Compressor, Reservoir And Regulator Valve Assembly; Disassembly Of Compressor Into Major Components; Disassembly Of Piston--Diaphragm Assembly; Disassembly Of First Stage Housing And Valve Mechanism - Pontiac Grand Prix Service Manual

4-8
1969
PONTIAC SERVICE MANUAL
NOTE: Tubing may be reinstalled at its connections. I f
tubing is cracked at end, it will be necessary to cut flush
and use a new metal sleeve and rubber seal to assemble
as described above. Be careful not to remove too much or
tubing may be kinked or broken at full suspension
travel. Care should be taken that proper routing is
followed in areas close to the exhaust system to prevent
burning the tubing. Note particularly the areas at rear
suspension crossmember.
COMPRESSOR, RESERVOIR AND REGULATOR
VALVE ASSEMBLY
REMOVE
1. Deflate system through service valve (Figs. 4-12 and
4- 13).
2. Disconnect high pressure line at pressure regulator
valve. Also disconnect vacuum line at compressor.
3. Remove upper bracket screw securing assembly to
car and withdraw assembly.
DISASSEMBLY OF COMPRESSOR INTO MAJOR
COMPONENTS
The compressor (Fig. 4-14) is a precision-built mecha-
nism that should be carefully handled and assembled.
Care must be taken to prevent entrance of dirt or other
foreign matter.
NOTE: This unit must not be lubricated as it is designed
to operate dry.
1. Remove compressor as outlined above.
2. Remove two adapters and flexible mounts on
compressor end of assembly.
3. Remove nuts from three reservoir retaining (long)
bolts. The bolts enter from reservoir flange side of
unit.
4, Remove nuts from thiee compressor retaining
(short) bolts. These bolts enter from compressor side of
C4 UTION: DO NOT attempt to turn snort bolts as they
have a second nut hidden between reservoir flange and
second stage housing. Always remove nuts fiom bolts
while holding bolts stationary.
5. Separate compressor assembly and reservoir. Dis-
card reservoir sealing O-ring.
6. Remove cover retaining screw. Remove cover and
discard cover gasket.
7. Remove three compressor retaining (short) bolts
that hold fmt and second stage housings together.
8. Separate first and second stage housings by sliding
second stage housing straight off piston.
9. Remove two pressure regulator valve assembly
retaining screws. Remove valve assembly from second
stage housing and discard O-ring seal.
10. Disconnect distributor arm tension spring from
swivel arm.
11. Remove actuating arm retaining screw and arm.
12. Piston and diaphragm assembly can now be
removed from first stage housing by carefully sliding
the assembly straight out of housing.
DISASSEMBLY OF PISTON--DIAPHRAGM
ASSEMBLY
1. Remove diaphragm retainer with diagonal pliers
.
.
and discard retainer (Fig. 4- 15).
2. Remove diaphragm plate, diaphragm, second
diaphragm plate and corprene washer can be dis-
carded.
4
3. Remove and discard piston seals and O-rings from
piston.
CA UTZON: Be careful not to damage piston.
4. Remove check valve in second stage end of piston
by inserting a suitable punch or piece of 3/32"
welding rod through air passage from first stage end
and taping.
DISASSEMBLY OF FIRST STAGE HOUSING AND
VALVE MECHANISM
Actuate distributor valve with finger. Valve tension
spring should press against distributor valve, holding it
against either stop. If valve action is not free and
positive, it will be necessary to rebuild using new parts
in Distributor Valve and Arm Package. If action is free
and positive and upon disassembly there are no
damaged parts, parts may be re-used.
1. Remove screw, washer, distributor arm assembly,
washer and distributor valve bushing (Fig. 4-16).
2. Remove two arm assembly stop bushing and two
distributor valve stop bushings.
3. Remove. distributor valve, being careful not to
distort valve tension spring.
4. Carefully remove valve tension spring from boss. Do
not distort spring.
NOTE: Tension spring h a one short foot and one long
foot. The short fod j t s under the distributor valve and