Chevrolet Light Duty Truck 1973 Service Manual page 57

1. S h a ft N u t
2. C lutch H ub R etain er
R ing
Spacer
3.
4. C lutch H u b and D rive
Plate A ssem bly
P ulley and Bearing
5.
R etain er Ring
6. Pulley Bearing
R etainer Ring
7. Pulley Bearing
8. Pulley
C oil Housing R etain er
9.
R ing
C oil Housing
10.
Compressor Shell
11.
12. A bsorbent Sleeve
A bsorbent Sleeve
13.
R etainer
O il D rain Plug and
14.
Gasket
F ro n t Head-to-Shell
15.
" 0 " Ring
vapor to flow from the rear head of the compressor to
the front head.
Discharge Cross-Over Tube
Since the double acting pistons supply high pressure
vapor at both ends of the compressor the discharge tube
is needed to supply a path for the high pressure vapor to
pass from the front to the rear head. Should the cylinder
halves be separated during service operations a service
type discharge tube must be substituted.
Suction Reed Valves
A separate three-reed suction valve disc is assembled to
both front and rear heads. These reeds open when the
piston is on the intake portion of the stroke to allow the
16. S h a ft Seal Seat
R etain er Ring
17. S h a ft Seal Seat
S h a ft Seal
18.
19. S h a ft Seal Seat " 0 "
R ing
Compressor F ro n t
2 0.
Head
F ro n t Discharge
21.
Valve Plate
F ro n t S uction Reed
22.
Valve
2 3. Discharge Crossover
T u b e F ro n t " 0 " Ring
and Spacer
2 4 . M ainshaft F ro n t
Bearing
H ead Locating Pins
25.
2 6. F ro n t C ylin d er H alf
F ro n t T h ru st Race
27.
and Bearing Pack
S uction Crossover
28.
Cover
Fig. 3 5 -Six Cylinder Compressor -Exploded View
HEATER A ND AIR C O N D IT IO N IN G
D rive Key
2 9.
Discharge Crossover
30.
T u b e
Piston Ring
31.
Piston F ro n t D rive
32.
Ball
Piston F ro n t Ball
3 3.
Seat
Piston
34.
35. Piston R ear Ball Seat
Piston Rear D rive
36.
Ball
Piston R ing
37.
D rive S h a ft and
38.
W obble Plate
Assem bly
Rear T h ru s t Race and
39.
Bearing Pack
Rear C y lin d e r H a lf
40.
O il In le t T u b e " 0 "
41.
Ring
O il In le t T u b e
4 2 .
M ainshaft Rear
4 3.
Bearing
low pressure vapor to flow into the cylinder. When the
piston reverses and begins the compression portion of its
stroke the reed valves close against their seats, thus
preventing the high pressure vapor from being forced
back into the low side of the system.
Discharge Valves
The two discharge valve plate assemblies act to direct
high pressure vapor into the head castings. When the
piston reverses into its suction stroke the high pressure
on the opposite side of the plate causes the reeds to close
thus maintaining the differential of pressure between
high and low pressure areas. The discharge plates
include the valves and the retainers which prevent the
1A-31
44. Discharge Crossover
T u b e Rear " 0 " R ing
and Spacer
45. Rear S u c tio n Reed
Plate
46. Rear Discharge V alve
Plate
47. O il Pum p D rive Gear
O il Pum p D riven Gear
48.
Rear H ead-to-Shell
49.
" 0 " Ring
S train e r Screen
50.
51. C om pressor Rear
Head
52. Superheat S w itc h ,
" 0 " R ing and
R etain er Ring
(G Models O n ly)
53. High Pressure R elief
V alve and " 0 " Ring
R ear H ead-to-Shell
54.
R etain ing N uts
C om pressor-to-
55.
C onn ector " 0 " Ring
LIGHT DUTY TRUCK SERVICE MANUAL