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1 8-44
1977 PONTIAC SERVICE MANUAL
Fig. 1 B-60 1977 A-6 Parts Tray
Fig. 18-6 1 Removing 1977 ~6 Front Thrust ~ G e s and
Bearings
14. Remove discharge cross-over tube from cylinder
half, using self-clamping pliers.
This is necessary only on original factory
equipment, as ends of the tube are swedged into cylinder
halves. The discharge cross-over tube in internal mechanism
assemblies that have been previously serviced have an O-
ring and bushing at EACH END of the tube, and can be
easily removed by hand (see Fig. 1B-80).
15. Examine piston bores and needle bearings in front
and rear cylinder halves. Replace front and rear cylinder
halves. Replace front and rear cylinders if any cylinder bore
is deeply scored or damaged.
16. Needle bearings may be removed if necessary by
driving them out with special Thin-Wall Socket
J
9399. Insert
socket in hub end (inner side) of cylinder head and drive
bearing out. To install needle bearing, place cylinder half on
Support Block J 21352, and insert bearing in end of cylinder
head with bearing
identification marks UP. Use Needle Bearing
Installer J 9432 and drive bearing into cylinder head (Fig.
1B-62), until tool bottoms on the cylinder face.
Two different width needle bearings are used in
Production compressors
-
a 1/2" size and a 5/8" size. The
bearings ARE interchanges ble. Service replacement
bearings are all 1/2".
NEEDLE BEAR1
INSTALLER
J-9
NEEDLE BEARING
BLOCK
J-2 1352
Fig. 18-62 Installing 1977 A-6 Needle Bearing
17. Wash all parts to be re-used with trichlorethylene,
naphtha, stoddard solvent, kerosene, or a similar solvent. Air-
dry parts using a source of clean, dry air.
Compressor internal components may be identified by
referred to Fig. 1B-27 and Fig. 1B-28.
A-6 COMRESSOR INTERNAL
MECHANISM
GAGING OPERATION
1. Install Compressing Fixture J 9397 on Holding
Fixture J 9396 in vise. Place front cylinder half in
Compressing Fixture, flat side down. Front cylinder half has
long slot extending out from shaft hole.
2. Secure from Service parts stock four ZERO thrust
races and
three ZERO shoe discs.
3. Intall a ZERO thrust race, thrust bearing, and a
second ZERO thrust race on front end of compressor shaft.
Lubricate races and bearing with petrolatum.
4. Insert threaded end of shaft through needle bearing
in front cylinder half, and allow thrust race and bearing
assembly to rest on hub of cylinder.
5. Now install a ZERO thrust race on rear end of
compressor shaft (Fig. 1B-63), so that it rests on hub of axial
plate. Then install thrust bearing and a second ZERO thrust
race. Lubricate races and bearing with petrolatum.
6. Lubricate ball pockets of the No. 1 Piston with 525
viscosity refrigerant oil and place a ball in each socket. Use
balls previously removed if they are to be re-used.
7. Lubricate cavity of a ZERO shoe disc with 525
viscosity refrigerant oil and place show disc over ball in front
end of piston (Fig. 1B-64).
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