McConnel PA6085 Operator's Manual page 82

Close VFR ram tap #1
Using VFR function, move the arm into its fully rearward position. Place flail head on ground ensuring
the inner VFR ram is in its fully closed position and the outer VFR ram is in its fully open position.
Operate the rearward VFR function for 5 minutes to purge air out of the system.
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