TM   10-3930-638-24&P 2-42. PARKING BRAKE MAINTENANCE (cont) b. Parking Broke Assembly (cont). STEP LOCATION ITEM ACTION REMARKS REMOVAL 2 Transmission a. Six cap screws (1) Remove Support brake drum (3) rear and lock washers (2) b. Brake drum (3) Pull and remove From brake flange (7) c. Nut (4), washer (5) Remove Use impact wrench. If impact wrench and seal (6) is not available, use ret airier bar to prevent  flange  from  turning  while loosening nut (4). Discard seal (6) d. Brake flange (7) Pull and remove From  transmission  output  shaft e. Two return springs (8) Remove Support brake shoes (9) f. Shoe and lining (9) Pull and remove From backing plate (13) and  actuating  lever (10) NOTE Remove cap screws (11), lock washers (12) and backing plate (13) only if necessary for replacement. g. Four cap screws (11) Remove Support backing plate (13) and lock washers (12) h. Backing plate (13) Remove i. Four spacers (14) Remove CLEANING 3 Brake  drum  (3),  shoe  and Clean Use hand vacuum cleaner to remove dust lining (9) and backing plate  (13) WARNING Dry cleaning solvent (P-D-680), used to clean parts is toxic and flammable. Wear protective goggles and gloves and use only in a well ventilated area. Avoid contact with skin, eyes, and clothes and don’t breathe vapors. Do not use near open flame or exces- sive heat and don’t smoke when using it. Failure to do so could cause serious injury. If you become dizzy while using cleaning solvent, get fresh air immediately, and get medical attention. If contact with skin or clothes is made, flush with large amounts of water. If contact with eyes is made, wash eyes with water immedi- ately, and obtain medical aid immediately. 2-278   Change   1