Shaft Seal Replacement - GMC 1989 Light Duty Truck Repair Manual

• P lace the clutch coil " face d ow n" and apply
the ad h esive in a circular bead around the
three coil locator protrusions.
2. Clutch coil (8) to the front head (16) (figure 12).
• Align the coil and housing assem b ly on the
c o m p re s s o r fro n t h e a d
electrical term inals line up the marks scribed
on the compressor.
MAJOR REPAIR TO
S ervice repair procedures to the com pressor shaft seal
and pressure relief valve or disassem bly of the internal
com pressor m echanism are considered " M a jo r" since the
refrigeration system must be purged of refrigerant before
proceeding.
If servicing or replacing the internal cylin der and shaft
assem bly, m easure and re p la ce th e oil with new 5 2 5
viscosity refrigerant oil.
D isassem ble the com pressor in a clean work area. Use
clean tools. D isassem bly procedures require proper ser­
vice tools. Using in adequ ate e q u ip m e n t m ay d a m a g e the
compressor.
R ep lacem en t parts are p ackag ed and can be used
w ithout cleaning.
Piston shoe discs and shaft thrust races are " n um ­
b e re d ." To d eterm ine size and dim ension, refer to the
chart in this section.

SHAFT SEAL REPLACEMENT

I4" *| Rem ove or D isconnect (Figures 1, 13, 14 and
15)
Tools Required:
J 5 4 0 3 S n ap Ring Pliers
J 9392-01 Shaft Seal R em over and Installer
J 9 5 5 3 Seal R em o ver
J 2 2 9 7 4 - A C o m p r e s s o r
Protector
J 2 3 1 2 8 -A C o m p r e s s o r S h a ft S e a l
Rem over and Installer
1. Clutch plate and hub assem bly(2).
a y
Clean
• T h e inside of th e co m p ressor front head
around the shaft (39). P reven t dust and
dirt from en terin g the com pressor.
2. Sleeve retainer (10).
3. Absorbent felt sleeve (11).
4. Shaft seat retaining ring (12) with J 5 4 0 3 (figure 13).
5. Shaft seat (13) (figure 14).
• E n g a g e J 23128 into the recessed portion of
th e s e a t by tu rn in g J 2 3 1 2 8 to th e
(clockwise).
• Lift the seat (13) from the com pressor with a
rotary motion.
6. S haft seal (14) (figure 15).
• P lace J 2 2 9 7 4 -A o ver th e end of th e shaft (38)
to p revent cutting th e O -ring (13).
• Insert J 9392-01
(39).
A-6 AIR CONDITIONING COMPRESSOR 1B1-7
(1 6 ) so th a t th e
S h a f t O il S e a l
S e a t
right
over the com pressor shaft
• Align the coil locator projections on th e coil
housing with the holes in the front head (16).
3. Coil and housing retainer ring (7) with J 6435.
j j j l
Clean
• R em o ve any excess adhesive.
4. Pulley and bearing assem b ly (5 and 6).
5. Clutch plate and hub assem b ly (2).
THE COMPRESSOR
12. R e ta in e r R ing
J 5403
Figure 13— Removing/Installing the Shaft Seal
Retaining Ring
• E n g a g e the tabs on the seal (14) by twisting
the J 9392-01 dow nward to the right.
• E n g a g e th e tabs and lift the seal (14) out of the
shaft (39) cavity. Hold J 2 2 9 7 4 in p la ce w hile
rem oving the seal.
7. O -ring (15) with J 9 5 5 3 -0 1 .
E
Install or C onnect (Figures 1 ,1 3 through 16)
Tools Required:
J 5 4 0 3 S n ap Ring Pliers
J 9392-01 Shaft Seal R em o ver and Installer
J 9 3 9 3 -A Seal S eat R em o ver and Installer
J 9 3 6 6 C om pressor S h aft Nut Socket
J 9 6 2 5 -A P ressure Test S et w ith
Valves
J 22974-A Shaft S eal Protector
J 23128-A C e ra m ic S eal R em o ver and Installer
F -01580
S ch ra d er