TM 10-3930-659-20 10-12.    LEFT BRAKE VALVE-TO-RIGHT BRAKE VALVE HOSES AND FITTINGS REPLACEMENT. NOTE •  It  Is  necessary  to  hold  boot  of  one  brake  pedal  with  hand  while  opposite brake pedal Is pumped.  Movement Inside boot will be felt as opposite brake pedal Is pumped. Accumulator pressure Is relieved when movement stops. • Each brake pedal should be pumped a full 75 times even If no movement Is felt after pumping brake pedal several times. 1. Hold  boot  (3)  of  left  brake  pedal  (4)  with  hand and   pump   right   brake   pedal   (1)   75   times. Release boot. 2. Hold boot (2) of right brake pedal (1) with hand and    pump    left    brake    pedal    (4)    75    times. Release boot. 3. Remove hose (5) and two preformed packings (7 and 20) from tee (8) and elbow (19).  Discard preformed 4. Remove tee (8) and preformed packing (9) from right brake valve (10).  Discard preformed packing. packings. 5. Remove elbow (19) and preformed packing (16) from left brake valve (14).  Discard preformed packing. 6. Remove hose (6) and two preformed packings (13 and 18) from elbow (12) and tee (17).  Discard preformed 7. Remove  elbow  (12)  and  preformed  packing  (11)  from  right  brake  valve  (10).    Discard  preformed  packing. packings. 8. Remove tee (17) and preformed packing (15) from left brake valve (14).  Discard preformed packing. b. INSTALLATION 1. Install new preformed packing (15) and tee (17) on left brake valve (14). 2. Install new preformed packing (11) and elbow (12) on right brake valve (10). 3. Install two new preformed packings (13 and 18) and hose (6) on elbow (12) and tee (17). TA706953 10-36