What is the hydraulic brake booster system, anyways?

Optional items we recommend fitting when doing the hydraulic brake booster upgrade:

ACDelco 178-0685 GM Original Equipment Power Brake Booster

$564.54
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  • TAG : A: It is of Hydraulic Brake Booster Type.
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    When vacuum boosters first came out, they provided an enormous advantage for car manufacturers. if you have ever operated a vehicle with manual brakes, you know that they don’t work even close to as well as their power brake counterparts. Vacuum boosters increased the braking pressure to about 800 to 900 pounds. However, with hydraulic brake boosters, this number more than doubles, giving you up to 2,000 to 2,700 pounds, depending on the system.

  • When you steer, fluid pressure is built up in the power steering pump due to the constant circulation of the power steering fluid. This hydraulic pressure, in a hydraulic brake booster system, is then stored in an area called an “accumulator.” When you push on your brakes, the pressure is taken from the accumulator to the vehicle’s master cylinder via the hydraulic booster system, effectively stopping the car.

    Braking systems that use a hydraulic brake booster are known for being sensitive, needing only about half of the applied pedal pressure to create the same amount of brake pressure as conventional vacuum booster brakes. Because of this and other reasons, they are widely sought after for diesel engines, but they are still the minority compared to vacuum brake boosters.

  • The hydraulic brake booster unit runs off the power steering pump in line with the steering box. The vehicles steering remains unaffected. These style hydraulic units have been used in braking systems for decades in most Ford and Chevrolet heavy duty vehicles, they are well proven for reliability and performance. The line pressure in the braking system is increased when using the hydraulic unit from around 1,000 PSI up to around 2,000 PSI depending on model. As the pressure is increased we recommend at a minimum to replace your old factory rubber brake lines - we offer ADR approved stainless steel braided brake lines at a discounted price when purchased with the hydraulic brake booster kit.

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Most vehicles currently manufactured have hydraulic power assisted steering systems. The hydraulic power source for such steering systems can also be used to operate a brake booster. Thus the same power source can be used for both steering and brake systems. In combining the brake system with the steering system a first master cylinder is mounted on the firewall of the cab of the truck. This first master cylinder is connected by flexible conduits to an actuator mechanism of the hydraulic brake booster. The hydraulic brake booster being is remotely mounted on the vehicle and connected to a second master cylinder. The second master cylinder is connected to the wheel brakes of the vehicle.