TM  10-3930-638-24&P 2-42. PARKING BRAKE MAINTENANCE (cont) b. Parking Brake Assembly (cont). STEP LOCATION ITEM ACTION REMARKS CLEANING  (cont) 3 WARNING (cont) Wear safety glasses when drying parts with compressed air. Failure to do so could cause serious injury to eyes and possible blindness. If you hurt your eyes or if a foreign object is blown into your eyes, seek medical attention immediately. 4 Brake  drum  (3),  flange Clean Use cleaning solvent P-D-680. Dry (7), spring (8), actuating thoroughly with compressed air lever (10), backing plate (13) and all hardware INSPECTION 5 Brake  drum  (3) Inspect Replace if cracked, scored or excessively worn 6 Shoe and lining (9) Inspect Repair  if  linings  scored,  cracked,  deteri- orated or excessively worn. Replace if brake shoe cracked, or if pawl holes or lever  contact  areas  excessively  worn 7 Return  springs  (8) Inspect Replace if coils broken, or if distorted or stretched 8 Brake  flange  (7) Inspect Replace if cracked, or if spline teeth burred, chipped or excessively worn 9 Actuating lever (10) Inspect Replace if cracked or distorted, or if roller out-of-round or excessively worn 10 Backing plate (13) Inspect Replace if cracked, or if pivot points (pawls)  excessively  worn 11 All hardware Inspect Replace if cracked, worn, or if threads damaged 2-279