TM  10-3930-669-20 NOTE •    Prior to adjusting forks, ensure mast is vertical. •    When   adjusting   the   carriage,   be   sure   to   keep   the   same   amount   of   tension   on   both lower/primary chains. •    The distance from end of nut to end of shaft should be a minimum of 1/4 in.  (6 mm) on each side. (5)   Loosen or tighten nuts (9) on shafts (10) at front bottom of mast assembly (2) to a minimum of ¼  in.  (6 mm) from the ground level to the rear portion of the fork. (6)   Fully extend mast (TM 10-3930-669-10) and visually check balance of mast assembly (2). (7)   If mast assembly (2) is not evenly balanced, shims must be added. 15-79