Chevrolet Light Duty Truck 1973 Service Manual page 55

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1. Rear Head
2. Rear Head to Shell " O " Ring
Rear Discharge Valve Plate
3.
4. Rear Suction Reed Plate
Piston Ring
5.
Piston Drive Ball
6.
7. Ball Seat
Piston
8.
Front Suction Reed Plate
9.
Front Discharge Valve Plate
10.
Front Head to Shell " O " Ring
11.
12. F ront Head
Coil and Housing Assembly
13.
Coil Housing Retainer Ring
14.
located in an internal groove in the neck of the front
head provides a seal with the outer diam eter of the seal
seat. A retainer ring, tapered side away from the seat,
secures the seat in place. The hub and armature plate
must be removed to gain access to the seal. A shaft seal
kit contains all necessary replacement parts for field
service.
After removing the clutch drive, pulley-bearing and coil
housing assemblies, the rear head and internal
mechanism (fig. 34) may be removed from the
compressor shell. Four threaded stu4s, welded to the
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2 5 2 6 2 7 2 8
Pulley and Bearing Assembly
15.
Pulley Bearing
16.
Pulley Bearing Retainer Ring
17.
18. Pulley and Bearing Retainer Ring
Clutch Hub and Drive Plate Assembly
19.
Super Heat Switch, " O " Ring and
20.
Retainer Ring (G Models Only)
High Pressure Relief Valve
21.
22. Oil Pump Gears
Mainshaft Bearing (Rear)
23.
24. Oil Inlet Tube " 0 " Ring
25. Oil Inlet Tube
Wobble Plate and Mainshaft Assembly
26.
27. Thrust Race
Fig. 34 -Six Cylinder Compressor- Cross Sectional View
HEATER A ND AIR C O N D IT IO N IN G
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2 9 3 0 31 32
compressor shell, locate the rear head and four lock nuts
secure it in place.
Rear Head
The rear head (fig. 35) has a machined cavity in the
center for the oil pump gears. This cavity, in all
compressors, is machined so that the eccentricity of the
bore is approximately .042 inch to the LEFT of the
centerline of the cavity. The counterclockwise rotation
compressor used in some other systems has the
eccentricity machined approximately .042 inch to the
RIGHT of the cavity centerline. A small diameter hole is
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3 3 3 4 35 3 6 37 38 3 9
Thrust Bearing
28.
Thrust Race
29.
Compressor Shell
30.
C ylinder Assembly
31.
32. Shaft Seal
33. Shaft Seal Seat " 0 " Ring
34. Shaft Seal Seat
Shaft Seal Seat Retainer Ring
35.
Absorbent Sleeve
36.
Absorbent Sleeve Retainer
37.
38. Spacer
Clutch Hub Retainer Ring
39.
40. Shaft Nut
LIGHT DUTY TRUCK SERVICE MANUAL
1A-29
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