TM 10-3930-671-24 Service Brake Adjustment (cont’d) TA1 8 Transaxle Figure 2.  Service Brake Access Openings in Wheel Hub Adjustment Thru Wheel Hub NOTE Openings   in   the   wheel   hub/brake   drum   have been  provided  for  easier  access  to  check  and adjust  the  service    brakes  from  the  outer  side. The  opening  is  enclosed  with  a  dust  cover  held in place by a single screw. 1. Remove   wheel   and   tire   assembly   from   wheel hub. 2. Remove   dust   cover   from   access   opening   in wheel  hub/brake drum 3. Use   a   feeler   (thickness)   gauge   to   check   the clearance between each shoe and drum.  Use a screwdriver    or    equivalent    tool    to    rotate    the adjustor ratchet  wheel in the brake. 4. Use a tool with a hook to pull on and release the ratchet  pawl  when  it  is  necessary  to   back   off adjustment (increase clearance) of the brake. NOTE Do not overtighten brakes.  It is very difficult to release   the   ratchet   wheel   pawl   and   back   off adjustment of the brake. 5. Carefully adjust clearance between brake shoes and   drum   to   .010-.012   in.      (0.255-0.304   mm) measured at slot opening.  Move slot by rotating brake   drum   to   check   clearance,   at   positions shown by Fig.4, on each brake shoe. 6. After   adjusting   brakes,   install   dust   cover   over access opening in wheel hub. 7. Install   wheel   and   tire   assembly   on   drive   axle wheel hub. 8. Install  wheel  mounting  lug  nuts  and  tighten  to torque spec:  470-530 Ib-ft (637-718 N-m). F-393