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Old 01-05-10, 10:20 AM   #1
JTLB44
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Nightmare crank removal.

While removing my square tapered crank off my mtb (The first time it's ever been off). The threads on the drive side stripped right out. I have a replacement crank and bottom bracket. Do yall have any tips for getting the drive side crank arm out?
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Old 01-05-10, 10:43 AM   #2
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While removing my square tapered crank off my mtb (The first time it's ever been off). The threads on the drive side stripped right out. I have a replacement crank and bottom bracket. Do yall have any tips for getting the drive side crank arm out?
Grind it off if it's AL. Or use a automotive type crank puller, or use that wedge tool and hammer it off. This topic has been covered many times before.

Last edited by operator; 01-05-10 at 10:47 AM.
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Old 01-05-10, 01:12 PM   #3
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takes 5-seconds to pop off a crank with a set of motorcycle tyre-levers.
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Old 01-05-10, 02:36 PM   #4
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Ride it in circles around a parking lot with the crank bolt removed
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Old 01-07-10, 01:15 PM   #5
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I like the automotive crank puller suggestion. You might try renting a pittman arm puller from autozone.
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Old 01-07-10, 02:22 PM   #6
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pickle fork. can also rest a block of wood/pipe under the spindle and hammer at the interface.
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Old 01-08-10, 09:16 AM   #7
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Heat the arm with a propane torch and whack it off with a hammer.
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Old 01-08-10, 07:08 PM   #8
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Same thing happened to me a while back. I hammered the piss out of the crank arm, but it wouldn't budge. I tried riding on it, but it wouldn't fall off. I ended up taking a hacksaw to it. It took a long time, but it worked. However, I'd recommend using a dremmel tool with a cutting disk. You'll have it off in 15 seconds.
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Old 01-09-10, 07:16 PM   #9
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Damaged crank remover tool threads

In my case, I damaged the crank by smashing the leading (begining) part of the thread with a socket when removing the nut on the threaded stud of my vintage bottom bracked spindle.

I ordered a M22x1mm plug tap from Bike Tools Etc in Ashland, OR (info@biketoolsetc.com) for $26.50. While waiting for the tap to arrive, I tried cleaning up the damaged thread part with a small burr tool on a Dremel grinder. I was able to get the extractor tool to thread in and I removed the crank. The tap arrived the next day. I used the tap to clean up the thread some more. I had a vintage triple biospace crank in good condition that I did'nt want to damage by using a puller or other agressive methods.

It is a fine thread in soft aluminum, so one needs to be very careful in threading in the extractor. Start rotating the extractor by hand until you feel it start. If you use a wrench on the extractor to thread it in take it easy and don't force it or you may cross thread or destroy the thread. One should be able to screw in the extractor all the way in by hand. You will need a wrench on the inside bolt of the extractor to push the crank off of the bottom bracket square spines.

Cheers,

Sinch
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Old 01-09-10, 11:28 PM   #10
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Originally Posted by stonooka View Post
In my case, I damaged the crank by smashing the leading (begining) part of the thread with a socket when removing the nut on the threaded stud of my vintage bottom bracked spindle.

I ordered a M22x1mm plug tap from Bike Tools Etc in Ashland, OR (info@biketoolsetc.com) for $26.50. While waiting for the tap to arrive, I tried cleaning up the damaged thread part with a small burr tool on a Dremel grinder. I was able to get the extractor tool to thread in and I removed the crank. The tap arrived the next day. I used the tap to clean up the thread some more. I had a vintage triple biospace crank in good condition that I did'nt want to damage by using a puller or other agressive methods.

It is a fine thread in soft aluminum, so one needs to be very careful in threading in the extractor. Start rotating the extractor by hand until you feel it start. If you use a wrench on the extractor to thread it in take it easy and don't force it or you may cross thread or destroy the thread. One should be able to screw in the extractor all the way in by hand. You will need a wrench on the inside bolt of the extractor to push the crank off of the bottom bracket square spines.

Cheers,

Sinch
Great, now post that in a thread that's relevant. The OP already stated he stripped the threads out. What exactly would you be chasing?
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