Broken Dura Ace Bottom Bracket Cup
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  1. #1
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    Broken Dura Ace Bottom Bracket Cup

    My Dura-Ace 9000 Bottom Bracket cup cracked in half. I took it to one bike shop and they said they could not remove it. I will be taking it to Spokes etc. in Vienna Va, where I bought the frame to see if they can do anything with it. Any suggestions if they can't get the BB off. It is a 2000 Serotta Legend Ti frame so would hate to not be able to fix it. I live in Annandale VA.

  2. #2
    tlg
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    Hard to say without seeing it. But a good mechanic should be able to get it out.
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  3. #3
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    I hope anti-seize compound was used when it was built.

  4. #4
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    Between a torch, a Dremel, and various hammers/chisels I've never lost that battle. As tlg says it's hard to know given the lack of a visual. Post some photos. Help us help you.
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  5. #5
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    Quote Originally Posted by stan01 View Post
    I hope anti-seize compound was used when it was built.
    Loctite is typically used on bb shell.

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    Quote Originally Posted by gwwilliams View Post
    My Dura-Ace 9000 Bottom Bracket cup cracked in half. I took it to one bike shop and they said they could not remove it. I will be taking it to Spokes etc. in Vienna Va, where I bought the frame to see if they can do anything with it. Any suggestions if they can't get the BB off. It is a 2000 Serotta Legend Ti frame so would hate to not be able to fix it. I live in Annandale VA.
    Post some pictures. I'm in Falls Church, and have been riding/build Ti bikes since Indurain last won TDF. Be glad to take a look if needed.

  7. #7
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    It has Loctite on it

    Quote Originally Posted by nova_rider View Post
    Loctite is typically used on bb shell.
    It has Loctite on it

  8. #8
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    JPEG upload fails

    I tried to add a couple of pictures, with "Upload Photos" button but the upload always fails. Also tried to add image but didn't have any success with that either.

  9. #9
    'brifter' is a lame word.
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    Quote Originally Posted by nova_rider View Post
    Loctite is typically used on bb shell.
    Uhmmm...no. Grease or anti seize, never Loctite.
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  10. #10
    'brifter' is a lame word.
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    Quote Originally Posted by gwwilliams View Post
    I tried to add a couple of pictures, with "Upload Photos" button but the upload always fails. Also tried to add image but didn't have any success with that either.
    Use an image hosting service like imgur.com. Dead simple...upload photos to imgur, click on image, click on BBCode in the column on the right, paste directly into your post here.
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  11. #11
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    ...or just reduce the size of your file so that it doesn't exceed the max allowed size...
    "L'enfer, c'est les autres"

  12. #12
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    Quote Originally Posted by cxwrench View Post
    Uhmmm...no. Grease or anti seize, never Loctite.
    Particularly titanium...
    "Refreshingly Unconcerned With The Vulgar Exigencies Of Veracity "

  13. #13
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    I say use a soft flame to heat up that bottom bracket really well up and remove the cup! heat will expand the outer bb shell and hopefully that will be enough for you to torque out the cup. Just don't force the issue too hard or else you might shred the bb threads!

    If that fails, then time to take out the dremel and cut up that damm cup up!

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    Picture

    Picture
    Attached Images Attached Images

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    Quote Originally Posted by cxwrench View Post
    Uhmmm...no. Grease or anti seize, never Loctite.
    Been using it on all my Campy UT cups for years. Not the permanent stuff, but 242 as I recall.

    https://youtu.be/fAHd2amwskU

    I guess Shimano recommends grease on theirs.

  16. #16
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    Quote Originally Posted by gwwilliams View Post
    Picture
    This looks interesting. Did the shop made any attempts to remove this?

  17. #17
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    Quote Originally Posted by aclinjury View Post
    I say use a soft flame to heat up that bottom bracket really well up and remove the cup! heat will expand the outer bb shell and hopefully that will be enough for you to torque out the cup. Just don't force the issue too hard or else you might shred the bb threads!

    If that fails, then time to take out the dremel and cut up that damm cup up!
    Aluminum has greater thermal expansion than titanium. The cup is aluminum, so heating won't work. Need to go cold if anything.

  18. #18
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    Quote Originally Posted by nova_rider View Post
    Been using it on all my Campy UT cups for years. Not the permanent stuff, but 242 as I recall.

    https://youtu.be/fAHd2amwskU

    I guess Shimano recommends grease on theirs.
    Never LocTite. Never.




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  19. #19
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    Recommended by Serotta

    [QUOTE=cxwrench;5353939]Never LocTite. Never.



    When I first purchased the frame in 2000, I had 9 speed Dura Ace on it and the BB kept coming loose. After this happened several times Serotta recommended LocTite. I have had several BsB on it since then and have always used LocTite with no problem.

  20. #20
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    Yes they had it for almost a week and then called and said that they did not feel comfortable doing it without damaging the frame.

  21. #21
    tlg
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    Quote Originally Posted by nova_rider View Post
    Aluminum has greater thermal expansion than titanium. The cup is aluminum, so heating won't work. Need to go cold if anything.
    Yup! Plus the frame has more thermal mass. It's going to suck the heat away from the BB. It'll never ever ever ever grow faster than the BB does, even if had a greater coefficient of thermal expansion... which it doesn't

    The proper method would be to fill a zip lock with ice water and stuff it inside the BB to shrink it. Or blast it with a co2 cartridge.

  22. #22
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    Quote Originally Posted by tlg View Post
    The proper method would be to fill a zip lock with ice water and stuff it inside the BB to shrink it.
    crushed ice with salt water even better
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  23. #23
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    Take it to a machine shop with a lathe, a small one, he can lathe it out, but it's going to cost you.
    Don't use locktite, except for the lowest level on anything.
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  24. #24
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    Liquid Wrench

    OUCH! Soaking it in liquid wrench or some other penetrating oil might help.

  25. #25
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    Quote Originally Posted by gwwilliams View Post
    Yes they had it for almost a week and then called and said that they did not feel comfortable doing it without damaging the frame.
    So I can assume what you've shown is not how it looked when it first broke? Were they able to remove the other cup?

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