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1 8-64
1977 PONTIAC SERVICE MANUAL
:ig. 18-1
20
Removing & Installing 1 9 7 7 R-4 Shaft Seal
(Off Car)
Fig. 18-1 2 1 Installing 1 9 7 7 R-4 Shaft Seal Seat 0-Ring
(Off Car)
the locking tangs of J 9392 Seal Remover and Installer as
shown in Fig. 1B-121.
4. Install Shaft Seal Protector, J 22974, over the end of
the compressor shaft and slide the shaft seal onto the shaft.
Slowly turn the tool clockwise while applying light pressure
until the seal engages the flats of the compressor shaft and
can be seated into place. Rotate counterclockwise to
disengage the tool from the seal tabs and remove the tool.
5. Attach the new ceramic seal seat to Seal Seat Remover
and Installer, J 23128, and dip the seal seat in clean
refrigerant oil to coat the seal face and outer surface.
Carefully install the seal seat over the compressor shaft and
seal protector and push the seat into place with a rotary
motion. Remove J 23128 and J 22974.
6. Install the new seal seat retainer ring with Snap Ring
Pliers, J 5403 (#21).
7. Reinstall the clutch plate and hub assembly.
R 4 COMPRESSOR PRESSURE RELIEF
VALVE
Remove and Replace
1. "Discharge the Refrigerant System" according to the
"DISCHARGING, EVACUATING AND CHARGING
PROCEDURES FOR C.C.O.T. A/C SYSTEMS".
2. Remove pressure relief valve from rear of wmpressor.
3. Remove and discard pressure relief valve O-nng seal.
4. Coat new O-ring seal with clean 525 viscosity
refrigerant oil and install on valve.
5. Install pressure relief valve.
6. "Evacuate and Charge Refrigerant System" according
to above procedures.
R-4 COMPRESSOR FRONT HEAD AND/
OR O-RING
Remove
1. Perform steps 1 through 4 of "Clutch Rotor and/or
Bearing" Removal procedure (but do not loosen or remove
the pulley rim mounting screws) to remove the clutch rotor,
coil and pulley rim as a total assembly. Be careful not to drop
the Puller Guide, J 2503 1, when removing the assembly.
2. Remove and discard the shaft seal kit parts according
to procedure
(see
"Shaft Seal" Removal procedure).
3. Remove the four front head mounting screws (Fig.
1B-122) and remove the front head assembly (Fig. 1B-123).
4. Remove and discard the front head O-ring seal.
Replace
1. Check the front head and compressor cylinder area
for any dirt, lint, etc. and clean, if necessary. Install a new
thrust washer kit, if required, as described in "Thrust and
Belleville Washers".
2. Dip the new front head O-ring seal in clean 525
viscosity refrigerant oil and install in the seal groove on the
front head (Fig. 1B-123).
3. Position the oil hole in the front head to be "up" when
assembled to the wmpressor cylinder to correspond with the
"up" position of the compressor. Install the front head and
tighten the front head mounting screws to an 18-22 foot
pound torque.
4. Install new shaft seal kit parts (Fig. 1B-44) according
to "Shaft Seal" Replacement procedure.
5. Install he clutch rotor and bearing assembly, clutch
coil and pulley rim assembly to the front head using Rotor
and Bearing Installer J 26271 (Fig. 1B-111).
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