GMC 1976 ZEO 6083 Maintenance Manual page 113

1- 9 6 AIR CONDITIONING SYSTEM
Figure 102-Installing Compressor Shell
13 . Install new O-ring in oil pick-up tube cavity .
14 . Lubricate oil pick-up tube with 525 viscosity
refrigerant oil and install into cavity, rotating com-
pressor mechanism to align tube with hole in shell
baffle (figure 103) .
15 . Install new O-ring and bushing on rear-end
of
discharge cross-over tube (See figure 92) .
16 . Install rear suction reed over dowel pins, with
slot TOWARDS sump .
17 . Install rear discharge valve plate assembly
over dowel pins,
with reed retainers UP .
18 . Position inner oil pump gear over shaft with
previously applied identification
mark UP.
Figure 103-Installing Oil Pick-Up Tube
Figure 104-Positioning Oil Pump Gears
19 . Position outer oil pump gear over inner gear
with previously applied identification
mark UP
and,
when standing facing oil sump, position outer gear so
that it meshes with inner gear at the 9-o'clock posi-
tion, and resulting cavity between gear teeth is then
at 3-o'clock position (figure 104) .
20 . Generously oil rear discharge valve plate as-
sembly with 525 viscosity refrigerant oil around
outer edge where large diameter O-ring will be
placed . Oil the valve reeds, pump gears, and area
where sealing surface will contact rear discharge
valve plate.
21 . Using the 525 oil, lubricate new head to-shell
O-ring and install on rear discharge valve plate, in
contact with shell (figure 105) .
22 . Install suction screen in rear head casting,
using care not to damage screen .
24 . Coat sealing surface on webs of compressor
rear head casting with 525 viscosity refrigerant oil.
24 . Install rear head assembly over studs on com-
pressor shell.
The two lower threaded compressor mount-
ing holes should be in alignment with the compressor sump.
Make certain that suction screen does not dop
out of place when lowering rear head into position
(figure 106) .
If rear head assembly will not slide down over
dowels in internal mechanism, twist front head as-
sembly back-and-forth very slightly by-hand until
rear head drops over dowel pins .
25 . Install nuts on threaded whell studs and
tighten evenly to 25 lb. ft . torque using a 0-50 lb . ft .
torque wrench .
26 . Invert compressor in Holding Fixture and