the paper
cartridges should be changed as soon as possible.
18.8.2 Changing of filter cartridges
Careful maintenance of the filter reduces engine wear. Change
cartridges regularly (see chapter 04.) and, if the pressure drop
indicator gives alarm, as soon as possible.
As the useful life of the cartridge, to a great extent, depends on
the fuel quality, load, lubricating oil quality, centrifuging and care
of centrifugal filter, experience from the installation concerned
will give the most suitable intervals between changes of car-
tridges.
Change of the cartridges and cleaning should, if possible, be
done during stoppages. By closing one of the filter halves the
cartridge can, however, be changed during operation. As the load
on the other cartridges will increase, the change of cartridges
should be carried out as fast as possible.
Note! Release the pressure by opening the air vent screw (1) before
the drain plug (8) is opened.
1 Shut off the filter side to be served.
2 Remove the protection cover on V-engines.
3 Open the air vent screw (1) about two turns.
4 Open the plug (8) and drain the oil.
5 Open the filter cover.
6 Remove the wire gauze insert. Wash in gas oil. Check
that it is intact.
7 Remove the paper cartridges
and throw away.
Paper cartridges cannot be cleaned. Always keep a sufficient
quantity of cartridges in stock.
8 Clean and rinse the filter housing carefully with gas oil.
9 Fit new paper cartridges and the cleaned wire gauze in-
sert. Check that all seals are intact and in position.
18 Lubricating Oil System 22-9601
18-14 VASA 22