TM10-3930-660-20 12-4. PARKING BRAKE LEVER AND CABLE -  ADJUST/RBPM  (Cont’d) 3. 4. 2. a. b. c. d. e. f. g. MAKE  MAJOR  ADJUSTMENT,  IF  NECESSARY. Place lever (7) in the OFF position. Turn knob (27) on lever (7) so knob (27) is approximately at middle of its full travel. Loosen jam nut (4b) on cable (1). Tighten adjusting nut (4c) on cable (1) approximately two turns. Pull lever (7) to the on position. It should take about 50 lbs. of pulling force to set parking  brake. If necessary, repeat steps 2a through 2e until a 50 lb. pull on lever (7) is obtained. Tighten jam nut (4b). IF NECESSARY, ADJUST CLEVIS    (5) . a. b. c. Remove cotter pin (3) and clevis pin (4).   Discard cotter pin (3). Loosen locknut (28). Turn clevis in or out as required. Tighten locknut  (28). Install new cotter pin (3) and clevis pin (4). PLACE PARKING BRAKE IN ON POSITION AND REMOVE WHEEL CHOCKS. 12-9