MTU 12 V 4000 M23F Operating Instructions Manual page 192

6. Connect filling pump to filling connection
(1) on the suction 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 ap-
prox. 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
position.
192 | Task Description | MS150068/01E 2014-01