Cadillac 60 Series 1963 Shop Manual page 432

HEATING AND AIR CONDITIONING
13-51
Inner Gear
Cavity
Between
Gear Teeth
(3 O'Clock)
Fig. 13-74 Positioning O i l Pump Gears
NOTE: If rear head assembly will not slide
down over dowels in internal mechanism, twist
front head assembly back and forth very slightly
by hand until rear head drops over dowel pins.
25. Install nuts on threaded shell studs and
tighten evenly to 20 foot-pounds torque using a
0-25 foot-pounds torque wrench.
26. Invert compressor in Holding Fixture and
install shaft seal as described in Note 36b.
27. Install compressor clutch coil and housing
assembly as described in Note 35b.
28. Install compressor pulley and bearing as-
sembly as described in Note 33b.
29. Install compressor clutch plate and hub
assembly as described in Note 32b.
30. Add 525 viscosity refrigeration oil as de-
scribed in Note 25.
31. Check for external and internal leaks as
described in Note 43.
43. Compressor Leak Testing (External
and Internal)
1. Rotate clutch hub clockwise several turns to
pick oil up from sump and carry it to piston rings
and oil seals.
4. Connect Charging Station high and low pres-
sure lines to corresponding fittings on Test Plate.
NOTE: High pressure fitting is one farthest
from high pressure relief valve on compressor
rear head.
5. Open valve 1 (low pressure control), valve 2
(high pressure control), and valve 4 on Charging
Station to allow refrigerant vapor to flow into
compressor.
6. Using Leak Detector Torch, J-6084, check
for leaks at pressure relief valve, oil drain fitting,
compressor rear head seal, compressor front
head seal and compressor shaft seal. After check-
ing, shut off valve 1 and valve 2 on Charging
Station.
7. If an external leak is present, perform the
necessary corrective procedures and repeat steps
1 through 6 to make certain leak has been cor-
rected before proceeding with steps 8 through 12
to check for internal leaks.
8. Disconnect manifold gage hoses from Test
Plate.
9. Connect low pressure hose of gage manifold
set to high pressure fitting on Test Plate, J-9527.
10. Open Charging Station valve 1 (low pressure
control) to allow refrigerant vapor to flow into
compressor.
11. Observe reading on pressure gage then
close valve 1. If gage reading drops to 10 pounds
or under in 30 seconds or less, it indicates that
compressor is leaking internally, at one or more
of the following points:
a. Reed valves.
b. Teflon seals at front or rear head.
c. Crossover tube.
d. Raised section on cylinder face.
12. If a leak is indicated in step 11, perform
necessary corrective procedures to eliminate in-
ternal leak and repeat steps 1 through 11 to make
certain external and internal leaks are corrected.
If no leak was indicated, proceed with step 13.
13. Disconnect Charging Station f r o m T e s t
Plate.
14. Remove Test Plate from compressor.
2. Remove adapter plate from rear head of
compressor, if not already removed, and install
Test Plate, J-9527.
3. Attach center hose of gage manifold set on
Charging Station to a refrigerant drum standing
in an upright position and open valve on drum.
44. Front Suction Throttling Valve Front
Removal and Installation
(Fig. 13-14)
a. Removal
1. Purge system as described in Note 19.