Q:

What is a parking brake diagram used for?

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Quick Answer

A parking brake diagram is useful when attempting to install, remove or diagnose a problem with the parking brake, also known as the emergency brake. An effective diagram provides a clear illustration of all components of the parking brake system.

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Full Answer

Parking brake designs vary by make and automobile model but usually fall under one of four basic activation mechanisms: stick lever, center lever, pedal, and electric or push-button. Each of these mechanism types consists of the control, linkage and application areas. The system is designed to act as a fail-safe braking activator in the event of a service brake failure.

A parking brake diagram of the control area details the activation mechanism inside the vehicle. Successful engagement transmits a mechanical signal via a parking brake cable to a linkage component in the engine compartment. This signal, in turn, applies the brakes independently of the hydraulic service brakes to either the front or rear wheels, depending on the particular automobile design.

The most common repair to a parking brake system is replacement of the cable that connects the control mechanism to the linkage. As the cable ages, it becomes stretched to the point that it no long engages the brakes effectively.

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