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Vacuum Pump Valve

  1. Dump valve should be adjusted so that there is no vacuum leak when brake pedal is not depressed, and a vacuum leak when pedal is depressed. Check with vacuum pump.
  2. If adjustment is required, hold brake pedal in depressed position and push valve into valve collar as far as it will go. Place a 0.050" shim between the White valve button and the pad (adapter on some models) on the brake pedal.
  3. Pull brake pedal fully rearward and remove shim. Valve button should now be slightly above or just touching the pad (adapter) on the brake pedal.
    Fig 1: Vacuum Dump Valve. Valve Housing Must Clear Pad (Adapter) On Brake Pedal When Pedal Is Held In Full Rearward Position
    G09358697Courtesy of FORD MOTOR CO.
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