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Express Car Care of Denver

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Power Brakes

July 15, 2015 by Denver Express Car Care

Power BrakesDriving around in traffic can really let you know if your power brakes are doing their job. Basically, the power brake system helps you 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 we step on the brake pedal, we 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 at each wheel.

When there’s a problem, it’s usually a fluid leak somewhere along the line.  It could be at a fitting or a hose, or even an internal leak in the master cylinder.  A leak gives the pressurized fluid somewhere to go other than to the power brakes, so stopping power is damaged.  Lose enough fluid and you can’t stop at all, and we all know that’s extremely dangerous.

If you notice any decrease in stopping power or if your pedal seems mushy, you could have a problem.  There are some preventative maintenance items for the power brake system that will help them last longer.  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 caused by wear, 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 the 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 doesn’t do a very good job of providing hydraulic pressure.

A final word – 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.  Your service adviser at Express Car Care can help, just call or come in and see us.

Filed Under: Brake Service Tagged With: Power Brakes

Express Car Care
4200 E. Evans Ave. Denver, CO (map)
Phone: (303) 691-2760
Located just southeast of the Colorado Light Rail station

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Monday: 8:00AM – 5:00PM
Tuesday: 8:00AM – 5:o0PM
Wednesday: 8:00AM – 5:00PM
Thursday: 8:00AM – 5:00PM
Friday: 8:00AM – 5:00PM
Saturday: Closed – A note from the owner
Sunday: Closed

Last car oil change time  – 5:00PM

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