Pontiac FIREBIRD 1972 Service Manual page 133

1A-74 1972 PONTIAC SERVICE MANUAL
to prevent any dirt or foreign material from getting
into compressor.
7. Remove shaft seal seat using J 23128. Insert the
knurled collet into the recess in the seal and tighten
the knurled handle as tightly as possible by hand and
remove seal seat with a twisting motion (Fig. 1A-72).
8. Engage tabs on shaft seal assembly with locking tangs
on J 9392 seal installer and remover. Press down on
tool and twist clockwise to engage seal. Remove seal
assembly by pulling straight out from shaft (Fig. 1A-
73).
9. Remove O-ring from interior of compressor neck us-
ing J 9553. (A wire with a hook formed on end may
be used. This hook may be made in a manner shown
in Fig. 1A-74.)
10. Re-check the shaft and inside of the compressor neck
for dirt or foreign material and be sure these areas are
perfectly clean before installing new parts.
REPLACE:
1. Coat the new seal seat O-ring with clean refrigeration
oil and install it in its groove in the compressor neck.
Tool J 21508 may be used.
2. Place seal protector J 25574 over end of shaft. Coat
the O-ring and seal face of the new seal assembly with
clean refrigeration oil and install new seal assembly
on the shaft, using J 9392. NOTE: Take care to pre-
vent chipping ceramic seal seat.
Fig. 1A-74 Removing 0-Ring Seal
Coat the seal face of the new seal seat with clean
refrigeration oil and install the new seal seat, using J
23128. Be sure the seal seat O-ring is not dislodged
and seal seat is making a good seal with O-ring.
Install new seal seat retainer ring, using J 5403 (No.
21 pliers), with flat face against seal seat. The sleeve
from J 9393 may be used to press on retainer ring so
that it snaps into place. Remove seal protector J
25574 from end of shaft.
Leak test compressor and correct any leaks found.
Wipe out any excess oil inside the compressor neck
and on the shaft.
Install new absorbent sleeve by rolling the material
into a cylinder, overlapping ends and slipping sleeve
into compressor neck with overlap toward top of
compressor. With a small screwdriver or similar in-
strument carefully spread sleeve to remove the over-
lap so that in the final position the ends of sleeve will
butt at top vertical centerline.
Position new metal sleeve retainer so that its flange
face will be against the front end of the sleeve. Tool
J 9395 or the sleeve from J 9393 may be used to install
the retainer. Press and tap with a mallet, setting the
retainer and sleeve into place, until the outer edge of
the retainer is recessed approximately 1/32" from the
face of the compressor neck.
Reinstall the hub and drive plate assembly.
Evacuate and charge refrigeration system.
Perform leak test. Check system operation.
Disconnect jumper wire and restore thermal limiter
connection.
COMPRESSOR ASSEMBLY-OVERHAUL
The following operations are based on the use of recom-
mended service tools and the availability of an adequate
stock of service parts.
Service parts should include:
1. Standard size piston drive balls.
2. Shoe discs--total of 10 sizes, including ZERO shoe.
3. Thrust races--total of 14 sizes, including the ZERO
ra'ce.
4. Pistons--both standard head and re-expansion heads.
5. Main shaft-needle bearings.
6. Thrust bearings.