F 5.1 8
F_5.1_01_GB.fm 8-12
Replacement of the main filter:
- Untighten the filter (B) and clean its resting surface.
- Apply a thin coat of oil to the gasket of the new filter.
- Tighten the filter by hand.
A
After mounting the filter check for proper tightness during the trial run.
Venting the filter:
- Release the bayonet-mount of the manual fuel pump (F) by pressing and twisting
counter-clockwise at the same time.
- The pump piston now can be displaced by a spring.
- Until strong resistance is felt and the pump moves already very slowly.
- Keep on pumping a few times. (Fill the return pipelines).
- Start the engine and run it for about 5 minutes at idling speed or under a slight load.
- Check the tightness of the pre-filter in the meantime.
- Close the bayonet-mount of the manual fuel pump (F) by pressing and twisting
clockwise at the same time.
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