Somersworth Auto Repair

Somersworth Brake Fluid Flush

Basically, the power brake system helps provide braking power so that you don't have to do all the work with your brake pedal.  The brakes themselves are applied at the wheel using hydraulic pressure.  When you step on the brake pedal, you create pressure in the power booster that's multiplied by vacuum from the engine.   The resulting pressure pushes brake fluid through the master cylinder into tubes and hoses that run to the brake components at each wheel.  Obviously, you'd want to make sure your brake fluid is filled to the recommended level.  Low fluid in the master cylinder could indicate a leak or worn brake material.  Master cylinder leaks are usually just because it's worn out but, leaks in the brake lines and connectors can be minimized by replacing the brake fluid from time to time.  Brake fluid has additives that protect against corrosion that can damage brake components.  Brake fluid also attracts moisture which can lead to rust, not a good thing for expensive anti-lock brake components.  Also, significant amounts of water in the brake fluid can affect stopping power because water has a much lower boiling point than brake fluid.  In the high temperature environment of the brake system, the water can vaporize, and steam does not do a very good job of providing hydraulic pressure.  Make sure you use the recommended type of brake fluid.  There are several kinds and using the wrong one can lead to total brake failure.

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