brake boss

acac
acac Posts: 348
edited June 2012 in MTB workshop & tech
hi am trying to take off the brake boss on my frame .
but cant undo them really tight.
which way is it to un do them make sure am truning them the right way thanks.
play hard ride hard

Comments

  • 386ka
    386ka Posts: 479
    I think that (and my logic insist that) they should be turned anti-clockwise.
    A much loved, Giant Trance X3 2010
  • Greer_
    Greer_ Posts: 1,716
    386ka wrote:
    I think that (and my logic insist that) they should be turned anti-clockwise.

    Yep :)
    Orbea Alma Team Carbon - Strava -Specialized Allez Sport
  • acac
    acac Posts: 348
    still cant move them
    play hard ride hard
  • Levi_501
    Levi_501 Posts: 1,105
    Weetabix???
  • acac
    acac Posts: 348
    any idea how to move them dont think weetbix help
    play hard ride hard
  • denis's mate
    denis's mate Posts: 88
    You sure they are removable?
    The ones on my Orange P7 were not. Angle grinder and a file did it, oh, and a respray.
  • apple eater
    apple eater Posts: 302
    an extension tube to give you more leverage and make them release easier
    I don't know enough to make smart r's remarks about peoples choice of parts 'n' things, yet!
  • acac
    acac Posts: 348
    its a melt 3
    play hard ride hard
  • 386ka
    386ka Posts: 479
    Link to it? I think that you are probably trying to remove non-removable bosses.
    A much loved, Giant Trance X3 2010
  • nicklouse
    nicklouse Posts: 50,675
    acac wrote:
    its a melt 3
    Malt 3 more force.

    And I guess your other topic is now closed.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • The Rookie
    The Rookie Posts: 27,812
    Good penetrating oil (not WD40/GT85 then) and/or put some heat into the boss and then cool quickly...

    If in doubt use a longer spanner!
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • pholt89
    pholt89 Posts: 56
    apple eater wrote:
    an extension tube to give you more leverage and make them release easier
    +1
    I have an old seatpost that i used like this to give me extra leverage when removing a stuborn BB
  • bikaholic
    bikaholic Posts: 350
    The key to removing stubborn frame bosses is to use a high quality, proper fitting tool. Cheap open spanners and adjustables don't have tight enough jaw tolerances.

    Paint around the threaded section may impede extraction - so you may need to scrape/heat/dissolve the paint off first.

    If the flats on the boss get rounded, then hammer against a hard surface to form flats on the upper section of the boss for an adjustable to fit.

    If that doesn't work, then grind the rounded flats flat again - to fit an adjustable.

    If that still doesn't work, then cut the boss off and grind down until flush with the threaded socket. Cover with tape or paint as finishing touches.
  • cooldad
    cooldad Posts: 32,599
    Or just use a ring spanner and give it a whack with a hammer. A sudden shock loosens most things, including bowels.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

    London Calling on Facebook

    Parktools
  • nicklouse
    nicklouse Posts: 50,675
    cooldad wrote:
    Or just use a ring spanner and give it a whack with a hammer. A sudden shock loosens most things, including bowels.
    nope. will not fit.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • cooldad
    cooldad Posts: 32,599
    Ok the non ring end then.
    I don't do smileys.

    There is no secret ingredient - Kung Fu Panda

    London Calling on Facebook

    Parktools
  • nicklouse
    nicklouse Posts: 50,675
    but it does need to be a quality spanner as the cheap ones have no strength as the flats are only 8mm apart.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown

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