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Old 04-07-2012, 11:54 PM   #1
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Proportioning Valve?

so im pretty much "done" with my cj build accept for the fact i have no brakes. i redid pretty much top to bottom of the brakes, back to stock but all fresh. new rotors pads calipers, drums cylinders springs shoes. new master cylinders and booster. i got the front to have pressure when bleeding but i cant get any more then a trickle out of the rear. but i took off the line from the valve and blew them out with air to try to clear any blockage now i cant get any pressure to rebleed the back and front dont get nearly enough pressure to stop. my question is the only thing left is the proportioning valve but i hear those never go wrong so much so that no auto parts stores around here carry them to replace. any ideas on how to fix or where to get new valve? is it dumb to get one from a junk yard?

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Old 04-08-2012, 02:45 PM   #2
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Are you absolutely postve you have all the air bleed out? You might need to buy a hand vac and pull fluid from the master cylnder to the wheel cylinder. Its a real PITA...but sometimes its the only way........

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Old 04-08-2012, 08:59 PM   #3
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try www.4WD.com they deal in Jeep parts and I think they carry them.
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Old 04-08-2012, 09:57 PM   #4
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4wd.com does sell them. Depending on model and brakes they have different ones but are all around $80-$120.

I doubt you will have much luck getting one from a junkyard...even if they have a cj I bet they will be super rusty and hard to get the lines off of.

Have you drip bled them? With a whole new system there is a ton of air in there.
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Old 04-09-2012, 10:36 AM   #5
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yeah i messed with it more and i think i got it. some fluid to the rear now.
basically i ran the motor with the brake line off the rear of the PV and after a pump or two it shot some fluid out the back so i guess it had a clog or a piece in the valve somewhere.
its got a super stiff pedal now not sure whats with that but it stops!!
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