Chevrolet Chevelle 1977 Repair Manual page 31

J -9 4 8 0 -1
Fig. 7 2 — 1 nstallin g Clu tch Plate and Hub A s s e m b ly
6. Install a new shaft nut with the small diameter boss
of nut against crankshaft shoulder, using special thin wall
socket J-9399. Hold clutch plate and hub assembly with
clutch hub holding tool J-25030 and tighten to 8-12 foot
pounds torque.
COMPRESSOR SHAFT SEAL ASSEMBLY
Removal
When replacing shaft seal assembly, it will be necessary
to discharge the refrigerant from the system before replacing
shaft seal assembly or removing compressor from vehicle.
1. Discharge the system and remove clutch plate and
hub assembly as described under "Compressor Clutch Plate
and Hub Assembly".
2. Remove shaft seal seat retainer ring using snap ring
pliers J-5403.
3. Thoroughly clean the inside of compressor neck area
surrounding compressor shaft, seal seat and shaft, to remove
all dirt and foreign material before removing seal seat.
4. Insert seal seat remover and install tool J-23128 (Fig.
73) over the shaft into the recessed area of seal seat and
tighten tool clockwise to securely engage knurled tangs of
tool with the seal seat. Remove seal seat with a twisting and
pull motion. Discard seat.
5. Insert seal remover and installer J-9392 (Fig. 74)
over shaft and engage shaft seal by pressing downward on
tool to overcome shaft seal spring pressure and turn tool
clockwise to engage seal assembly tabs with tangs of tool.
Remove seal assembly by pulling straight out from
compressor shaft (Fig. 74). Discard seal.
6. Remove seal seat "O" ring from compressor neck
using tool J-9553. Discard "O" ring.
Installation
Inspect the inside of compressor neck and shaft area
for any lint, dirt or foreign material and be sure these areas
are perfectly clean before installing new seal parts. Be sure
seal remover and installer J-9392, seal protector J-22974 and
"O" ring installer J-21508 are clean internally and
externally. The seal seat "O" ring, shaft seal and seal seat
should be dipped in clean 525 Viscosity oil and not handled
any more than is absolutely necessary by hand, particularly
the mating surfaces. Any dirt or lint on sealing surfaces
AIR CONDITIONING
J - 9 4 8 0 - 2
A IR G A P ( .0 2 0 " —
. 0 4 0 " )
J-23128
CERAMIC
SEAL SEAT
J-22974
Fig. 73--Rem ovin g Seal Seat
could cause a seal leak or seal damage.
1. Dip new seal seat "O" ring in clean 525 Viscosity
oil and assemble onto "O" ring installer J-21508 (Fig. 75).
2. Insert "O" ring installer J-21508 into the compressor
neck until the tool "bottom s". Lower the movable slide of
"O" ring installer to release "O" ring into seal seat "O" ring
groove. R otate installer tool to seat "O" ring and remove
tool. Inspect the internal neck area for cleanliness and
proper "O" ring positioning.
3. Dip new shaft seal "0 " ring and seal face in clean
525 Viscosity oil and carefully engage shaft seal assembly
with locking tangs of seal remover and installer J-9392 (Fig.
75).
SHAFT SEAL
J-22974
Fig. 74-R em oving Shaft Seal
1B-25