RAM 3500 Van V8-360 5.9L VIN 5 Magnum (1998)
Vacuum Brake Booster: Description and Operation
Power assisted brakes are standard on all models. A dual diaphragm, vacuum operated power brake booster is used to provide assist.
The booster unit consists of a single housing divided into separate chambers by two internal diaphragms. The outer edge of the diaphragm is secured to
the housing.
The booster push rod, which connects the booster to the brake pedal and master cylinder, is attached to the center of the diaphragm. A check valve is
used in the booster inlet and is connected to the engine intake manifold. Power assist is generated utilizing a combination of vacuum and atmospheric
pressure to boost brake assist.
NOTE: The power brake booster is not a repairable component. The booster must be replaced as an assembly if diagnosis indicates a malfunction has
occurred.