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Stripped crank threads(9 posts)

Stripped crank threadsutxjohne
Apr 28, 2003 9:33 AM
Any ideas on how to get the crank off?
re: Stripped crank threadscdhbrad
Apr 28, 2003 10:14 AM
You might get a battery terminal puller from an Auto Parts store and try that. It's going to possibly scratch the outside of the arm, but since the threads are stripped, sounds like you are going to have to replace it anyway.
Good Luck.
re: Stripped crank threadsboyd2
Apr 28, 2003 12:43 PM
You could use an esy-out on the back side of the pedal axle. You drill a small hole into the axle on the centerline, knock in the easy out and use a tap wrench to turn it out. As you do that you can also push on the axle to get things moving. The problem here is that standard easy-outs are for right handed threads, and this would only work for your left pedal. You can get left handed easy outs, but they are harder to find.

After getting the pedal out you could drill and tap the crank arm and put in a helicoil insert, no problem. You could keep using the crank forever. Never give up!

Did you find out the hard way that the left hand pedal is left hand threaded?
re: Stripped crank threadsutxjohne
Apr 28, 2003 1:51 PM
Actually I was talking about pulling the cranks off of the bottom bracket spindle. I was taking my cranks off as part of a spring cleaning/tune up and when turning the crank puller pulled the threads right out of the crank. These are older 600ex cranks that came on a used bike. They worked fine. The way I see it, I have two options. I figure with enough force I could pry them off but would likely damage the crank and the bottom bracket. Second would be to put the bolt back in and ride them through the season, hope nothings goes wrong and replace them next year which I was going to do anyway.
You've summed up your choices (nm)Kerry
Apr 28, 2003 4:56 PM
I would go with your second optionRickC5
Apr 30, 2003 6:14 AM
Wait until the next year to deal with it, or until you have an indication that you may have a problem with the bottom bracket. Chances are you'll get through this season just fine.
Pickle fork.Spoke Wrench
Apr 28, 2003 5:46 PM
An automobile ball joint remover "pickle fork" will do the job, but it isn't pretty.
Go for a rideboyd2
Apr 28, 2003 6:02 PM
A mechanic years ago told me that if you were stuck without a crank puller just loosen the bolt and go for a ride. He said that in time it would come off. Surely that is worth a shot.
re: Stripped crank threads -- just went thru a similar exercisemaximum15
Apr 29, 2003 8:26 AM
Here is what I did. Located a small gear puller. The one I found was about 4 inches long. Put the crank bolt in and backed it out 4 or 5 turns. Installed the gear puller with the tangs behind the crank arm and the puller bolt resting on the crank bolt. Tighten the puller bolt, lightly tap all around the crank with a mallet, tighten more, tap more, repeat until it pops free. Then remover the puller, crank bolt, and crank arm. For what its worth, I rode these cranks for 500 miles without the bolts and they never broke free. They had been mounted for 15 years before I removed them.