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bleeding brakes???

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Old Feb 8, 2006 | 11:08 PM
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bleeding brakes???

1988 F-150 4x4 5.0. I was trying to bleed my brakes this past weekend and I started in the rear and absolutely no fluid came out. But the front brakes squirt all day long. And there is/was plenty of fluid in the reservoir. I followed the lines and had no leaks, cracks, kinks..... I had my buddy in the cab pushing the pedal for me. Can anyone help me out on why I am not getting fluid to the rear brakes? Thanks.
 
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Old Feb 9, 2006 | 03:56 AM
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............
 
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Old Feb 9, 2006 | 03:57 AM
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You need to do this.

 
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Old Feb 9, 2006 | 11:39 PM
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stuart1, i have no idea what that is.
 
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Old Feb 10, 2006 | 05:42 AM
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That is in the proportioning valve.
The small pin must be pulled out and held while the brakes are bled then released.
If you have a 350 the pin must be pushed in.
 
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Old Feb 10, 2006 | 07:36 AM
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Interestingly, I didn't do that to mine, and bled an entire new system, except for the valve, with a suction bleeder. It was a good bleed too. Maybe it is because the suction isn't compressing air.
 
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Old Feb 10, 2006 | 11:10 AM
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I will mess with it again this weekend. Where is the proportioning valve located?
 
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Old Feb 11, 2006 | 07:11 AM
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I think on a newer truck like yours it is right under the master cylinder. On mine it was mounted to the frame below the master cylinder. Follow the lines from the master cylinder and they will go to it.
 
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Old Feb 11, 2006 | 12:49 PM
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where do you get that little tool for holding it out?
 
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Old Feb 11, 2006 | 02:24 PM
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It doesn't take much to hold it out.
I use a small kelly clamp.
 
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Old Feb 11, 2006 | 04:08 PM
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whats a kelly clamp. i've never heard of that.
 
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Old Feb 11, 2006 | 07:11 PM
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They are used in the OR. You can get one at a drug store.
 
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Old Feb 11, 2006 | 09:06 PM
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guess i shoulda asked my wife, who'da thunk.
 
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Old Mar 6, 2006 | 06:03 PM
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how far do u need to pull that pin out when bleeding?

tks alot,
~Nate
 
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Old Mar 6, 2006 | 08:04 PM
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It only moves a short distance, so all the way and hold it there.
 
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