GM Service Manual Online
For 1990-2009 cars only

Disassembly Procedure

Tools Required

    • J 1859-A Steering Wheel Puller
    • J 28509-A Bearing Remover

    Object Number: 228725  Size: SH
  1. Use the J 1859-A in order to remove the impeller.

  2. Object Number: 228727  Size: SH
  3. Use the J 1859-A in order to remove the pulley.

  4. Object Number: 228730  Size: SH
  5. Remove the dust thrower (2).

  6. Object Number: 228723  Size: SH
  7. Use snap ring pliers in order to remove the snap ring.

  8. Object Number: 228708  Size: SH
  9. Remove the spindle. Use a plastic hammer in order to lightly tap the spindle free.
  10. Remove the bearing.
  11. Remove the spacer.

  12. Object Number: 228730  Size: SH
  13. Remove the front seal (8).
  14. Use an arbor press and the J 28509-A in order to remove the seal unit (7).
  15. Use an arbor press in order to remove the following components from the spindle (5):
  16. • The bearings
    • The spacer (4)
  17. Inspect the above components for wear or damage.
  18. Replace or repair the above components as necessary.
  19. Inspect for proper fit of the shaft to the pulley center.
  20. Inspect for proper fit of the impeller (6) and the pulley center to the pulley (1).
  21. Inspect the housing for cracks or burrs.
  22. Inspect the shaft for the following conditions:
  23. • Cracks
    • Burrs
    • Pitting
    • Replace the shaft as necessary.

Assembly Procedure


    Object Number: 228705  Size: SH
  1. Install the following components onto the spindle (5).
  2. • The bearings
    • The spacer (4)

    Object Number: 228730  Size: SH
  3. Use an arbor press in order to install the following components onto the housing:
  4. • The spindle (5)
    • The bearings and spacer (4)
  5. Apply multipurpose type grease to the lip seal.
  6. Apply engine oil to the outer circumference of the lip seal.
  7. Position the seal so that the lip of the seal faces forward.
  8. Install the front seal (8).
  9. Use snap ring pliers in order to install the snap ring (3).
  10. Install the dust thrower (2).

  11. Object Number: 228720  Size: SH
  12. Use a bench press in order to install the pulley.

  13. Object Number: 228716  Size: SH

    Caution: To protect the bearings and housing during this procedure, the press must contact the impeller side of the pump shaft and the pulley.

  14. Apply a thin coat of liquid gasket (Three Bond 1104 or equivalent) to the seal.

  15. Object Number: 228718  Size: SH
  16. Use a bench press and an installer in order to install the seal unit to the housing.

  17. Object Number: 228688  Size: SH
  18. Ensure that the seal height is between 11.0-11.6 mm (0.433-0.457 in).

  19. Object Number: 228712  Size: SH

    Caution: To protect the bearings and housing during this procedure, the press must contact the impeller and the pulley.

  20. Use a bench press in order to install the impeller to the shaft until the impeller bottoms out against the shaft.