GM Service Manual Online
For 1990-2009 cars only

Generator Overhaul A-Type : Mando

Disassembly Procedure


    Object Number: 1224251  Size: SH
  1. Remove the generator. Refer to Generator Replacement .
  2. Remove the front bracket and rear bracket.
  3. Remove the through-bolts (1).

  4. Object Number: 1224269  Size: SH
  5. Pry front bracket downwards using a screwdriver (1).
  6. Separate the front bracket and rear bracket (2).

  7. Object Number: 1222997  Size: SH
  8. Cover the rotor assembly with the cloth (4).
  9. Place the pulley upward and vice the rotor (3).
  10. Remove the pulley nut (2).
  11. Remove the pulley (1).

  12. Object Number: 1222998  Size: SH
  13. Remove the large collar (1).
  14. Remove the rotor from the front bracket (3).
  15. Remove the small collar from the rotor shaft (2).

  16. Object Number: 1222999  Size: SH
  17. Remove the support plate screws (1).
  18. Remove the plate (3).
  19. Remove the front bearing using the press (2).

  20. Object Number: 1223003  Size: SH
  21. Remove the battery positive terminal nut (1) from the rear bracket.
  22. Remove the washer (2).

  23. Object Number: 1223004  Size: SH
  24. Remove the rectifier screw (3).
  25. Remove the brush holder and regulator assembly screws (1).
  26. Remove the stator assembly from the rear bracket with the rectifier/brush holder/regulator (2).

  27. Object Number: 1223006  Size: SH
  28. Remove the rectifier/brush holder/regulator connections (2).
  29. Notice: If the stator connections are welded in, use just enough heat to melt the lead. Avoid using to much heat as it can damage the diodes.

  30. Remove the stator and rectifier connections (1).

Assembly Procedure


    Object Number: 1223063  Size: SH
  1. Assemble the stator assembly into the rear bracket and rotor assembly (1).
  2. • Brushes (2)
    • Hole (3)

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1223065  Size: SH
  3. Install the brush holder/regulator/rectifier screws (1).
  4. Tighten
    Tighten the brush holder/regulator/rectifier screws to 9-12 N·m (80-106 lb in).

  5. Install the battery positive terminal nut (2).
  6. Tighten
    Tighten the battery positive terminal nut to 4-7 N·m (35-62 lb in).


    Object Number: 1223066  Size: SH
  7. Install the front bearing spot plate screws (1).
  8. Tighten
    Tighten the front bearing spot plate screws to 6-8 N·m (53-71 lb in).


    Object Number: 1223067  Size: SH
  9. Install the generator pulley nut (1).
  10. Tighten
    Tighten the generator pulley nut to 80-110 N·m (59-81 lb ft).

  11. Install the through-bolts (2).
  12. Tighten
    Tighten the through-bolts to 4-6 N·m (35-53 lb in).

Generator Overhaul B-Type : DAC

Disassembly Procedure


    Object Number: 1223068  Size: SH
  1. Remove the generator. Refer to Generator Replacement .
  2. Remove the battery positive terminal nut (2).
  3. Remove the cover (3) and cover latch (1).

  4. Object Number: 1223069  Size: SH
  5. Remove the stator coil lead and rectifier diode lead connections (1).

  6. Object Number: 1223070  Size: SH
  7. Remove the rectifier bolts (1).
  8. Remove the rectifier/regulator screw (2).
  9. Remove the brush holder/regulator screw (3).
  10. Remove the regulator screw (4).
  11. Remove the regulator/brush holder/rectifier assembly (5).

  12. Object Number: 1223071  Size: SH
  13. Remove the rectifier and regulator connection (2).
  14. Remove the regulator and brush holder connection (1).
  15. Visibly inspect the rectifier (3)/regulator (4)/brush holder (5) for damage or if broken.

  16. Object Number: 1223072  Size: SH
  17. Remove the shield (3).
  18. Remove the through-bolts (1).
  19. Remove the frame from the drive end bracket (2).

  20. Object Number: 1223073  Size: SH
  21. Cover the rotor with the cloth (4).
  22. Place the pulley upwards and vice the rotor (3).
  23. Remove the pulley nut (2).
  24. Remove the pulley (1).
  25. Remove the pulley and rotor assembly from the drive end bracket.

  26. Object Number: 1223074  Size: SH
  27. Remove the collar (4).
  28. Remove the rotor from the driver end bracket (2).
  29. Remove the collar from the rotor shaft (3).
  30. Inspect the front bearing for corrosion, wear, noise, and other damage (1).
  31. Remove the drive end bracket, rotor, and space.

  32. Object Number: 1223075  Size: SH
  33. Remove the remains (1) after the welding.
  34. Remove the stator assembly (2) from the frame.

Assembly Procedure


    Object Number: 1223075  Size: SH
  1. Install the stator assembly (2) to the frame.

  2. Object Number: 1223074  Size: SH
  3. Install the space, rotor and drive end bracket.
  4. Install the collar to the rotor shaft (3).
  5. Install the rotor to the driver end bracket (2).
  6. Install the collar (4).

  7. Object Number: 1223073  Size: SH
  8. Install the pulley and rotor assembly to the drive end bracket.
  9. Notice: Refer to Fastener Notice in the Preface section.

  10. Install the pulley (1) and pulley nut (2).
  11. Tighten
    Tighten the pulley nut to 80-110 N·m (59-81 lb ft).


    Object Number: 1223072  Size: SH
  12. Install the frame to the driver end bracket (2).
  13. Install and tighten the through bolts (1).
  14. Install the shield (3).

  15. Object Number: 1223071  Size: SH
  16. Install the regulator and brush holder connection (2).
  17. Install the rectifier (3) and regulator connection (2).

  18. Object Number: 1223070  Size: SH
  19. Install the regulator/brush holder/rectifier assembly (5).
  20. Install and tighten the regulator screw (4).
  21. Tighten
    Tighten the regulator screw to 9-12 N·m (80-108 lb in).

  22. Install and tighten the brush holder/regulator screw (3).
  23. Tighten
    Tighten the brush holder/regulator screw to 9-12 N·m (80-108 lb in).

  24. Install and tighten the rectifier/regulator screw (2).
  25. Tighten
    Tighten the rectifier/regulator screw to 9-12 N·m (80-108 lb in).

  26. Install and tighten the rectifier bolts (1).
  27. Tighten
    Tighten the rectifier bolts to 9-12 N·m (80-108 lb in).


    Object Number: 1223069  Size: SH
  28. Install the stator coil lead and rectifier diode lead connections (1).

  29. Object Number: 1223068  Size: SH
  30. Install the cover (3) and cover latch (1).
  31. Install and tighten the battery positive terminal nut (2).
  32. Install the generator. Refer to Generator Replacement .