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Old 2006-05-05, 02:28 AM   #1
unisteez
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Removing cranks without a crank puller?

I searched the forums but was unable to find anything..

I got my new cranks today and i would really like to put them on right now, but seeing as i don't own a crank puller and the bike shop is closed by now. What exactly can i do to get the old cranks off?

Thanks.
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Old 2006-05-05, 02:33 AM   #2
Unitik908
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well do as i do, gently beat it with a hammer..

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Old 2006-05-05, 02:35 AM   #3
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how can i get to the crank with a hammer? do you do it through the spokes somehow?
i would have experimented with it, but i dont want to mess anything up.
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Old 2006-05-05, 02:37 AM   #4
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well i just gently tap the sides of the crank and that will loosen them up a little, and if that doesnt work, i just pull and yank and twist till im really frustrated and they eventually come off.. so yeah its not a very good system, i recomend buying a crank puller..

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Old 2006-05-05, 02:37 AM   #5
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Quote:
Originally Posted by Unitik908
well do as i do, gently beat it with a hammer..

Chase
... good luck hitting the crank w/ only a hammer... you need some kind of punch to go through the spokes and if you don't want to scratch the cranks put a small board between the "punch" and the crank ... and hit as close as you can to where the crank meets the axle ... i have posted about this before... and it may help to hold the crank/pedal off the ground by putting the wheel on your legs
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biggest gap - over 10 feet flat ground
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Old 2006-05-05, 02:38 AM   #6
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a big bolt usually works as a "punch"
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Old 2006-05-05, 02:40 AM   #7
Daytripper63
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Quote:
Originally Posted by unisteez
I searched the forums but was unable to find anything..

I got my new cranks today and i would really like to put them on right now, but seeing as i don't own a crank puller and the bike shop is closed by now. What exactly can i do to get the old cranks off?

Thanks.
The safest way to do it is: DONT do it! no matter how bad you want the new cranks on , are you willing to risk damaging your uni and still not getting the cranks off and still have to go to the local bike shop...
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Old 2006-05-05, 02:42 AM   #8
unisteez
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haha..man this is a tough choice.
i will go take a look at it. see if i think i can do it. if not..then the guys at the shop will be seeing me bright and early tomorrow.
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Old 2006-05-05, 02:45 AM   #9
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Quote:
Originally Posted by Daytripper63
The safest way to do it is: DONT do it! no matter how bad you want the new cranks on , are you willing to risk damaging your uni and still not getting the cranks off and still have to go to the local bike shop...
I have never had a problem w/ the way i do it
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Old 2006-05-05, 04:05 AM   #10
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Use a crank puller. The less extra impact and wear you put on your hub, the better. Plus it's so much easier. Be patient, wait till your shop opens, then go buy a puller, and you never have to wait again.
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Old 2006-05-05, 04:08 PM   #11
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Quote:
Originally Posted by skroboskim
I have never had a problem w/ the way i do it
I'm going to echo what madmatt said. You might not have a problem the first time you use a hammer, or the 2nd, but the process of using a hammer applies forces to the hub and cranks at angles that could cause the metal to deform, weaken, or even crack (microscopically).

Generally the hub is made of a metal that is harder than the cranks, and the cranks are the first to deform... so you probably won't be able to get a good fit from hammer-removed cranks after the first or 2nd removal. Weakening your hub is never a good thing... especially a square-taper hub. It's like playing russian roulette... you'll never know which big drop will lead to a disasterous hub failure. Do you really want to risk a bruised pair of 'nads?
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