RAM 1500 Truck 4WD V8-5.9L VIN Z (2002)
Vacuum Brake Booster: Description and Operation
POWER BRAKE BOOSTER
DESCRIPTION
All models use a tandem diaphragm, power brake booster.
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.
OPERATION
The booster unit consists of a single housing divided into two by a tandem diaphragm. 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 outlet connected to the engine intake manifold. Power assist is generated by utilizing a combination of vacuum and atmospheric pressure
to boost brake assist.
