Ford Vacuum Brake Booster Cutaway Diagram - Reaction Disc & Push Rod (Bronco)

This document is a cutaway (cross-section) technical illustration of a vacuum brake booster assembly, showing the internal arrangement of its major components. Callout labels identify the front seal at the master cylinder side of the booster, the vacuum booster itself (labeled with base part reference 2005), the valve plunger inside the booster's control valve housing, the valve operating rod that extends rearward toward the brake pedal, the master cylinder push rod extending forward from the booster, and the rubber reaction disc shown in its installed position between the plunger and push rod. The diagram illustrates how the pedal input side (valve operating rod and plunger) connects through the rubber reaction disc to the output push rod that actuates the master cylinder, with the booster diaphragm return spring visible in section. The figure carries the Ford illustration reference number H2511-C. A reader can learn the relative positions of the booster's internal parts, which is useful when adjusting the master cylinder push rod, replacing the front seal, or verifying that the rubber reaction disc is correctly seated during booster service or overhaul. The document itself contains no year, model, or engine applicability statements; it was filed by the uploader with a 1992 Ford Bronco.