Vacuum Vent Valve: Adjustments

1. Firmly depress brake pedal and hold.
2. Push dump valve in until valve collar bottoms against retaining clip.

Vacuum Dump Valve Adjustment.:

3. Place a 0.05-0.10 inch shim between white button on valve and pad on brake pedal.
4. Firmly pull brake pedal rearward to its normal position, then allow dump valve to move into position in retaining clip.