Repair Pontiac Mid-size 1974-1983 Repair Guide

Combination Valve

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Fig. Fig. 1 Cross-sectional view of a Bendix combination valve

The combination valve used on the mid-size Pontiacs is a three-function valve. It serves as a metering valve, balance valve, and brake warning switch. There are two different valves, one manufactured by Bendix and one manufactured by Kelsey-Hayes. Both valves serve the same function and differ only in minor details. In any case, all combination valves are non-adjustable and must be replaced if they are found to be defective.

REMOVAL & INSTALLATION





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Fig. Fig. 2 Typical combination valve mounting

  1. Disconnect all the brake lines at the valve. Plug the lines to prevent contamination and loss of fluid.
  2.  
  3. Disconnect the warning switch wiring connector from the valve switch terminal.
  4.  
  5. Remove the attaching bolts and remove the valve.
  6.  
  7. Install the valve in the reverse order of removal.
  8.  
  9. Bleed the entire brake system after valve installation.
  10.  

 
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