Draining fuel prefilter with re-
versible duplex filter
1. Switch off filter which is to be drained (A or
B):
1 Filter A switched off
2 Filter B switched off
2. Open threaded vent plug (1) of the filter to be
drained.
3. Open drain valve (2).
4. Drain water and contaminants from filter until
pure fuel emerges.
5. Close drain valve (2).
6. Connect filling pump to filling connection (1)
on the intake side of the filter.
7. Open vent valve (2) and fill with fuel until fuel
emerges from the vent pipe (3).
8. Close vent valve (2).
9. Open rotary slide valve (4) a little (by approx.
30°) and open vent valve(s) (2), until fuel
emerges from the vent pipe (3).
10. Close vent valve(s) (2).
11. Turn rotary slide valve (4) back to locked po-
sition.
178 | Fuel Filter | MS150031/06E 2016-010
TIM-ID: 0000070335 - 001
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