TM 10-3930-669-20 (4)   Remove screw (11) from caliper (10). WARNING Use  care  when  removing  snap  and retaining  rings.    Snap  and  retaining rings  are  under  spring  tension  and can  act  as  projectiles  when  released and could cause severe eye injury. (5)   Remove two retaining rings (12), pins (13), and brake caliper (10) from bracket (4) and disc (14). (6)   Remove spring (15) and two brake pads (16) from brake caliper (10). (7)   Remove nut (17), packing (18), and flange (19) from pinion shaft (20). (8)   Remove two nuts (21), lock washers (22), screws (23), and disc (14) from flange (18).  Discard lock washers. b.  Installation. (1)   Install disc (14) on flange (19) with two screws (23), lock washers (22), and nuts (21). (2)   Install flange (19) on pinion shaft (20) with packing (18) and nut (17). 11-27