AUTOMATICBRAKE VALVE (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
Use silicone grease and lubricate O-rings, O-ring grooves in spool valves (15), (44), (54), (64), (76), (78), (88),
(110), (120), and bushings into which spool valves enter. Use a clean, lint-free cloth and remove excess lubricant.
Lubricate rubber check valves by placing them in a box with dry graphite and shaking the box. Remove check
valves. Wipe excess graphite off on a piece of chamois.
Do not lubricate new style emergency and suppression cams and cam dog rollers which have sandblasted
surfaces. These must remain clean and dry to retain rolling friction.
Lubricate cams and cam dogs with lime base grease.
Valve assemblies are under a spring load. Use caution during assembly procedures so that no parts fly
out, causing injury to personnel.
Assemble supply valve assembly (112) by the following:
Install seal (116) into housing (117) and secure with retainer (115).
Install O-ring (118) on housing (117).
Install housing (117) and spring cage (119) in supply valve cage (120) and secure with retaining ring (114).
Install O-ring (113) on supply valve cage (120).
Install supply valve assembly (112) in brake valve body (23) and secure with retaining ring (111).
Assemble exhaust valve assembly (100) by the following:
Install valve seal (106) in housing (107) and secure with retainer (105).
Install O-ring (108) on housing (107).
Install spring (109) and housing (107) in exhaust valve cage (110) and secure with retaining ring (104).
Install O-ring (103) on exhaust valve cage (110).