Prizm L4-108 1.8L DOHC VIN 8 MFI (1998)
Vacuum Brake Booster: Description and Operation
Vacuum Brake Booster Operation
IMPORTANT:
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Do not use lubricated compressed air on brake parts. Lubricated compressed air may damage to the rubber parts.
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If you remove or disconnect any hydraulic component, bleed all or part of the brake system. Refer to Hydraulic Brake System Bleeding.
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The fastener tightening values specified are for dry, unlubricated fasteners.
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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.
