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Originally Posted by slreno1217
i had some brake lins rust through and lost all fluid to rear and front brakes.
well got the lines replaced and cannot get the rear brakes to bleed, i knbow i am supposed to work from the farthest brake forward but couldnt get the rears to bleed for nothing..
got the fronts done fine, but i was told there is some knind of pin in the master cylender that is some kind of saftey precaution when the lines lose fluid it keeps one set of the brakes from losing all fluid.. andone know what this might be and how to reset it so i can get fluid to the rear lines?
forgot to mention its a 1989 chevy scottsdale 2500.
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There is a equalizer/portioning valve where front and rear brakes lines run threw with a pin in it that shuts one end off if one end loses
pressure. It may have a small rubber boot on it.
Look under master cylinder for a valve that the front and rear brakes lines go threw.
If the pin is way out push it in a little and try it. If it is all of the way in you may not be able to pull it out.
If that is the case open a bleeder valve or a line to the other end at the equalizer valve and step on the brake pedel and see if the valve trips back the other way and lets you bleed the rear.
A pressure bleeder works better and also they make a special tool to hold the pin centered for bleeding.
Good luck and 2000CAYukon may be able to help you to.
MT