thus allowing the actuator tab 24 to drop since the solenoid 18 is de energized in fig8 the selector key 26 is still engaged by the selector shaft 12 and at this point the upper air valve plate 62 shifts again turning the primary feed air flow back on as previously since the clockwise rotation of the drive shaft 14 and the feed wheel 15 is continuing the primary feed air flow is delivering prefed yarn which had been stored in the prefeed and pullback storage pocket 94 while continuing to feed yarn that is still being delivered by the feed wheel 15 during the last 60 u00b0 of machine time the yarn is delivered directly into the yarn tube 102 without going into the prefeed and pullback storage pocket 94 with reference to fig9 the rotation of the selector shaft 12 in its counterclockwise direction begins and after the completed clockwise motion of the yarn feed wheel 15 is finished the counterclockwise motion of the drive shaft 14 begins as can be seen the counterclockwise rotation of the selector shaft 12 allows the selector key 26 and the selector plunger 16 to be biased to the right by spring 34 as this occurs the valve stem 84 moves to the right and port 86 moves from the prefeed channel 78 to the pullback channel 80 insofar as the tufting cycle is concerned at this time severance of the yarn has been completed and once the pullback air is on the yarn is pulled back through yarn tube 102 to clear the common throat area see fig1 adjacent the tufting station the cam and lock arm 46 and the engaging member 48 are headed to their rest positions as the drive shaft 14 moves.