GMC 1989 Light Duty Truck Repair Manual page 31

Figure 27— Installing the Needle Bearing
1. N e ed le bearing (21) to the front cylinder (29) with
J 9 4 3 2 (figure 27).
• Support the cylinder half (29) on J 21352-A .
• Insert n eed le bearing (21).
• Insert J 9 4 3 2 into the hub end (inner side) of
the cylinder head (29) and drive the n eed le
bearing into the cylinder.
• Production com pressors use 1 /
n e e d le b e a r in g s .
interchangeable.
• R em ove cylinder half (29) from J 21352-A .
2. J 9 3 9 7 on J 9396.
3. T h e front cylinder half (29) in J 9 3 9 7 flat side down.
• The front cylinder half (29) has a long slot
extending out from the shaft hole. T h e " leg s"
of the front cylinder half (29) will point upw ard.
4. "Z ero " thrust race (27), thrust bearing (28) and
" zero" thrust race (27) to the front end of the shaft
(39) (figure
28).
• Lubricate the races (27) and the bearing (28)
with petroleum jelly.
5. Thread ed end of the shaft (39) through the n eed le
bearing (21) in the front cylinder half (29) and allow
the thrust race (27) and bearing (28) to rest on the
hub of the cylinder.
6. Insert a thrust race on the rear end of the shaft (39)
so that it rests on the hub of the axial plate.
• L u b r ic a t e th e r a c e s
petroleum jelly.
Place the balls (34) into the sockets of number one
7.
piston (figure 29).
A-6 AIR CONDITIONING COMPRESSOR 1B1-13
2
- and 5/s-inch
T h e b e a r in g s a r e
a n d b e a r in g w ith
4 0 . R a c e
41. B e a rin g
Figure 28— Installing the Rear Thrust Races
and Bearing
• Lubricate the ball sockets with 5 2 5 viscosity
refrigerant oil.
8. P lace the shoe discs (35) o ver th e ball (34) in the
front end of the piston.
• Lubricate the cavity of the shoe disc with 5 2 5
refrigerant oil.
• T h e fro n t e n d of th e piston (3 2 ) h as an
identifying notch in the casting web.
F -01595