Important:
• Do not use lubricated compressed air on brake parts. Lubricated
compressed air may damage to the rubber parts. • If you remove or disconnect any hydraulic component, bleed all
or part of the brake system. Refer to
Hydraulic Brake System Bleeding
. • The fastener tightening values specified are for dry, unlubricated
fasteners. • Perform the service operations on a clean bench free from all
mineral oil materials.
This booster is a tandem vacuum suspended unit. In a normal operating mode, with the service brakes in the released position, the tandem vacuum suspended booster operates with vacuum on both sides of the diaphragms. When the brakes are applied, air at 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 the one side of each diaphragm. The air is then drawn from the booster through the vacuum check valve to the vacuum source.
