Advertise on Bikeforums.net



User Tag List

Results 1 to 10 of 10

Thread: PW BB question

  1. #1
    I fear angry birds Santaria's Avatar
    Join Date
    Apr 2005
    Location
    Recalculating
    My Bikes
    2013 Salsa Vaya
    Posts
    2,153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    PW BB question

    So in a nutshell, one of the other shop mechanics was removing a PW BB and didn't know he needed two tools. He pulled the entire unit through the BB and now one of the cups is permanently stuck inside. Has anybody had this issue?

    The owner was talking about having to dremel the cup out of a $3k frame and I suggested I'd check here and see if anybody else had pulled this move before? Luckily, the mechanic who did this has worked for the shop for more than 10 years. If I did it, I'd be canned for sure. Small favors, regardless.

    Thanks in advance.
    THE DEVIL

    Originally Posted by Scrodzilla
    If that was my house and you put your stupid bike in my flower garden to take a picture, I would come outside in my underwear and light you on fire.

  2. #2
    Senior Member
    Join Date
    May 2005
    Location
    Terre Haute, Lafayette, or Indianapolis, IN, depending on the day
    My Bikes
    n, I would like n+1
    Posts
    1,916
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'm not quite following, can you describe that a bit more or take a picture?

  3. #3
    I fear angry birds Santaria's Avatar
    Join Date
    Apr 2005
    Location
    Recalculating
    My Bikes
    2013 Salsa Vaya
    Posts
    2,153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The cups have to be removed at the same time, due to threading. Somehow when he pulled the one side, he unscrewed the drive-side cup into the BB shell and then got the BB out but actually LEFT the cup inside. Now it will not screw out, because it was never designed to be screwed all the way through like it is.

    I'm not at the shop, otherwise I would take some photogs and get them up here.

    Really I'm just trying to help my co-worker from purchasing a $3k frame with no BB after the boss cuts into the cups.

    On a funny note, the owner of the bike gave me the BB sans the one cup because he said they were loosey goosey dog****.
    THE DEVIL

    Originally Posted by Scrodzilla
    If that was my house and you put your stupid bike in my flower garden to take a picture, I would come outside in my underwear and light you on fire.

  4. #4
    Senior Member
    Join Date
    Oct 2008
    Location
    Ohio
    My Bikes
    Franklin Frames Custom, Rivendell Bombadil, '83 Specialized Stumpjumper
    Posts
    1,288
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Santaria View Post
    The cups have to be removed at the same time, due to threading. Somehow when he pulled the one side, he unscrewed the drive-side cup into the BB shell and then got the BB out but actually LEFT the cup inside.
    No offense, but this doesn't make sense. How can you unscrew the drive-side cup INTO the BB shell? If he screwed it INTO the shell, he wasn't unscrewing it. Right side cup-left hand threads, left side cup, right hand threads. Both threads go towards the rear wheel. Assuming it's english BB. Or is it Italian? Please clarify.

  5. #5
    I fear angry birds Santaria's Avatar
    Join Date
    Apr 2005
    Location
    Recalculating
    My Bikes
    2013 Salsa Vaya
    Posts
    2,153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Garthr View Post
    No offense, but this doesn't make sense. How can you unscrew the drive-side cup INTO the BB shell? If he screwed it INTO the shell, he wasn't unscrewing it. Right side cup-left hand threads, left side cup, right hand threads. Both threads go towards the rear wheel. Assuming it's english BB. Or is it Italian? Please clarify.
    I haven't touched it, so I don't know if it's English or Italian, to be straight. And that's the point - I think he actually screwed it INTO the shell, not 'unscrewed,' which put it into the situation it's currently in.

    It's threaded and would come out, but it's so fine, and such a small area - nobody at the shop could get their hand inside and carefully put it back into the shell threading.
    THE DEVIL

    Originally Posted by Scrodzilla
    If that was my house and you put your stupid bike in my flower garden to take a picture, I would come outside in my underwear and light you on fire.

  6. #6
    Senior Member
    Join Date
    Oct 2008
    Location
    Ohio
    My Bikes
    Franklin Frames Custom, Rivendell Bombadil, '83 Specialized Stumpjumper
    Posts
    1,288
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The mechanic must have had a brain freeze moment or something to screw it IN. Ouch. Technically you don't need two wrenches to install/uninstall, but it sure helps.

    Maybe it's just stuck though, from too much or the wrong type of loctite. Some of the stronger stuff is not for things you want to remove. It depends on who installed it, so it will never be known if the proper stuff was used or what. Or . . .if the BB threads were never chased and someone just installed it anyways, that would cause a mess too. Lots of possibilities for error.

  7. #7
    Perineal Pressurized dobber's Avatar
    Join Date
    Oct 2003
    Location
    In Ebritated
    Posts
    6,557
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You know, Phil Wood is only a phone call away.

    Personally I'm having trouble envisioning how the cup could be inside the shell, given threads are cut into the shell itself, hence the thread diameter is greater than the shell diameter. Futhermore, a cup is only about 5 mm, the threaded portion of a shell is usually much more than this.

    Does the mechanic come to work on a short bus? Seriously....
    This is Africa, 1943. War spits out its violence overhead and the sandy graveyard swallows it up. Her name is King Nine, B-25, medium bomber, Twelfth Air Force. On a hot, still morning she took off from Tunisia to bomb the southern tip of Italy. An errant piece of flak tore a hole in a wing tank and, like a wounded bird, this is where she landed, not to return on this day, or any other day.

  8. #8
    Peace and bicycle grease! une_vitesse's Avatar
    Join Date
    Apr 2008
    Location
    The Island, CA
    My Bikes
    '85 Schwinn Voyageur, Ross Mt Hood, Rossin, the Nugget
    Posts
    285
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Garthr View Post
    No offense, but this doesn't make sense. How can you unscrew the drive-side cup INTO the BB shell? If he screwed it INTO the shell, he wasn't unscrewing it. Right side cup-left hand threads, left side cup, right hand threads. Both threads go towards the rear wheel. Assuming it's english BB. Or is it Italian? Please clarify.
    if it's an italian or a french frame, the drive side threads are right side. meaning counter clockwise on the drive side to loosen them. the cups do have a very close fit on the cartridge itself, so it is possible to tighten the non drive side cup into the shell whilst loosening the drive side cup.
    it is very likely that the shop has the pro version of the bottom bracket cup tools. what they should do is order the "amateur" variety. they're the same, just not mounted on handles, and have 7/8' or 1 inch flats. i believe they don't have a lip so they should fit inside the shell ( not totally sure about this, i'll check when i get to my shop and if time permits, post confirmation) if they do, mount the tool to a long socket wrench, slip the tool in the shell and unscrew.
    Ross Mt Hood
    Schwinn Voyageur
    Fuji Cross
    Rossin
    The Nugget

  9. #9
    Peace and bicycle grease! une_vitesse's Avatar
    Join Date
    Apr 2008
    Location
    The Island, CA
    My Bikes
    '85 Schwinn Voyageur, Ross Mt Hood, Rossin, the Nugget
    Posts
    285
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    of course, this wouldn't happen if the drive side threads are reversed, because loosening the ds cup would rotate the cartridge clockwise, which would rotate the nds cup counterclockwise, which would cause the cartridge to separate from the nds cup.
    Ross Mt Hood
    Schwinn Voyageur
    Fuji Cross
    Rossin
    The Nugget

  10. #10
    I fear angry birds Santaria's Avatar
    Join Date
    Apr 2005
    Location
    Recalculating
    My Bikes
    2013 Salsa Vaya
    Posts
    2,153
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    He ended up dremeling the cup itself out. So the frame is intact, but now we'll have to replace one of the cups - which will end up going to me anyhow now that I inherited the BB from the owner.

    Even Phil Wood said they've never actually heard or seen this happening before, we're giving the guy who did this SO much grief it's not even funny.

    And the owner made a new shop rule: If the bike is valued at more than $10k, just let him deal with it in the future.
    THE DEVIL

    Originally Posted by Scrodzilla
    If that was my house and you put your stupid bike in my flower garden to take a picture, I would come outside in my underwear and light you on fire.

Posting Permissions

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