GMC 1976 ZEO 6083 Maintenance Manual page 104

Figure 74-Installing Needle Bearing
17 . Wash all parts to be re-used with tri-
chlorethylene, naphtha, stoddard, kerosene, or a
similar solvent. Air-dry parts using a source of clean,
dry air.
Compressor internal components may be identi-
fied by referring to Figures 39 and 40 .
GAGING OPERATION
1 . Install Compressing Fixture J-9397 on Hold-
ing Fixture J-9396 in vise. Place front cylinder half
in Compressing Fixture, flat side down . Front cylin
der half has long slot extending out from shaft hole .
2 . Secure from Service parts stock
four
ZERO
thrust races and
three
ZERO shoe discs.
Install a ZERO thrust race, thrust bearing, and
a second ZERO thrust race on front end of compres-
sor shaft. Lubricate races and bearing with pe-
trolatum .
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 (figure 75), so that it rests on hub
of axial plate. Then install thrust bearing and a sec
ond 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.
AIR CONDITIONING SYSTEM 1- 8 7
Figure 75-Installing Rear Thrust Races and Bearings
7. Lubricate cavity of a ZERO shoe disc with 525
viscosity refrigerant oil and place shoe disc over ball
in
front end
of piston (figure 76).
Front end of piston has
an identifying notch in casting web
(figure 71).
CAUTION : Exercise care in handling the Pis-
ton and Ring Assembly, particularly during
assembly into and removal from the cylin-
der bores to prevent damage to the Teflon
piston rings.
Shoe discs should not be installed on rear of piston dur-
ing following "Gaging" operation .
Figure 76-Installing Front Shoe Disc