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

Master Cylinder

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REMOVAL & INSTALLATION



Vehicles Without ABS

See Figures 1, 2, 3, 4 and 5



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Fig. Fig. 1: Exploded view of the master cylinder assembly-1995 vehicle without ABS shown



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Fig. Fig. 2: The master cylinder is mounted to the power booster with two retaining nuts



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Fig. Fig. 3: Detach the fluid lever sensor electrical connector



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Fig. Fig. 4: Using a suitable wrench, remove and cap the lines from the master cylinder



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Fig. Fig. 5: Unfasten the retaining nuts, then remove the master cylinder assembly

Always use a proper size flare nut wrench when removing and installing the brake lines. Failure to use the proper wrench may cause damage to the line fittings.

  1. Disconnect the negative battery cable.
  2.  
  3. Detach the electrical connector from the fluid level sensor at the master cylinder.
  4.  
  5. Using a flare nut wrench, remove and plug the brake lines from the master cylinder. Plugging the lines will prevent fluid loss and contamination.
  6.  
  7. Unfasten the two master cylinder-to-brake power booster retaining nuts and remove the master cylinder.
  8.  

To install:
  1. Install the master cylinder and secure with the retaining nuts. Tighten the retaining nuts to 20 ft. lbs. (27 Nm).
  2.  
  3. Unplug and connect the brake lines using a flare nut wrench. Tighten the brake pipes to 15 ft. lbs. (20 Nm).
  4.  
  5. Attach the fluid level sensor electrical connector.
  6.  
  7. Fill the master cylinder to the proper level with NEW brake fluid meeting DOT 3 specifications from a clean, sealed container.
  8.  
  9. Bleed the system as outlined in this section.
  10.  
  11. Connect the negative battery cable and recheck the fluid level.
  12.  

Do NOT move the vehicle until a firm brake pedal is felt.

Vehicles With ABS

For vehicles equipped with ABS, please refer to the Hydraulic Modulator/Master Cylinder removal and installation procedure, located later in this section.

 
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