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Older cars had integral brakes, meaning that a proportional valve, which is the redundant part of a brake system that prevents total failure of brakes, if a brake line broke you will still have brakes on two wheels, and a master cylinder were all combined in one unit. A nonintegral brake unit typically uses a vacuum booster for power assist. The booster, the master cylinder, hydraulic modulator, and proportional valve are all separate units

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11y ago

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Its a parking brake.

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12y ago
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Q: What is an integral braking system?
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