GMC 1989 Light Duty Truck, Repair Manual, Page: 85 / 998

HR-6 AIR CONDITIONING COMPRESSOR 1B4-9
Figure 21 — Compressor Shaft Seal
SHAFT SEAL REPLACEMENT
Remove or Disconnect (Figures 4, 22, 23 and 24)
Tools Required:
J 5403 Snap Ring Pliers
J 34614 Shaft Seal Protector
J 23128-A Seal Remover and Installer
J 9553-01 O-Ring Seal Remover
1. Clutch plate and hub assem bly (2).
• Install J 34614 over the threaded end of the
shaft (20).
2. Shaft seal retainer ring (8) using J 5403 (figure 22).
• Clean the com pressor neck area around the
shaft (20), the exposed part of the shaft seal (9)
and the O-ring seal groove.
3. Shaft lip seal (9) using J 23128-A (figure 23).
• Insert J 23128-A into the shaft lip seal, tighten
and remove lip seal.
4. O-ring seal (10) using J 9553-01 (figure 24).
I
«
Inspect
Make sure the com pressor neck area is clean.
All parts. Replace as necessary.
Install or Connect (Figures 4 and 25)
Tools Required:
J 33011 O-Ring Seal Installer
J 23128-A Seal Seat Remover and Installer
J 34614 Shaft Seal Protector
J 5403 Snap Ring Pliers
• Dip the new O-ring seal in clean 525 viscosity refriger­
ant oil.
• J 34614 onto the shaft (20).
1. O-ring seal using J 33011 (figure 25).
• Insert J 33011 into the com pressor neck until
the installer “ bottom s.”
• Lower the movable slide of J 33011, releasing
the O-ring seal into the lower groove.
• Rotate J 33011 to seat the O-ring seal and
remove J 33011.
2. Shaft lip seal using J 23128-A (figure 23).
• Dip the shaft lip seal in clean 525 viscosity refrigerant
oil and install shaft lip seal on J 23128-A.
• Bottom the shaft lip seal into the com pressor neck
area using J 23128-A.
Figure 22 — Removing or Installing the Shaft
Lip Seal Retaining Ring
• Release and remove J 23128-A.
3. Shaft seal retainer ring using J 5403 (figure 22).
• Install flat side of shaft seal retainer ring against
the lip seal.
• Remove J 34614.
9
Important
Leak test the compressor.
Refer to “ Leak T esting” .
Clean
• Shaft (20) and inside the com pressor neck area.
4. Clutch plate and hub assem bly (2).
HIGH PRESSURE RELIEF
VALVE REPLACEMENT
Remove or Disconnect (Figures 4 and 26)
• Be sure the com pressor has no charge.
1. High pressure relief valve (32).
2. O-ring seal (33).
Install or Connect (Figures 4 and 26)
• Lubricate the threads of the high pressure relief valve
(32) and new seal with 525 viscosity refrigerant oil.
1. High pressure relief valve (32) with new seal.
$ Tighten
High pressure relief valve (32) to 9 N m (84 in.
lbs.).
Important
Leak test the compressor.
Refer to “ Leak T esting.”