Vacuum Brake Booster: Description and Operation

DESCRIPTION - The diaphragm-type power brake booster:
^ is self-contained.
^ is mounted on the engine side of the dash panel.
^ uses engine intake manifold vacuum and atmospheric pressure for its power.
^ utilizes a power brake booster check valve to provide temporary power assist when the vacuum source is reduced.

SERVICING
^ The hose is serviced as an assembly with the check valve.
^ The power brake booster check valve and grommet are serviced separately.
^ The power brake booster is serviced only as an assembly and must be replaced with a new unit if it becomes damaged or inoperative.