crank problems

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8/15/2016 7:09 PM

i just got a new to me bike and i am having problems with the three piece crank. the left side keeps trying to come off while im riding i have tryed taking it off and putting it back on and tightening the nut down but it still keeps trying to come off this is my first three piece crank so im not really sure what to do. it looks like it got hit by a car at some point because there is damage on the left side can someone give me advice before i end up buying a new crank

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8/15/2016 7:32 PM

Pics of the damage?


Could be a small issue where you're just not tightening them properly or they're not on the spindle evenly, but could also be a larger problem such as something's damaged or the splines are worn out.

What crank is it? Is it one with a center bolt & a pinch bolt, or one with just the center bolt?

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8/15/2016 7:47 PM

O

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8/15/2016 8:21 PM

Sounds like maybe the crash bent the arm or spindle and that's why it's not clamping properly

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8/15/2016 11:54 PM

Sounds like the splines are worn, or the crank arm isn't going far enough onto the axle

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