Vacuum Brake Booster Description

Important:
^ Do not use lubricated compressed air on the brake parts. Damage to the rubber parts may result.
^ Bleed all or part of the brake system if any hydraulic component is removed or disconnected. The torque values specified are for dry non-lubricated fasteners.
^ Perform service operations on a clean bench, free from all mineral oil materials.

The booster (9) for this vehicle is a tandem suspended unit. In a normal operating mode, with the service brakes in the released position, the tandem vacuum suspended booster operates with a vacuum on both sides of the diaphragms. When the brakes are applied, air at the atmospheric pressure is admitted to one side of each diaphragm in order to provide the power assist. When the service brake is released, the atmospheric air is shut off from one side of each of the diaphragm. Air is then drawn from the booster through the vacuum check valve to the vacuum source.