Section 06-02: Brakes, Rear Drum | 1993 Mustang Workshop Manual |
Removal
If the drum will not come off, pry the rubber plug from the
backing plate. Insert a narrow screwdriver through the hole in the backing
plate, and disengage the adjusting lever from the adjusting screw. 
CAUTION: Be very careful not to burr, chip, or damage the notches in the
adjusting screw, otherwise the self-adjusting mechanism will not function
properly.
Installation