TM 10-3930-659-20 10-9. BRAKE VALVES MAINTENANCE (Con't). b. DISASSEMBLY NOTE Repair  of  brake  valve  Is  limited  to  replacement  of  dust  cover  and  preformed packings contained In brake valve seal kit. 1. Remove dust cover (9) from brake valve (4).  Discard dust cover. 2. Remove adapter (11) from brake valve (4). 3. Remove preformed packing (10) from adapter (11).  Discard preformed packing. 4. Remove plug (6) and spring (8) from brake valve (4). 5. Remove preformed packing (7) from plug (6).  Discard preformed packing. c. ASSEMBLY 1. Install new preformed packing (7) on plug (6). 2. Install spring (8) and plug (6) on brake valve (4). 3. Install new preformed packing (10) on adapter (11). 4. Install adapter (11) on brake valve (4). 5. Install new dust cover (9) on brake valve (4). TA706947 10-27