Depress inlet valve (29) and remove retaining
Remove rubber inlet and exhaust valve (10) from
ring (36) using the tru-arc pliers.
body (11).
Remove lower valve guide (35).
CLEANING AND INSPECTION
Remove lower valve spring (32).
Wash all metal parts in cleaning solvent and dry.
Wipe all rubber parts clean and clean out retaining
Remove lower valve retainer (31).
ring grooves.
Remove lower valve O-ring (33).
Inspect all parts for excessive wear or deterior-
ation.
Remove rubber inlet and exhaust valve from body
Inspect valve and valve seats for nicks and burrs.
(29).
Remove four (4) cap screws and lockwashers
C h e c k springs for cracks, distortion and cor-
(28) from lower cover (27).
rosion.
Remove lower cover (27).
Inspect exhaust check diaphragm for flexibility,
wear and deterioration.
Remove cover O-ring (26).
Inspect all rubber parts and replace if swollen,
Remove relay piston return spring (25).
deteriorated or worn.
Remove inner relay piston (23), being careful not
R e p l a c e all parts not considered serviceable
during these inspections.
to damage exhaust seat.
Remove large inner relay piston O-ring (24).
ASSEMBLY
Refer to figure 4. Prior to assembly, lubricate
Remove small inner relay piston O-ring (22).
lightly all mating surfaces, upper piston, inner and
outer relay piston, valve bores and O-rings with
Remove outer relay piston (20).
Bendix-Westinghouse recommended lubricant,
piece number 240176 (BW 204-M).
Remove outer relay piston O-ring (21).
Lower Inlet and Exhaust Valve Assembly
Using tru-arc pliers, remove upper valve retaining
ring (19).
Install rubber inlet-exhaust valve (29) on inlet and
exhaust valve body (30).
Remove upper inlet exhaust assembly (41).
Install lower valve retainer (31).
Install lower valve spring (32).
Upper Inlet and Exhaust Valve Assembly
Using tru-arc pliers, remove retaining ring (18).
Install lower valve O-ring (33) in lower valve guide
(35).
Remove upper O-ring retainer (17).
P l a c e spring (32), body (30) and retainer (31)
Remove upper O-ring (Inner and Outer) (15, 16).
over lower valve guide (35) and depress spring.
Remove washer (14).
U s i n g tru-arc pliers, snap retainer ring (36) in
place, making sure it is locked in groove of valve
Remove upper valve spring (13).
body (30).
Remove upper valve retainer (12).
Install lower valve guide O-ring (34).
Install lower inlet and exhaust valve assembly
Remove upper inlet and exhaust valve from body
(42) in the lower cover (27).
(10, 11).
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