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  1. #1
    Spin it off, Snack Fairy! Alasdair's Avatar
    Join Date
    Feb 2006
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    Upstate South Carolina
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    2006 Fuji Team Pro
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    Popping bb on Dept. Store MTB

    My dad has a barely used 10 year old mountain bike that he wants to get to riding again. He complained about how it was popping. I went over and checked it out. The rear hub was *really* loose (I'm guessing it was like that from *mart), so I tightened it up enough that it still spins freely. The bb ( the kind that the crank arms are one forged part with the spindle that you have to wiggle out) was really loose too. I tightened it so that it, too still spins freely. Still popping. I took the bb apart and checked the bearings. The retaining rings looked good as did the bearings. I greased them up some more and reassembled. Still popping. However, we now notice that it feels like it only happens when the drive side crank is just past the apex of its rotation - same place, every rotation.

    Any ideas of where to look next?
    Experience is that thing you get just after you needed it.

  2. #2
    D=RxT
    Join Date
    Sep 2006
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    Check the pedals first. Knock the bearing cups out of the frame reinstall with green or red loctite. This is assuming that the bearing races are pefect. If not, replace the B.B. Maybe 10-15 bucks if you do the work yourself.

  3. #3
    Old biker
    Join Date
    Jun 2006
    Location
    Radium Springs, NM
    My Bikes
    Custom Cammack touring road and 1987 Fisher Hoo Koo E Koo
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    Sounds like that bike has a one piece Ashtabula type crankset. Go to this link for instructions on how to service it: http://sheldonbrown.com/opc.html

  4. #4
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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    One possibility is that the bottom bracket shell isn't properly made and the bearings rock in it. If that's the case, you can't fix it.

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