2. Open threaded vent plug (1) of filter to be
flushed.
3. Open drain valve (2) and drain fuel.
Result: Fuel flows from filtered side back to the unfil-
tered side, flushing the filter deposits down-
wards out of the filter.
4. Close threaded vent plug (1) and drain
valve (2).
Fuel prefilter, filling with fuel
1. Stop engine (→ Page 54) and disable engine start.
2. Connect filling pump to filling connection (1)
on the intake side of the filter.
3. Open vent valve (2) and fill with fuel until fuel
emerges from the vent pipe (3).
4. Close vent valve (2).
5. Open rotary slide valve (4) a little (by approx.
30°) and open vent valve(s) (2), until fuel
emerges from the vent pipe (3).
6. Close vent valve(s) (2).
7. Turn rotary slide valve (4) back to locked po-
sition.
8. Check differential pressure (→ Page 91).
Result: If flushing did not improve differential pres-
sure, replace filter element in fuel prefilter
(→ Page 96).
MS150060/04E 2016-02 | Fuel Filter | 95
TIM-ID: 0000042959 - 005
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