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An alternative way to remove a crank arm?

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An alternative way to remove a crank arm?

Old 10-04-12, 02:03 PM
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Uplah
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An alternative way to remove a crank arm?

Hello,

It seems I'm not having much luck with updating my bike... I noticed last night that a part of the thread to the left crank arm is trashed and consequently I can't screw in the crank removal tool... Is there another way of removing a crank arm?

Thanks,

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Old 10-04-12, 02:10 PM
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Are you willing to sacrifice the crank?
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Old 10-04-12, 02:11 PM
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Delegate the problem to a Bike shop and let them do the work..
they will have a lot more tools and practice at this.

Have an automotive fan belt pulley remover?
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Old 10-04-12, 02:18 PM
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From FBinNY, multiple previous posts:

It's childlishly easy to remove a crank with a stripped puller thread.

There's the free way that works about half the time. Replace the spindle bolt, but leave it backed off about 1mm. Ride the bike up a steep embankment in a high gear so you really have to stand on the pedal. If you hear a "crack" the crank has popped free, so stop riding immediately, and you're good to go after walking back to the shop.

Or for a few bucks at a good commercial hardware store you can buy a pair of Jacobs Chuck removal wedges. (see picture) These are thin pieces with shallow tapers, and tapping the pair in from both sides will push a crank off while remaining parallel. Many shops have these, and will do the job for a nominal fee.

BTW- Chuck wedges work so well, that there's no reason not to continue using the crank arm.
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Old 10-04-12, 07:46 PM
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Originally Posted by DiabloScott View Post
Are you willing to sacrifice the crank?
I have a spare from an old bike so it won't be an issue.
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Old 10-05-12, 07:12 PM
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Originally Posted by cny-bikeman View Post
From FBinNY, multiple previous posts:

It's childlishly easy to remove a crank with a stripped puller thread.

There's the free way that works about half the time. Replace the spindle bolt, but leave it backed off about 1mm. Ride the bike up a steep embankment in a high gear so you really have to stand on the pedal. If you hear a "crack" the crank has popped free, so stop riding immediately, and you're good to go after walking back to the shop.

Or for a few bucks at a good commercial hardware store you can buy a pair of Jacobs Chuck removal wedges. (see picture) These are thin pieces with shallow tapers, and tapping the pair in from both sides will push a crank off while remaining parallel. Many shops have these, and will do the job for a nominal fee.

BTW- Chuck wedges work so well, that there's no reason not to continue using the crank arm.
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I am kinda trying the first suggestions, however my chainset and chain are in poor shape (http://www.bikeforums.net/showthread...ip-due-to-wear)...

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