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Posted on Jan 02, 2017
Check the reservoir to be sure the fluid is full. If not, top it off and try it again. If there's still trouble building pressure, pump the brakes a bunch of times, and then check around each wheel for fluid on the ground. If you see none, it's possible that you have a break in the line somewhere through the chassis and that the fluid is leaking out inside. If you see no evidence of leakage, and the reservoir is still full, you need a new brake master cylinder - what will have happened is that the diaphragm around the plunger inside the master cylinder (which moves through the cylinder when you push the pedal, and forces fluid out to the wheels) has a hole or tear in it, so instead of pushing the fluid out to the brakes, the plunger simply moves through the fluid. It never builds pressure, and your brakes don't work.
Posted on Dec 22, 2009
Testimonial: "thanks for the info. very helpful. harry Newman"
Since there is no loss of fluid we can rule out any leaks. A poor booster would make you apply the brake much harder to stop. So somehow you are not developing the necessary pressure for the brakes to function. The pressure is developed by the master cylinder seals. You can get a rebuild kit or a rebuilt master cylinder but the real pain is bench bleeding the new one. Luck to you.
Posted on Jul 18, 2008
SOURCE: 2005 fx f150 brake pedal
it sounds like you need to bleed the brake lines. it's a two person job, and at least one has to know how to do this. if not you'll have to take it to a brake shop. it also could be a bad brake booster, but your car isn't that old so i don't think it's that.
Posted on Nov 28, 2008
SOURCE: 94 buick brakes
There could be 2 reasons that the pedal would go to the floor.1 -there is air in the system.If no one has taken a line loose then it will be #2 -the brake master cylinder has gone bad and will need to be replaced.Ther will be directions on how to do this proporely with the replacement unit.if you need further assistance let me know.
Posted on Mar 08, 2009
First look for obvious leaks under the vehicle, especially the inside area of each wheel... If you see fluid, you have either a blown cylinder seal or a bad line (check the rubber hoses to the front and back brakes too) Repair the offending part and bleed the air out of the system... (remember to clean pads or shoes if they have fluid on them)... If you see no hint of leakage anywhere, then suspect the master cylinder... if you remove the master cylinder, check and make sure that it didn't leak fluid into the brake booster diaphragm (Brake fluid will destroy the booster)... as in any repair when you open the system (lose fluid), you will need to bleed out the air to restore function... hope this helps...;-)
Posted on May 04, 2009
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