Bottom bracket/crank question
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Bottom bracket/crank question
Alrighty, I'm a new bike mechanic and I got a pretty basic question.
I'm tearing down an old rockhopper. On the bottom bracket, there's a bolt on the left. I took it off. A threaded piece on the right. I unthreaded that. Now what? I 'm not really sure how to get the cranks off.
Do I need a ecial tool or can I bang it off? I didn't want to mess anything up with my hammer unless I had to.
Thanks in advance for any help.
-jeremy
I'm tearing down an old rockhopper. On the bottom bracket, there's a bolt on the left. I took it off. A threaded piece on the right. I unthreaded that. Now what? I 'm not really sure how to get the cranks off.
Do I need a ecial tool or can I bang it off? I didn't want to mess anything up with my hammer unless I had to.
Thanks in advance for any help.
-jeremy
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Would help it you can ID the BB type you have, from your description, it sounds like square taper, if so, mallet, hammer, deadblow, take you pick, and hit it, it will come off.
You can read more here https://www.parktool.com/blog/repair-.../crank-service on crank service / removal. though, unless you have an external type, with the safety pin, there is normally only one bolt to remove on each side for Square taper, or ISIS/Octalink.
You can read more here https://www.parktool.com/blog/repair-.../crank-service on crank service / removal. though, unless you have an external type, with the safety pin, there is normally only one bolt to remove on each side for Square taper, or ISIS/Octalink.
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You need a crank puller. The Park tool page linked to above will cover all the details.
- Joel
- Joel
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That's a square taper crank and you need a crank puller for square taper. $10 to $15 and an easy job. Or...whack with a hammer and maybe get a new BB. Your choice.
#11
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Sometimes I find it hard to comprehend how certain questions make their way to the forum. I would think that if you know the term bottom bracket it would be an obvious next step to search for repair/disassemble/remove/overhaul bottom bracket.
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Yeah, people these days. Geez.