Fuel Prefilter – Filling With Fuel - MTU 20 V 4000 M93 x Operating Instructions Manual

2. Open vent plug (5) of the filter to be flush-
ed.
3. Unlock drain cock (6) by pressing toggle,
open it and drain fuel.
Result: Fuel flows from filtered side back to the un-
filtered side, flushing the filter deposits
downwards out of the filter.
4. Close vent plug (5) and drain cock (6).
Fuel prefilter – Filling with fuel
1. Stop engine (→ Page 70) and disable engine start.
2. Remove screws securing the cover and take off cover (2).
3. Fill filter housing with clean fuel.
4. Place new gasket in cover (2).
5. Fit cover with gasket and secure it with screws.
6. Check differential pressure (→ Page 131).
Result: If flushing did not lead to an improvement of the differential pressure, replace filter element of fuel pre-
filter (→ Page 135).
134 | Task Description | MS150048/04E 2013-07