Power Brake Units - BENDIX Single Diaphragm: Description

NOTE: For other units used, see Power Brake Unit Index.

CHANGES, CAUTIONS, CORRECTIONS

FORD MOTOR CO. "CLUNK" NOISE: A "clunk" noise may be experienced upon brake application (due to clearance between power unit push rod and master cylinder piston). Separate master cylinder from power unit and adjust push rod screw outward 1/2 turn. Reassemble master cylinder to power unit. Ensure master cylinder compensation port has not been blocked: With engine running, quick brake application should produce fluid motion in front reservoir. If no motion is observed, adjust push rod screw inward 1/4 turn.

Vacuum suspended, self-contained, vacuum-hydraulic unit which utilizes engine manifold vacuum and atmospheric pressure to provide its power. Vacuum power unit contains power piston assembly, which houses control valve, reaction mechanism, and return spring. Control valve consists of air valve, floating control valve assembly, and push rod. Reaction mechanism consists of reaction plate and levers. A vacuum check valve is mounted in front housing for connection to vacuum source.