BENDIX Single Diaphragm Booster

This unit uses engine manifold vacuum and atmospheric pressure to assist braking. The vacuum power chamber consists of a front and rear shell, diaphragm, diaphragm plate, push rod, and vacuum diaphragm return spring.

A mechanically actuated power brake unit check valve, integral with the vacuum power diaphragm, controls the degree of brake application and release in accordance with foot pressure applied to check valve operating rod through brake pedal linkage.