Brakes sometimes go the whole way to the floor


Old 07-09-04, 05:37 PM
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Brakes sometimes go the whole way to the floor

About a month ago my daughter had new rotors and brakes put on her 98 Ford Pick-up. The past few days, every now and then, the brakes go the whole way to the floor--pretty scary. What could be the problem?
Thank You!!
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Old 07-13-04, 08:36 PM
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Hello: mamawolfv

One of the several possible causes could simply be a small amount of air in the brake fluid lines. Air can be compressed but fluid cannot. Thus even a small amount of air in any brake fluid line will cause the problem.

Return the vehicle to the place that did the brakes and request they rebleed the brake lines and top off the master brake fluid reservoir.

Another possibility is a leaky master cyclinder. Fluid bypassing the interal pistons inside the master cyclinder. Thus a decrease in fliud pressure requiring harder foot pressure on the brake pedal. Have the brake shop or mechanic check this also.

Yet another possible cause could be a leaking brake cyclinder on the rear wheels or a disc brake cyclinder on the front wheels. Or the power booster may be going bad. Have the brake shop check them also. And do so asap.

Regards & Good Luck
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