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  1. #1
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    New question here. Hayes piston sticking

    I've got `03 Hayes Mag discs. The rear brake is fine, but on the front, one of the pistons seems to be sticking - it doesn't extend at the same rate as the other piston, and won't retract properly either, causing annoying rubbing. Do I need to rebleed them? Rebuild the caliper? Etc?

  2. #2
    mtbr member
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    Sticky Hayes Piston Here Too

    Quote Originally Posted by TheJ
    I've got `03 Hayes Mag discs. The rear brake is fine, but on the front, one of the pistons seems to be sticking - it doesn't extend at the same rate as the other piston, and won't retract properly either, causing annoying rubbing. Do I need to rebleed them? Rebuild the caliper? Etc?
    I have the exact same problem. Can anyone help us out?

  3. #3
    Get your freak on!
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    Quote Originally Posted by Schmoe
    I have the exact same problem. Can anyone help us out?
    I have the same problem I believe the fix is to rebuild them cause it is usually caused by dirt inside on the seal, but I may be wrong as I have not had much experience with disk brakes and just read this somewhere.

  4. #4
    Big M, Little organ.
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    Probably not a bleeding issue.

    If there was air in the system (like in one side of the caliper), you would probably be able to tell. No harm in bleeding them though. Follow the instructions from Hayes on pushing/pulling fluid to make sure you get all the air out.

    I don't think my brakes have ever moved exactly the same amount on both sides, but if they are way off one of the piston seals might be bad. Thats the only thing I can think of that would cause something like that. Good news is a piston rebuild kit is cheap, I paid around $8 each last time. Rebuilding a caliper is easy too. I'd make sure to do both pistons in the caliper at the same time though.

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