Posts Tagged: vacuum brake booster
How a vacuum brake booster works and how it fails
A vacuum brake booster is what gives you power brakes 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 … Read More
Troubleshooting the Hissing Sound When Pressing Brake Pedal
What causes a hissing sound when pressing the brake pedal? If you notice a hissing sound when pressing the brake pedal, and the sound comes from under the dash, the problem is usually a failing vacuum booster. The vacuum booster uses engine vacuum to increase braking power. The booster uses a rubber diaphragm and a push rod. The rod is connected on one side to your brake pedal and the other side pushes the master cylinder piston. How a vacuum brake booster works The vacuum brake booster consists of two … Read More