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  1. #1
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    Rookie mistake - no pressure to rear calipers at all.

    Note: This is my first set of disc brakes.

    While working on my bike upside down, I intended to just loosen the bolts on the bracket so that I could fix a little bit of pad rub against the disc. I have Avid Elixir 3s. Here's what happened...



    I loosened the wrong bolts.

    My lever does nothing now (just goes all the way in), and it feels like there is no pressure at all in the lines. I don't see any brake fluid anywhere, but something's definitely not right. I'm assuming that loosening those caliper bolts instead of the bracket bolts broke some kind of seal, correct?

    Is fixing this just a simple matter of bleeding the system?
    // Chris - Boston, MA
    // Cannondale Scalpel 29'er 4
    Metalguitarist.org

  2. #2
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    Re: Rookie mistake - no pressure to rear calipers at all.

    Seems weird that you would have introduced THAT much air without getting at least some fluid out....

    ...so I have to ask since you said it was your first set of disc brakes...

    Did you put your wheel/rotor back on before testing the lever/caliper? If not, the pistons just slowly keep moving towards each other but there will never be the feeling of resistance. If that happened, you will have to push them back into the caliper carefully and slowly in order to get rotor to fit back in there.

    If that wasn't it, then I would assume a bleed work, but having never loosened those screws, I don't actually know for sure.


    Sent from my SCH-I545 using Tapatalk 2

  3. #3
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    I did both, actually. As soon as I realized what the hell I did, I put the wheel back on, gave the lever a squeeze - nothing. Took it back off, gave it a squeeze again, and there's absolutely zero movement going on down there.
    // Chris - Boston, MA
    // Cannondale Scalpel 29'er 4
    Metalguitarist.org

  4. #4
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    Re: Rookie mistake - no pressure to rear calipers at all.

    I'm stumped then. Even with some air in the system, you should get some movement.
    Hopefully someone else will chime in.

    How loose did you make those bolts before you realized your mistake?

    Sent from my SCH-I545 using Tapatalk 2

  5. #5
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    I appreciate the replies all the same, haha. I have a feeling I'll be headed to the LBS tomorrow.

    I made them... pretty damn loose. :\
    // Chris - Boston, MA
    // Cannondale Scalpel 29'er 4
    Metalguitarist.org

  6. #6
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    Just to update this - a bleed did indeed fix it. Protip for fellow newbies like me: Don't undo those bolts, heh.
    // Chris - Boston, MA
    // Cannondale Scalpel 29'er 4
    Metalguitarist.org

  7. #7
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    Good stuff, working upside down is not easy.

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