Vacuum Brake Booster: Description and Operation
POWER BRAKE BOOSTERThe power brake booster is a tandem vacuum suspended unit. In a normal operating mode, with the brakes in the released position, the tandem vacuum suspended booster operates with vacuum on both sides of its diaphragms. When the brakes are applied, air at atmospheric pressure is admitted to one side of each diaphragm. The air is then drawn from the booster through the vacuum check valve to the vacuum source. Internal components of this booster are not serviceable. The housing must not be unstaked and separated. Separating the housing will cause permanent deformation, preventing the booster from holding proper volume.