BradJohnson Posted April 15, 2011 Report Share Posted April 15, 2011 Hi, i was out on my bike today and i was riding down the road and all of a sudden my crank arm came loose and fell off. why might this of happend. I checked the bb, crank and bolt to see if anything was rounded of or if the threads had pulled out but they were fine. I have put lock tight on the bolt and put it back on should this stop it from happening again and why might this of happened ? Quote Link to comment Share on other sites More sharing options...
Sam T Posted April 15, 2011 Report Share Posted April 15, 2011 It was loose? Quote Link to comment Share on other sites More sharing options...
BradJohnson Posted April 15, 2011 Author Report Share Posted April 15, 2011 It was loose? It came loose all of a sudden though ? I haven't had problems with it before ? Quote Link to comment Share on other sites More sharing options...
Sam T Posted April 15, 2011 Report Share Posted April 15, 2011 It came loose all of a sudden though ? I haven't had problems with it before ? Check all the splines on your bb and cranks mate, make sure they're not worn. Quote Link to comment Share on other sites More sharing options...
BradJohnson Posted April 15, 2011 Author Report Share Posted April 15, 2011 Check all the splines on your bb and cranks mate, make sure they're not worn. I checked, the bb was fine and the crank looks okay. Quote Link to comment Share on other sites More sharing options...
Martin Reynolds Posted April 15, 2011 Report Share Posted April 15, 2011 It was loose? +1 Quote Link to comment Share on other sites More sharing options...
Skoze Posted April 16, 2011 Report Share Posted April 16, 2011 Did you actually bolt it on in the first place? Quote Link to comment Share on other sites More sharing options...
craigjames Posted April 16, 2011 Report Share Posted April 16, 2011 Bikes require maintenance, bolts tightening etc. other wise bits break or fall off. Quote Link to comment Share on other sites More sharing options...
BradJohnson Posted April 20, 2011 Author Report Share Posted April 20, 2011 Did you actually bolt it on in the first place? Why ask stupid questions ? If your not going to help don't comment. Quote Link to comment Share on other sites More sharing options...
DeVal Posted April 20, 2011 Report Share Posted April 20, 2011 posible a very small piece of something (grit etc)was between the crank and bb when it was tightened originally. then it poped out and made everything loose. i cant see what else it would be if your sure it was tight and everything checks out. just tighted it up again and see what happens. might just eb a particualr movement youve started doing that caused the crank to work loose. just lock tight it and keep an eye on it Quote Link to comment Share on other sites More sharing options...
BradJohnson Posted April 20, 2011 Author Report Share Posted April 20, 2011 posible a very small piece of something (grit etc)was between the crank and bb when it was tightened originally. then it poped out and made everything loose. i cant see what else it would be if your sure it was tight and everything checks out. just tighted it up again and see what happens. might just eb a particualr movement youve started doing that caused the crank to work loose. just lock tight it and keep an eye on it I put lock tight on it and now it works fine and it's all tight Quote Link to comment Share on other sites More sharing options...
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