GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Tools Required

    • J 33027-A Clutch Hub Holding Tool
    • J 33013-B Hub and Drive Plate Installer
    • J 41790-A Compressor Holding Fixture

    Object Number: 157218  Size: SH
  1. Remove the compressor from the vehicle. Refer to Air Conditioning Compressor Replacement .
  2. Clamp the J 41790-A in a vise and attach the compressor to the holding fixture.
  3. Hold the clutch hub and drive plate assembly (2) in place using the J 33027-A .
  4. Use a 13 mm socket (1) in order to remove the compressor shaft nut.

  5. Object Number: 157221  Size: SH
  6. Thread the clutch plate and hub remover, the installer tool hub, and the drive plate installer into the hub.
  7. Remove the hub and drive plate assembly (1) by turning the center screw into the body of the hub and drive plate installer and against the compressor shaft.
  8. Remove the shaft key (retain the shaft key for reassembly).

Installation Procedure

Tools Required

    • J 33013-B Hub and Drive Plate Installer
    • J 33027-A Clutch Hub Holding Tool
    • J 33017 Pulley and Bearing Assembly Installer

    Object Number: 157219  Size: SH
  1. Install the shaft key into the hub key groove (4) approximately 3.2 mm (1/8 in) out of the keyway.
  2. The shaft key is curved slightly in order to provide an interference fit in the hub key groove.

  3. Clean the surfaces of the clutch plate (1) and the clutch rotor (2) before installing the clutch plate and hub assembly.
  4. Align the shaft key with the shaft keyway in the clutch plate and the hub assembly and place the clutch plate (1) onto the compressor shaft (3).

  5. Object Number: 157222  Size: SH
  6. Remove the J 33013-B :
  7. 4.1. Remove the center screw from the body of the hub and drive plate installer.
    4.2. Install the center screw into the opposite end of the hub and drive plate installer.
  8. Install the J 33013-B and the bearing tools (1) onto the clutch plate (3) and the hub assembly (2):
  9. 5.1. Back off the body of the hub and drive plate installer tool enough to allow the center screw to be threaded onto the end of the compressor shaft.
    5.2. Thread the center screw several turns onto the end of the compressor shaft.

    Do not tighten the center screw on the compressor shaft.

  10. Hold the center screw with a wrench:
  11. 6.1. Tighten the hex portion of the hub and drive plate installer body several turns.
    6.2. Remove the hub and drive plate installer from the clutch plate and hub.
    6.3. Ensure that the shaft key is still in place in the keyway.
  12. Reinstall the J 33013-B .
  13. Place a feeler gage between the clutch plate and the clutch rotor.
  14. Tighten the hex portion of the hub and drive plate installer until the air gap between the clutch plate and clutch rotor is 0.40 mm (0.015 in).
  15. Ensure that the air gap is even all around the clutch plate and hub assembly.


    Object Number: 157218  Size: SH
  16. Remove the J 33013-B .
  17. Hold the clutch plate and hub assembly (2) with the J 33027-A .
  18. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  19. Install the compressor shaft nut.
  20. Tighten
    Tighten the compressor shaft nut to 18 N·m (13 lb ft).

  21. Spin the pulley rotor by hand in order to ensure that the rotor is not rubbing against the clutch drive plate.
  22. Remove the compressor from the J 41790-A .
  23. Install the compressor into the vehicle. Refer to Air Conditioning Compressor Replacement .