GMC 1982 Light Duty Truck Service Manual page 111

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S H A F T S E A L
P R O T E C T O R
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I N S T A L L E R
Fig. 1C1-31 Removing & Installing Seal (Off Car)
Fig. 1C 1-33 Compressor Leak Testing Fixture
8. Using J-5403 snap ring pliers, install switch retaining ring
with high point of curved sides adjacent to the switch
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m L E A K T E S T
A D A P T E R
J 9625
| 2 | H I G H
P R E S S U R E
C U T - O F F
S W I T C H
N O T I C E : H I G H
P R E S S U R E
C U T - O F F
S W I T C H
I N S U L A T O R S
A R E C O L O R E D
R E D
2 1 0 4 5 6
AIR C O N D ITIO N IN G COMPRESSOR O VERHAUL 1C 1-13
housing. Be sure retaining ring is properly seated in the
switch cavity retainer ring groove.
Fig. 1C 1-34 High Pressure Cut-Off Switch and Retainer
R-4 C O M P R E S S O R F R O N T H E A D A N D /O R 0 -
R IN G
Remove
1. "Discharge the Refrigerant System" according to the
directions in Section 1B1.
2. Perform steps 1 through 4 of "R-4 Compressor Clutch Rotor
and/or Bearing" Removal procedure but do not loosen or
remove the pulley rim mounting screws so as to remove the
Clutch Rotor and Bearing, Clutch Coil and Pulley Rim as
a total assembly. Be careful not to drop the Puller Guide J
25031, when removing the assembly.
3. Remove and discard the Shaft Seal parts as described in "R-4
Compressor Shaft Seal" Removal procedure.
4. Remove the four front head mounting screws (Fig. 1C1-35)
and remove the Front Head assembly (Fig. 1C1-36).
5. Remove and discard the front head O-ring.
Replace
1. Check the Front Head and compressor cylinder area for any
dirt, lint, etc. and clean, if necessary. Install a new Service
thrust washer kit, if required, as described in "R-4
Compressor Thrust and Belleville Washers" Removal and
Replacement procedures.
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R E D I N S U L A T O R
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H I G H P R E S S U R E
C U T - O F F S W I T C H
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S W I T C H
R E T A I N I N G
R I N G
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