Fuel prefilter with switchable
duplex filter – Flushing
1. Cut out contaminated filter (A or B):
1 Filter A switched off
2 Filter B switched off
2. Open threaded vent plug (1) of filter to be
flushed.
3. Remove drain valve (2) and drain fuel.
Result: Fuel flows from filtered side back to unfil-
tered side, flushing filter deposits downwards
out of the filter.
4. Close threaded vent plug (1) and drain
valve (2).
Fuel prefilter with switchable duplex filter – Filling
1. Stop engine (→ Page 57) and disable engine start.
124 | Fuel Filter | M015650/06E 2018-05
TIM-ID: 0000064788 - 003
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