SM421 Operation HandbookPART VI Additional Check Points556. Operating the machine after changing the reel- When you close the reel arm after reel change, you should lift it slightly.Check PointsThe machine will operate only if you lift the reel armupwards when you close the reel hanger.Slow SwingPART VI. Additional Check PointsIf you try to close the arm too hard, you may damage the reel stopper.Caution