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There are three kinds of automotive braking systems. The MANUAL system consists of a pedal that directly creates hydraulic pressure in the master cylinder with no boost. This type of system is relatively scarce and hasn't been used on newer vehicles in decades. Next is the VACUUM BOOSTED system. This system uses engine vacuum applied to a large diaphragm to ease the force of the pedal, making braking much easier and safer. The third type is a HYDRAULIC BOOSTED system. This system uses pressure from the vehicle's power steering system in an assembly that is quite similar to the hydraulic boost but is much stronger. These systems are usually found on larger vans and trucks, and heavy duty vehicles.

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