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Help! Brake Problem.

 
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Old 07 Jan 2012, 04:52 pm
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Default Help! Brake Problem.

I just changed the front calipers, master cylinder, and pads. I bled the system, but I can't get a hard pedal. Do I need to do anything special while bleeding? Does the key need to be on or something?

Any help would be greatly appreciated.
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Old 07 Jan 2012, 04:59 pm
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Default Re: Help! Brake Problem.

You have to bleed all four wheels, the PT has a diagonal brake system. Left front and right rear share one side of the master, right front and left rear share the other side of the master... Also be sure that the master doesn't run dry.
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Old 07 Jan 2012, 05:06 pm
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Default Re: Help! Brake Problem.

I did bleed all four wheels. I can pump the pedal and build up some pressure, but then when i step off the pedal the next pump goes straight to the floor. Is the anti-lock break system doing something? I thought I might be missing something...
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Old 07 Jan 2012, 05:10 pm
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Default Re: Help! Brake Problem.

What is the procedure for bleeding these brakes? I guess I could be doing it wrong. This is my uncles car and I am trying to help him out.
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Old 07 Jan 2012, 05:50 pm
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Default Re: Help! Brake Problem.

You either have air in the system or a defective master cylinder. Also check the brake hoses for cracking or expansion while braking. You're supposed to bleed the master cylinder before you hook up the brake lines. After that bleeding is pretty much the same as any car. I use a one person compressor driven brake bleeder.
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Old 07 Jan 2012, 06:59 pm
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Default Re: Help! Brake Problem.

I did bench bleed the master cylinder before I installed it. I'm just not sure why I can't get a pedal. I don't see any leaks anywhere. Maybe to new master cylinder is defective. Thanks for all your help guys.
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Old 08 Jan 2012, 04:31 am
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Default Re: Help! Brake Problem.

Make sure the calipers are installed with the bleeders on top...otherwise you will never get all the air out. It is sometimes possible to install them upside down (on the wrong wheel).
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Old 08 Jan 2012, 10:32 am
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Default Re: Help! Brake Problem.

There was a bleed procedure for the Neon, IIRC, but I've never followed it.
All, except one wheel will gravity bleed.

I had cars, where even power bleeding didn't work, that I simply 'exercised' the pedal until the air worked out.
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Old 09 Jan 2012, 04:51 am
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Default Re: Help! Brake Problem.

If you do not have a vacuum brake bleeder, it takes several tries to get the air out. The person pumping gets a leg cramp and you do not get the air out.
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