Windstar V6-232 3.8L (1995)
Vacuum Brake Booster: Adjustments
Brake Booster To Master Cylinder Push Rod
BRAKE BOOSTER TO MASTER CYLINDER PUSH ROD
The push rod has an adjustment screw to maintain the correct relationship between the master cylinder push rod and the master cylinder piston. If
the push rod is too long it will prevent the master cylinder piston from completely releasing hydraulic pressure, causing the brakes to drag. If the
push rod is too short it will cause excessive pedal travel and an undesirable clunk in the booster area. Remove the brake master cylinder for access
to the booster push rod.
To check the adjustment of the adjustment screw, fabricate a gauge using the dimensions shown in the following illustration, and place it against
the master cylinder mounting surface of the booster body as shown below. The engine must be running, with the intake manifold vacuum hose
connected to the power brake booster, while checking the adjustment. Adjust the push rod screw by turning the adjustment screw in until the end
just touches the inner edge of the slot in the gauge.
