i am new and have problem with 96 chevy truck front brakes locking up. help

Discussion in 'Chevy Truck Forum' started by jim phillips, May 4, 2012.

  1. jim phillips

    jim phillips New Member

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    i am new here and i have a 1996 chevy 1/2 ton extended cab truck
    . the front passenger side brakes keep locking up and wont release, i have replaced calipers, pads and brake line to that wheel but it still does it. i bleed the pressure off and it works fine until i use the brakes 2 or 3 times then it locks up. please any help would be appreciated
     
  2. Down South

    Down South Senior Member

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    A common cause of that is the brake line, since you changed that.
    Proportioning valve? Does it have anti lock? Does it have crud in the banjo bolt?

    DS
     
  3. chevychase

    chevychase Senior Moderator Staff Member

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    Good point Ds

    Weird if it was both sticking could be master cylinder or valve. But just one sticking how are the guide pins at caliper is it moving freely on these?
    You changed the line. Might be a bought new/bad caliper have bought bad ones before.
    Here is info how to bleed your system might be air entrapment guessing. Weird only one sticking makes me think guides or bad caliper or like DS. said dirt.
    Chevy K1500 96 Chevy K1500 with kelsey hayes ABS - brake bleeding I - JustAnswer just click on the link
     
  4. Down South

    Down South Senior Member

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    When i got my '72 the brakes weren't as good as i though they should be. On a whim i got a one man "IV bag" brake bleeder. Its best with 2 people but whoever is driving the pedal cant mess up. The hose comes out the bottom and prevents air from sucking in around the threads of the bleeder.

    I was appalled at what came out of the brake lines. I separated in to 3 or 4 different layers.

    From what you said it took some time to get any fluid out the front. Did you collect any and inspect?
    The front main lines ant that long and shouldn't been too hard to get fluid.

    If dirty there may be crud in the Master cyl, proportioning valve or lines. A pinched line is possible too.
    New calipers shouldn't be bad / sticking.
    I don't know when anti locks started / optional but that could be a whole nother bag or worms.

    Perhaps start breaking lines at the Master and see what kind of flow you have bleeding and move on down.

    DS
     
  5. Down South

    Down South Senior Member

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    Dang Chevy, It would have to be after the front T's
     
  6. chevychase

    chevychase Senior Moderator Staff Member

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    Wish he would chime back with some info. Weird only one caliper.
     
  7. Down South

    Down South Senior Member

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    He's telling me, new banjo bolt, and trying to bleed truck running pedal goes to the floor with break light. Air?

    Not running builds up and holds good.
    Antilock?
     
  8. chevychase

    chevychase Senior Moderator Staff Member

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    He needs to bleed it like in link i left . Sounds like a lot of air to me.
     
  9. 89mudtoy

    89mudtoy New Member

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    my suburban did that my brake cylinder went bad it started sucking in air from the seal but it didnt leak took my a 2 weeks to find out what was going on
     

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