Chevrolet 1977 Monte Carlo, Repair Manual

Page: 31 / 428

AIR C O N D ITIO N IN G COMPRESSOR OVERHAUL ID - 2 5
22. Install Suction Screen in rear head casting, using
care not to dam age screen.
23. C oat sealing surface on webs o f com pressor rear
head casting w ith 525 viscosity refrigerant oil.
24. Install Rear Head assem bly over studs on
com pressor shell. The tw o lower threaded com pressor
m ounting holes should be in alignm ent with the com pressor
sump.
M ake certain that suction screen does not drop out o f
place when low ering rear head into position (Figure ID -72).
If Rear H ead assembly w ill not slide down over dowels
in Internal Cylinder and Shaft A ssem bly, twist Front Head
assembly back-and-forth very slightly by-hand until Rear
Head drops over dow el pins.
25. Install nuts on threaded shell studs and tighten
evenly to 25 lb. ft. (34 N * m torque using a 0-50 lb. ft. (0-60
N *m ) torque wrench.
26. Invert com pressor in H old in g Fixture and install
com pressor Shaft Seal as described in "A-6 Com pressor
Shaft Seal" R eplacem ent procedure.
27. Install com pressor Clutch C oil and H ousing
assem bly as described in "A-6 C om pressor Clutch C oil and
H ousing Assem bly" R eplacem ent procedure.
28. Install com pressor P ulley and Bearing assembly as
described in "A-6 Com pressor Pulley and Bearing"
R eplacem ent procedure.
29. Install com pressor C lutch Plate and Hub assem bly
as described in "A-6 C om pressor Clutch Plate and H ub
Assembly" R eplacem ent procedure.
30. A dd required am ount o f 525 viscosity refrigerant
oil (see "C.C.O.T. R efrigerant O il Distribution" in the A IR
C O N D IT IO N IN G section).
31. Check for external and internal leaks as described
in the follow ing "A-6 C om pressor Leak Testing" procedure
found at the end o f this O V E R -H A U L section.
32. "Evacuating and Charge the Refrigerant System"
according to the D IS C H A R G IN G , A D D I N G OIL,
E V A C U A T IN G A N D C H A R G IN G P R O C E D U R E S
F O R C .C .O .T. A /C SYSTE M S in the A IR
C O N D IT IO N IN G section.
C A V I T Y B E T W E E N
G E A R T E E T H
(3 O 'C L O C K )
O IL S U M P
6 O 'C L O C K )
OIL DRAIN
PLUG
Figure 1D-70 Positioning A-6 Oil Pump Gears
FR O N T
HEA D
4955
SH ELL
H E A D O
F
C Y L IN D E R
A S S E M B L Y
R E A R
HEAD
S L IG H T L Y R O T A T E
F R O N T H E A D IF
N E C E S S A R Y T O
LIN E U P L O C A T O R
P IN S A N D H O L E S
5063
Figure 1D-71 A-6 Shell-To-Front Head 0-Ring Installation
Figure 1D-72 Installing A-6 Rear Head