GM Lumina/Grand Prix/Cutlass Supreme/Regal 1988-1996

Wheel Cylinder

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REMOVAL & INSTALLATION



See Figures 1 and 2

Click image to see an enlarged view

Fig. Fig. 1: The wheel cylinder is mounted to the brake backing plate



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the wheel cylinder components

  1. Raise and safely support the vehicle.
  2.  
  3. Remove the tire and wheel assembly.
  4.  
  5. Mark the relationship of the wheel to the axle flange to help maintain wheel balance after assembly.
  6.  
  7. Remove the tire and wheel assembly.
  8.  
  9. Remove the brake drum, as outlined earlier in this section.
  10.  
  11. Using tool J-38400, or an equivalent brake spanner and remover, remove the actuator spring from the adjuster lever. Use care not to distort the spring when removing it.
  12.  

During the following steps when removing the retractor spring from either shoe and lining assembly, do not over stretch the spring. This will reduce its effectiveness.


CAUTION
Keep fingers away from retractor spring to prevent fingers from being pinched between the spring and shoe web or spring and the backing plate.

  1. Remove the bleeder screw to gain access to the brake line.
  2.  
  3. Disconnect and cap or plug the wheel cylinder brake line to prevent fluid loss and/or brake system contamination.
  4.  
  5. Spread the upper half of the brake shoes and remove the wheel cylinder retaining bolts and remove the wheel cylinder.
  6.  

To install:
  1. Apply Loctite&trade Master Gasket Maker or equivalent sealer to the wheel cylinder shoulder face that contacts the backing plate.
  2.  
  3. Position the wheel cylinder assembly on the backing plate and hold into place.
  4.  
  5. Install attaching bolts and tighten to 110 inch lbs. (12 Nm).
  6.  
  7. Connect the brake line to the wheel cylinder torquing to 12 ft. lbs. (17 Nm).
  8.  
  9. Bleed the wheel cylinder using the recommended procedure.
  10.  
  11. Install the bleeder valve and tighten to 62 inch lbs. (7 Nm).
  12.  
  13. Clean all the brake spring completely with brake solvent and allow to air dry.
  14.  
  15. Install the actuator spring and adjust the brake shoes.
  16.  
  17. Install the brake drum and wheel assembly, torquing the wheel to specifications.
  18.  
  19. Add DOT 3 brake fluid to the master cylinder if needed and road test to verify proper brake system performance.
  20.  

 
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