MTU 12 V 4000 M33F Operating Instructions Manual page 191

6.7.4 Fuel system – Venting
Preconditions
☑Engine is stopped and starting disabled.
Special tools, Material, Spare parts
Designation / Use
Diesel fuel
WARNING
Fuels are combustible.
Risk of fire and explosion!
• Avoid open flames, electrical sparks and ignition sources.
• Do not smoke.
Venting LP fuel system
1. Turn three-way cock (3) into position (C)
where both filters are operational.
2. Open threaded vent plugs (1).
3. Unlock fuel priming pump (2), screw out
handle by turning it counterclockwise.
4. Operate fuel priming pump (2) until bubble-
free fuel emerges from the threaded vent
plugs (1).
5. Close threaded vent plugs (1).
6. Screw in handle by turning it clockwise.
7. Verify that fuel priming pump (2) is locked:
Handle must be tightened.
8. Put filters back into operation:
A Right filter in operation
B Left filter in operation
Result: During operation, one filter is cut in.
MS150069/02E 2014-03 | Task Description | 191
Part No. Qty.