Hombre S Regular Cab 4WD V6-4.3L (1999)
Vacuum Brake Booster: Description and Operation
Vacuum Brake Booster Description
Booster Assembly
During normal operation of the tandem diaphragm unit, with the brake pedal released, manifold vacuum is applied to both sides of the diaphragms.
Applying the brakes allows air at atmospheric pressure to enter one side of the diaphragms. This pressure difference provides the power assist.
The booster assembly is located on the left front dash panel. The master cylinder is mounted to the booster assembly.
The vacuum booster assembly is serviceable by replacement only.
Valve, Hoses, and Routing
Vacuum is supplied to the brake vacuum booster by a pipe on the engine intake manifold. A flexible hose connects the pipe and the vacuum booster
check valve. The check valve is mounted in a grommet on the front of the brake vacuum booster.
