Grand Caravan V6-3.8L VIN L (2007)
Vacuum Brake Booster: Description and Operation
Description
DESCRIPTION
The power brake booster mounts on the engine compartment side of the dash panel. It is connected to the brake pedal by the input (push) rod (Figure 1).
The master cylinder is bolted to the front of the booster. A vacuum line connects the power brake booster to the intake manifold.
Figure 1 Power Brake Booster (Typical)
All Left-Hand-Drive (LHD) vehicles use a 270 mm single diaphragm vacuum power brake booster. All Right-Hand-Drive (RHD) vehicles use a 225/200
mm tandem diaphragm vacuum power brake booster.
Vehicles equipped with Disc/Disc brakes use a different power brake booster than vehicles equipped with Disc/Drum brakes. Differences between the
two are internal. Service is the same for all boosters.
The power brake booster can be identified by the tag attached to the body of the booster (Figure 2). This tag contains the production part number, the
date it was built, and who the manufacturer of the power brake booster is.
NOTE: The power brake booster assembly is not a repairable component and must be replaced as a complete assembly if found to be faulty in
any way. The check valve located on the power brake booster face is not repairable, but it can be replaced separately from the power brake
booster.
