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> Brake Problem! Brake Pedal Presses Down To Floor!
 
SAPierce2006
post Nov 23 2007, 01:57 PM
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Basically the problem that I've been having that has been progressively getting worse, is that I have to press my breaks down WAY to far to get a response out of them (nearly all the way to the floor). I'm not sure what I should do to fix this. I've replaced the master cylinder and I just got done bleeding the brakes. Neither of which really helped.

One thing that I did notice while bleeding the brakes was that my drivers side front break, when I pressed it down to bleed it, just kind of drippled out break fluid. The other side shot it to the back of the cup I was collecting in. Is this a common problem with volvos? I've owned a volvo for most of my life, as has my father and I've never really experienced anything like this. Any ideas would be great. Thanks!

Also, I'm driving a 1993 Volvo 940
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TheGreekMason
post Nov 23 2007, 10:59 PM
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You've got air in the system. Most probably the drivers front as you noticed. have that checked out. Try changing the bleeder screw first. if not, then the actually line itself, something is pulling air in.
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SAPierce2006
post Nov 28 2007, 08:54 AM
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We haven't lost any fluid anywhere from the system. How is it possible that we have air in the system if we haven't lost any fluid?

Another characteristic of the problem is that I can "pump up" the breaks if you will. By that I mean I can press the break down all the way to the floor and get a response out of it, and then I can release and press down again, and I'll get more of a response out of the breaks.

We went back a second time for the front drivers side caliper, and we opened the bleed valve a bit more I guess, and (although i did press harder this time), it shot out like the others. We didn't do more than 2 or 3 break compressions for either of the calipers or master cylinder (was that enough?), but either way we didn't see air come out of the system at all.

Ideas? Thoughts? Do you still think it is air in the system? Thanks in advance!
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danr960
post Nov 28 2007, 06:39 PM
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Are you using the brake pedal to bleed or a power bleeder?

If using the brake pedal, a common event is during the normal daily life of a brake pedal, it never reaches it furthest travel, now there is an area in the master cylinder that has never had the piston in, over thousands of miles, a slight groove form at the normal travel point, now you bleed the brakes pushing the pedal to the floor, this can damage the master cylinder and most likely this is what has happened.

You may have cured the initial problem but now created another problem. Whenever bleeding manually, place a piece of wood under the pedal to limit travel to the floor.

DanR '94 964 333,000 miles (99,000 on the new engine)
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