Advertise on Bikeforums.net



User Tag List

Results 1 to 14 of 14
  1. #1
    Elite Rep
    Join Date
    Aug 2004
    Location
    Melbourne - Australia
    Posts
    2,097
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Ok, i've stuffed up my hydruallic brakes...any help?

    Well i just took the front wheel out to change the tyre and i put it back in and now the front disc is rubbing and the lever is WAAYY to 'tight'. Whats happened?

    I also accidently squeezed the lever when the rotor was not in, but the pads returned to there normal position, but i think this has something to do with it....?

    How do i get the brake to 'back off' a bit and stop rubbing? (yes its in correctly, i've mounted it about 5 times now.), also how do you back off the lever so its like it was when it came stock (not too tight?).

    I'm going on an XC ride tommorow and i really would love to get this sorted out ASAP, the bike is rideable but its only about 3 - 4 days old so i'm not too impressed i've stuffed up the brakes!

    (The brakes are Hayes HFX9 XC Hydraullic)

    Any help MUCH welcomed

  2. #2
    Senior Member
    Join Date
    May 2004
    Posts
    138
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You need to pry the pads back with something. A big flat tipped screwdriver might do. Just be gentle hehe.

  3. #3
    Senior Member vw addict's Avatar
    Join Date
    Jan 2006
    Location
    East coast
    My Bikes
    Specialized Tarmac Expert, Cannondale R700, Specialized Langster, Iron Horse Hollowpoint Team, Schwinn Homegrown
    Posts
    2,678
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    take wheel out, stick flathead screwdriver between pads, CARFULLY pry pads apart(untill they bottom out on the caliper body), put wheel in, loosen brake caliper mounting bolts, stick 2 buiness cards on either side of rotor, pull brake lever and hold, tighten caliper mounting bolts, release lever, take out buisness cards. Hopefully the caliper should be perfectly centered, if not fine tune it.

  4. #4
    Caustic Soccer Mom apclassic9's Avatar
    Join Date
    Jun 2005
    Location
    Millstone WV
    Posts
    1,759
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    if vw's advice doesn't work, you may have to bleed the lines. Always put a shiv in when you take the wheels off, and don't squeeze the handle......

  5. #5
    Cheers! 2wheeled's Avatar
    Join Date
    Feb 2005
    Location
    Woodinville
    My Bikes
    Scott Addict R15, Cadd 9
    Posts
    1,284
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There's also a great section on this at Part Tools
    http://www.parktool.com/repair/readhowto.asp?id=126

  6. #6
    Lost in the Black Hills mx_599's Avatar
    Join Date
    May 2005
    Posts
    5,725
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    take off MC cap and "re-set" the pistons

    sometimes a +/- vacuum is created and it needs to be destroyed!!!

  7. #7
    Wood Licker Maelstrom's Avatar
    Join Date
    Apr 2002
    Location
    Whistler,BC
    My Bikes
    Transition Dirtbag, Kona Roast 2002 and specialized BMX
    Posts
    16,888
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Stop stuffing your brakes, you are bound to break them that way

  8. #8
    Banned. Hank Rearden's Avatar
    Join Date
    Dec 2005
    Posts
    488
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by apclassic9
    Always put a shiv in when you take the wheels off,
    I have never put a shiv of any kind between my pads when I remove my wheels.

  9. #9
    Lost in the Black Hills mx_599's Avatar
    Join Date
    May 2005
    Posts
    5,725
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Hank Rearden
    I have never put a shiv of any kind between my pads when I remove my wheels.
    neither do i

  10. #10
    Caustic Soccer Mom apclassic9's Avatar
    Join Date
    Jun 2005
    Location
    Millstone WV
    Posts
    1,759
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    And I bet you're not silly enough to squeeze your brake levers while you have the wheels off.....

  11. #11
    Elite Rep
    Join Date
    Aug 2004
    Location
    Melbourne - Australia
    Posts
    2,097
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thats what caused it all in the first place...silly me. The brakes are better now, the lever is loosining up and its not rubbing, should work out fine. But i still need to learn a bit more about these advanced so called Hydraullic brakes .

  12. #12
    Elite Rep
    Join Date
    Aug 2004
    Location
    Melbourne - Australia
    Posts
    2,097
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by mx_599
    take off MC cap and "re-set" the pistons

    sometimes a +/- vacuum is created and it needs to be destroyed!!!

    Whats an MC cap? How do i reset pistons? (sorry i'm am a new newbie to this)

  13. #13
    Lost in the Black Hills mx_599's Avatar
    Join Date
    May 2005
    Posts
    5,725
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by blue_neon
    Whats an MC cap? How do i reset pistons? (sorry i'm am a new newbie to this)
    master cylinder cap on the lever perch. make sure the "accordian" bladder is back to its neutral position if there is one on your model. while the cap is off get the pistons to where you want them.

  14. #14
    Senior Member
    Join Date
    Dec 2005
    Posts
    320
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    push the pad back it with something.....

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •