Rear brake squeak- Mtbr.com
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  1. #1
    pro
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    Rear brake squeak

    It is very loud, and not consistent. I would say the pads are to tight on the rotor. How do I "move them away"? Hayes hydraulics. Thanks!

  2. #2
    BrassBalled DropbarNinja
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    try centering the caliper... loosen the bolts on the caliper, spin the wheel and hold the brake lever. Tighten the bolts a little bit on each side alternating each time until it is tight. That way it stops the bolts from moving the caliper.

    If that didnt do the trick, could it be that the pistons are too close? Maybe the lever might have been pulled when the rotor wasnt in there. Take the wheel off and use a flat head screwdriver and stick it in between the pads. Nudge the pistons back and forth and that'll push the pistons back. After you're done with that, recenter the caliper again.

    Let us know if that helped...

  3. #3
    pro
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    Thanks! The wheel was never off (well...recently) so I'll try try first method.

  4. #4
    pro
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    No dice. Im guessing its cable tension.

  5. #5
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    its not cable tension, theres no cables in hydraulic brakes

  6. #6
    BrassBalled DropbarNinja
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    push the pistons back...

  7. #7
    pro
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    Aww ****. I did something, and now all the fluid is out of the brakes. **** me!

  8. #8
    ...idios...
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    The loosen-brake-tighten method is useless. To align the caliper you should remove the pads and, well, align the caliper to the rotor.


    "Aww ****. I did something, and now all the fluid is out of the brakes. **** me!"

    What did you do?

    What use is a philosopher who doesn't hurt anybody's feelings? -
    Diogenes


  9. #9
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    Loose Spokes...

    You might want to go a little further out to find the reason... loose spokes can rub against each other while brakes are being applied and cause what sounds like brake squeaking. I had a similar problem with a new wheelset and just tightening the spokes up (make sure that you keep your wheel true) solved the problem.

    For reference: http://www.mtbr.com/discbrakesfaqcrx.aspx

    Brian

  10. #10
    pro
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    Quote Originally Posted by mrpercussive
    push the pistons back...
    How would I do this? There is no pressure at all in the brakes. All the fluid came out. Im pretty clueless about brakes as you can see haha.

  11. #11
    BrassBalled DropbarNinja
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    Quote Originally Posted by pro
    How would I do this? There is no pressure at all in the brakes. All the fluid came out. Im pretty clueless about brakes as you can see haha.
    where's the fluid coming out from?

  12. #12
    pro
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    Quote Originally Posted by mrpercussive
    where's the fluid coming out from?
    Well, I loosened the 2 screws at the top of the caliper, and when I squeezed the brake, it just kinda came out of the top. I tightened it back up, and though nothing of it. I did a small drop (3 ft) to flat, and then I lost all pressure. I also noticed fluid on my wheel and tire.

  13. #13
    BrassBalled DropbarNinja
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    what brakes are those? and which bolts did you loosen????

  14. #14
    pro
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    Hayes. Not exactly sure which model though..

    These

  15. #15
    ...idios...
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    And is it those two black bolts which you removed?

    What use is a philosopher who doesn't hurt anybody's feelings? -
    Diogenes


  16. #16
    pro
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    Yeah. I didn't remove em, I just backed em out some.

  17. #17
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    The caliper is made of two halves; you've loosened the bolts that hold them together. It's fixable, but you're likely to need new pads and the system will require bleeding. If you're not confident that you can bleed the brake yourself, it may be wise to take the job to a local shop.

    You should clean all the DOT fluid from wherever it's spilled with plenty of soapy water. The brake rotor should be cleaned with Isopropyl Alcohol, although a good scrub with soapy water and plenty of fresh water to rinse will also do.

    What use is a philosopher who doesn't hurt anybody's feelings? -
    Diogenes


  18. #18
    pro
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    Alright, Thanks.

  19. #19
    BrassBalled DropbarNinja
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    you loosened the wrong bolts...

    And what SteveUK said...

  20. #20
    pro
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    Im bringing it to a shop around here that specializes in DH/FR stuff. Getting the pads replaced, and new oil. I'll keep you updated.

  21. #21
    Glad to Be Alive
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    if you don't know what ur doing.......stop and ask somebody

    it is better to ask a dumb question then explain a stupid mistake
    the trick is ENJOYING YOUR LIFE EACH DAY, don't waste them away wishing for better days

  22. #22
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    What this thread needs is some silent movie background music. Classic!

    What SMT said. No one said anything about screws.

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