Rear brakes were disassembled while thoroughly wet, the best way to contain brake dust. Note the emergency/parking brake cable and axle shaft flange. Bendix drum rear brakes contain the parking brake. Parking brakes are mechanically actuated by a cable. Look carefully for seal leakage at the axle shaft. (Gear oil will ruin fresh brake lining!) Check for radial play at the axle shaft bearing. If wear is evident, replace the axle shaft bearing and seal.