GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 33022 6-Point 13 mm Socket
    • J 33027-A Clutch Hub Holding Tool
    • J 33013-B Hub And Drive Plate Remover And Installer
    • J 34992 Compressor Holding Fixture

Removal Procedure

  1. Remove the compressor. Refer to Air Conditioning Compressor Replacement .

  2. Object Number: 237075  Size: SH
  3. Clamp the J 34992 in a vise.
  4. Attach the A/C compressor to the holding fixture using the thumb screws.
  5. Use the J 33027-A in order to prevent the clutch hub and drive plate assembly from turning.
  6. Use the J 33022 in order to remove the shaft nut.

  7. Object Number: 237077  Size: SH
  8. Thread the J 33013-B into the hub.
  9. Use a wrench in order to hold the body of the J 33013-B .
  10. Turn the center screw into the body of the J 33013-B in order to remove the clutch plate and hub assembly.
  11. Remove the shaft key. Retain the shaft key for reassembly.

Installation Procedure

  1. Install the compressor into the J 34992 .

  2. Object Number: 237078  Size: SH
  3. Install the shaft key (4) into the key groove of the clutch plate and hub (1).
  4. • Allow the key to project 3.2 mm (0.126 in) out of the key groove.
    • The shaft key is curved slightly in order to provide an interference fit in the key groove of the hub.
  5. Clean the frictional surfaces of the clutch plate and hub and the clutch pulley rotor (2).
  6. Align the shaft key with the shaft keyway (3).
  7. Notice: Do not drive or pound on the clutch hub or the shaft. Internal damage to the compressor may result.

  8. Place the clutch plate and hub assembly onto the compressor shaft.

  9. Object Number: 237079  Size: SH
  10. Remove the center screw from the J 33013-B .
  11. Reverse the body direction of the center screw of the J 33013-B .
  12. Install the J 33013-B with the bearing.
  13. Back off the body of the J 33013-B in order to allow the center screw to be threaded onto the end of the compressor shaft.
  14. Hold the center screw of the J 33013-B with a wrench.
  15. Notice: If the center screw is threaded fully onto the end of the compressor shaft, or if the body of the installer is held and the center screw is rotated, the key will wedge and will break the clutch hub.

  16. Tighten the hex portion of the body of the J 33013-B in order to press the hub onto the shaft.
  17. Tighten the body of the J 33013-B several turns.
  18. Remove the J 33013-B .
  19. Verify that the shaft key remains in the keyway before installing the clutch plate and hub assembly to the final position.
  20. Ensure that the gap between the frictional surfaces of the clutch plate and the clutch rotor is within 0.40-0.50 mm (0.016-0.020 in).
  21. Remove the J 33013-B .
  22. Verify that the shaft key is even with or slightly above the clutch hub.
  23. Install the shaft nut.
  24. Hold the clutch plate and hub assembly with the J 33027-A .
  25. 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.

  26. Tighten the shaft nut against the crankshaft shoulder, using a 17.5 N·m (12.5 lb ft) torque wrench and the J 33022 .
  27. Tighten
    Tighten the nut to 16.5 N·m (12 lb ft).

  28. Spin the pulley rotor by hand in order to verify that the rotor does not rub the clutch drive plate.
  29. Install the compressor into the vehicle. Refer to Air Conditioning Compressor Replacement .