Vacuum Brake Booster Description (Booster Assembly)

During normal operation of the tandem diaphragm unit, with the brake pedal released, manifold vacuum is applied to both sides of the diaphragms. Applying the brakes allows air at atmospheric pressure to enter one side of the diaphragms. This pressure difference provides the power assist.

The booster assembly is located on the left front dash panel. The master cylinder is mounted to the booster assembly.

The vacuum booster assembly is serviceable by replacement only.