Ford Motor Co.: E250/350
Tighten adjusting nut to 120-140 ft.lbs. while rotating brake drum. Back off adjusting nut to obtain 0.001 - 0.010" end play. This should require backing off nut 1/8-1/4 turn. Install locking wedge in key slot. Seat wedge using a suitable tool (T57T-1170-A) and hammer. Make sure locking wedge does not bottom against shoulder of adjusting nut.
NOTE:
The locking wedge and adjusting nut can be reused, providing that the locking wedge cuts a new groove into nylon retainer ring. If it is not possible to obtain the correct end play and install the wedge in uncut nylon, replace locking wedge and adjusting nut.