running engine:
(Switchable filters only)
1. Clean the filter bracket and put a suitable vessel
under the filter. Remove the protective cap from
the venting nipple. Connect a transparent plastic
hose to the nipple and lower the he into the ves-
sel.
2. Shut off fuel flow through one of the filters by
lifting the handle (2) to release it and then turn it
to its end position (A).
3. Remove the cables (3) from the water trap (4) on
the shut off filter.
4. Relieve pressure inside the filter by opening first
the drain tap (5) and then the venting nipple (1).
Warning!
High pressure inside. Open tap with
caution, hot fluids may spurt out.
5. Unscrew the water trap (4) and the filter, use a
filter wrench if needed.
1
2
3
5
4
6. Clean the sealing surface on the filter bracket.
Make sure the new filter is absolutely clean and
that the sealing surfaces are undamaged. Mois-
ten the seals with engine oil, including the inner
rubber seal on the inside of the threaded hole in
the center of the filter.
notE!
Do not fill the new filter with fuel before as-
sembly. Contaminations may get into the system and
cause damage and malfunction.
7. Screw the new filter on by hand until the seal
just touches the mating surface. Then tighten a
further 3/4 turn.
Reinstall the water trap and
the cables, close the drain tap.
8. Vent by turning the handle (2) to venting position
(B). This allows a reduced flow of fuel through the
filter and the air is evacuated through the vent.
Tighten the venting nipple when air-free fuel flows
out.
9. Remove the hose and put the protective cap back
on the nipple.
10. Repeat the procedure with the other filter.
11. Turn the handle to normal operting position (N).
Check for leakages.
66
Maintenance. Fuel system
Summary of Contents for D9 MH
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