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2.
Release threaded vent plugs (2, 3) and un-
screw at least one rotation.
Note:
• Only operate the fuel priming pump man-
ually!
• Only hold the pump plunger vertically to
avoid damaging the pump!
3.
Unlock fuel priming pump, screw out han-
dle (1).
Note:
Catch escaping fuel with a suitable rag.
4.
Operate fuel priming pump handle (1) until
bubble-free fuel emerges from the threaded
vent plugs (2, 3).
Note:
Never actuate the handle with the threaded
vent plugs closed!
5.
Move handle (1) of fuel priming pump back
and screw in.
6.
Close threaded vent plugs (2, 3) and tighten
by hand.
Venting fuel prefilter with high
pressure, version B
1.
Open fuel supply as necessary.
2.
Carefully release threaded vent plugs (1) and
unscrew at least one rotation.
3.
Leave threaded vent plugs (1) opened until
bubble-free fuel emerges at the vent plugs.
4.
Close threaded vent plugs (1) and tighten by
hand.
156 | Fuel Filter | MS15054/03E 2018-07
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