TM 10-3930-659-20 10-13.    BRAKE VALVES-TO-HYDRAULIC RESERVOIR HOSES AND FITTINGS REPLACEMENT (Con't). 2. Hold boot (2) of right brake pedal (1) with hand and    pump    left    brake    pedal    (4)    75    times. Release boot. 3. Remove hose (18) and two preformed packings (17 and 19) from adapters (16 and 20).  Discard preformed 4. Remove  adapter  (16)  and  preformed  packing  (15)  from  hydraulic  reservoir  (14).    Discard  preformed  packing. packings. 5. Remove adapter (20) and preformed packing (21) from left brake valve (5).  Discard preformed packing. 6. Remove  hose  (10)  and  two  preformed  packings  (9  and  11)  from  adapters  (8  and  12).    Discard  preformed packings. 10-39