Assembly Of The Clutch And Shaft Seal - GMC 1990 Light Truck Repair Manual

1B5-4 SD-709 AIR CONDITIONING COMPRESSOR
J 29886
J 37795
Figure 8—Removing the Bearing
• Turn the puller center bolt to the right with a
socket wrench until the rotor pulley is free (fig­
ure 7).
6. Rotor bearing.
• Remove the snap ring from the rotor.
• Place the rotor in a vise.
• Install J 37795 and J 29886.
• Tap the bearing (6) out (figure 8).
7. Field coil (10).
• Loosen the coil lead wire from the clip on top of
the compressor front housing.
• Remove the snap ring (7) (figure 9).
• Remove the coil.
SHAFT SEAL
Always replace the shaft seal assembly if it is disassem­
bled. Never reuse any of the old parts.
To service the shaft seal without disassembling the
clutch, perform steps 1 and 2 under " Clutch" and then
proceed as follows.
Remove or Disconnect (Figures 2 and 10 through
4~f
12)
Tools Required:
J 9553-01 O-Ring Hook
J 37793 Seal Seat Remover/Installer
J 37794 Shaft Seal Remover and Installer
Clutch shims (3) using J 9553-01 and a small screw­
1.
driver.
2. Felt ring metal retainer (25).
• Insert the points of a snap ring pliers into the
holes in the retainer and lift out (figure 10).
Shaft seal seat snap ring.
3.
Shaft seal seat (23) with J 37793 (figure 11).
5. Seal assembly.
• Press J 37794 against the seal spring and twist
the tool until it engages the slots of the seal
cage (figure 12).
F-06174
Figure 9—Removing the Coil Snap Ring
SHAFT SEAL
-► 4- Install or Connect (Figures 2,11 and 13)
Tools Required:
J 29640 Shaft Protector
J 37794 Shaft Seal Remover and Installer
J 37793 Seal Seat Remover/Installer
Clean
Seal cavity thoroughly.
a. Use R-12 refrigerant. Blow dry.
b. Wipe with a lint free cloth and clean refrigerant
oil. Blow dry.
J 29640 over the compressor shaft.
• Do not touch the new seal lapping surfaces. Dip
the mating surfaces in clean refrigerant oil.
Slots of J 37794 to the new seal cage (21).
Seal assembly into place in the compressor seal cav­
ity (figure 13).
• Twist J 37794 to disengage it from the cage.
Clean refrigerant oil to the shaft seal seat.
Shaft seal seat (23) with J 37793 (figure 11).
Snap ring with the flat side toward the compressor.
Clutch spacer shims (3).
Use the originals if possible to give the same gap.
New felt ring.
• If the clutch was not disassembled, reinstall the
clutch front plate.
CLUTCH
-► 4- Install or Connect (Figures 2 ,3 ,1 4 and 15)
Tools Required:
J 37795 Bearing Remover and Installer/Pulley
Installer
ASSEMBLY OF THE
CLUTCH AND
SHAFT SEAL