GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

Filling and Bleeding the System

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SYSTEM FILLING



Do not allow the pump to run more than 60 seconds at 1 time. If the pump must run longer, allow the pump to cool several minutes between 60 second runs.

With the ignition OFF and the negative battery cable disconnected, discharge the pressure within the accumulator. Remove the cap from the reservoir, then fill the reservoir to the correct level with DOT 3 fluid.

Use only DOT 3 brake fluid from a clean, sealed container. The use of DOT 5 silicone fluid is not recommended. Internal damage to the pump components may result.

SYSTEM BLEEDING



Front brake circuits should be bled using pressure bleeding equipment. The pressure bleeder must be of the diaphragm type and must have a rubber diaphragm between the air supply and brake fluid.


CAUTION
Do not move vehicle until a firm brake pedal is achieved. Failure to obtain firm brake pedal may result in personal injury and/or property damage

Front Brake Circuit
  1. With the ignition switch OFF , disconnect the negative battery cable.
  2.  
  3. Depressurize the accumulator.
  4.  
  5. Remove the reservoir cap or disconnect the wiring sensor from the fluid level sensor and remove the sensor.
  6.  
  7. Install the special tool No. J-35798 in place of the cap or sensor.
  8.  
  9. Attach the brake bleeder to the adapter tool No. J-35798 and charge to 20 psi (138 kPa).
  10.  
  11. Attach a bleeder hose to one front bleeder valve and submerge the other end in a container of clean brake fluid.
  12.  
  13. Open the bleeder valve.
  14.  
  15. Allow the fluid to flow from the bleeder until no air bubbles are seen in the brake fluid.
  16.  
  17. Close the bleeder valve.
  18.  
  19. Repeat the previous steps on the other front bleeder valve.
  20.  
  21. Check the fluid level and fill as necessary.
  22.  
  23. Remove the brake bleeding equipment and adapters. Install the cap or sensor.
  24.  

Rear Brake Circuit
  1. Turn the ignition switch OFF .
  2.  
  3. Depressurize the accumulator.
  4.  
  5. Check the fluid level in the reservoir and fill as necessary.
  6.  
  7. Turn the ignition switch ON and allow the system to charge. (Listen for the pump motor, it will stop when the system is charged.)
  8.  
  9. Raise and safely support the vehicle.
  10.  
  11. Attach a clear bleeder hose to one of the rear bleeder valves and submerge the other end in a container of clean brake fluid.
  12.  
  13. Open the bleeder valve.
  14.  

Do not allow the pump to run more than 60 seconds at a time. If it must run longer, allow it to cool down for several minuets between the 60 second runs.

  1. With the ignition ON , slightly depress the brake pedal for at least 10 seconds.
  2.  
  3. Allow the fluid to flow from the bleeder until no air bubbles are seen in the brake fluid. Repeat the step as necessary.
  4.  
  5. Close the bleeder valve.
  6.  
  7. Repeat the procedure for the other side.
  8.  
  9. Lower the vehicle.
  10.  
  11. Fill the reservoir with clean fluid and check the pedal for sponginess. Repeat the entire bleeding procedure to correct a sponginess condition. Check the warning lamps for any indication of a low fluid level.
  12.  

 
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