GMC T Series 1994 Repair Manual page 36

COMPRESSOR SHAFT SEAL
Shaft Seal Design
T he shaft seal is a lip seal, one piece design.
Seal Leak Detection
A shaft seal should not be changed because of an oil-line
on the hood insulator. O nly change a shaft seal when a leak is
detected by evidence o f oil sprayed in large am ounts and then
only after actual refrigerant leakage is found by using an
approved leak D etector such as J 39400 or equivalent.
On-Vehicle
1. Recover Refrigerant.
2. Loosen and reposition com pressor in m ounting brackets,
if necessary.
3. Rem ove Clutch Plate
com pressor as described in M inor Repairs.
4. Rem ove the shaft seal seat retainer ring, using Snap Ring
Pliers J 5403.
5. Thoroughly clean inside of com pressor neck area and
O -ring groove surrounding the shaft, the exposed portion
o f the seal seat and the shaft itself. Any dirt or foreign
m aterial getting into com pressor may cause damage.
6. Rem ove Lip Seal:
Fully engage the
Rem over-Installer J 23128-A into the recessed portion
o f the Seal by turning the handle clockw ise. Remove the
Seal from the com pressor with a rotary-pulling motion.
Discard the Seal. The handle m ust be hand-tightened
securely. Do not use a wrench or plier (Fig. 27).
7. Rem ove and discard the seal seat O-ring from the
com pressor, neck using O -Ring Rem over J 9553-01.
8. R echeck the shaft and inside of the com pressor neck and
O -ring groove for dirt or foreign m aterial and be sure
these areas are perfectly clean before installing new
parts.
Inspection
Seals should not be reused. A lw ays use a new
specification service seal kit on rebuild. Care should be taken to
prevent dam age to the lip of the one piece seal. M ake sure that
the Seal Seat and Seal Lip are free o f lint and dirt that could
dam age the seal surface or prevent sealing.
On-Vehicle
E3
Install or Connect
Dip the new seal O -ring in clean 525 viscosity refrigerant
oil and assem ble
J 33011 (Fig. 27).
and Hub assem bly from
knurled tangs of Seal
onto O-Ring Installer
1-SEAL 3 -J 9553-01
2 - J 23128-A 4-O -R IN G
Fig. 27 Removing and Installing Seal and O-Ring
(One Piece Seal)
5 - J 33011
6_J 34614