Chevrolet 1977 Monte Carlo, Repair Manual

Page: 16 / 428

1D-10 AIR C O N D ITIO N IN G COMPRESSOR OVERHAUL
Figure 1D-22 Removing A-6 Shaft Seal Seat and O-Ring
Figure 1D-23 Replacing A-6 Seal and O-Ring
Inspection
Seals should not be reused. A lw ays use a new seal kit
on rebuild (see Figure ID -20). Be extrem ely careful that the
face o f the Seal to be installed is not scratched or damaged
in any way. M ake sure that the Seal Seat and Seal are free
o f lint and dirt that could dam age the seal surface or prevent
sealing.
Replace
1. Coat the new seal seat O-ring in clean 525 viscosity
referigerant oil and assem ble on to O -R ing Installer J -2 1508
(see Figure ID -23).
2. Insert the O -R ing Installer J-21508
completely
down
into the com pressor neck until the installer
"bottoms". Low er the m ovable slide o f the O -Ring Installer
to release the O-ring into the seal seat O-ring
lower
groove.
(The com pressor neck top groove is for the shaft seal
retainer ring). R otate the Installer to seat the O-ring and
remove Installer (See Figure ID -24).
3. Coat the O-ring and seal face o f the new Seal
assem bly with clean 525 viscosity refrigerant oil. Carefully
m ount the Seal assem bly to Seal Installer J-9392 by engaging
the tabs o f the Seal w ith the tangs o f the Installer (Figure
ID -23).
4. Place Seal Protector J-22974 (Figure ID -23) over
end o f com pressor shaft and carefully slide the new Seal
assembly dow n onto the shaft. G en tly twist the Installer
J-9392 C L O C K -W ISE , w hile pushing the seal assem bly
down the shaft until the Seal assem bly engages the flats on
the shaft and is seated in place. D isengage the Installer by
pressing downw ard and twisting counter-clockw ise.
5. A ttach the ceram ic Seal Seat to the Seal Seat
R em over and Installer J-23128 and dip the ceramic Seat in
clean 525 viscosity refrigerant oil to coat the seal face and
outer surface. Carefully install the Seat over the com pressor
shaft end and Seal Protector J-22974 and push the Seat into
place with a rotary m otion. Take care not to dislodge the
seat O-ring. H ow ever, be sure Seal Seat m akes a good seal
with O-ring. R em ove Installer J-23128 and Seal Protector
J-22974 (Figure ID -22).
6. Install the new seal seat retainer ring
with its flat
side against the Seal Seat,
using Snap-R ing Pliers J-5403
( # 2 1 ) . See Figure ID -21. U se the sleeve from Seal Seat
R em over-Installer J -2 3 128 (Figure ID -2 2 ) to press in on the
seal seat retainer ring so that it snaps into its groove.
7. Install C om pressor Leak Test Fixture J-9625 (Figure
ID -25) on rear head o f com pressor and connect gage
charging lines or pressurize S U C T IO N S ID E (low-pressure
side) o f com pressor on vehicle w ith R efrigerant-12 vapor to
equalize pressure to the drum pressure. Temporarily install
the shaft nut and, with com pressor in horizontal position
and oil sum p dow n, rotate the com pressor shaft in normal
direction o f rotation several tim es by hand. Leak test the
Seal with Electronic Leak D etector J-23400. Correct any
leak found. R em ove, discard and later replace the shaft nut.
8. R em ove any excess oil, resulting from installing the
new seal parts, from the shaft and inside the com pressor
neck.
9. Install the new absorbent sleeve by rolling the
material into a cylinder, overlapping the ends, and then
slipping the sleeve into the com pressor neck with the overlap
towards the top o f the com pressor. W ith a sm all screwdriver