How a vacuum brake booster works The most common way to provide power braking is with a vacuum brake booster. The brake booster mounts on the firewall of the vehicle and is connected to the brake pedal with a rod inside the cabin. The master cylinder is mounted on the opposite side of the brake booster, inside the engine compartment. Vacuum brake booster components In the image below you’ll see the following components and what each does: • Rubber diaphragm — the rubber diaphragm is sucked toward the master cylinder … Read More
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