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Old 07-22-09, 10:35 PM   #1
wunderkind
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removing the crank arm

Hi,
Is the crank arm puller device mandatory to remove the crank arm? Seems like all the instructions and youtube videos use that device. Where can I get one of these apart from a bike store? Or is there an alternative?
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Old 07-22-09, 10:40 PM   #2
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Yes - you need one or you'll destroy it. Start by telling us what sort of crankset and bottom-bracket that you have. Then we can direct you to the correct tool and instructions.
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Old 07-22-09, 10:48 PM   #3
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Yes, a crank arm extractor is mandatory if you want to reuse the crankarm. You can buy extractors from LBS or online and are a very common item. Make sure you get the right extractor for the crank interface: square taper, ISIS, Octalink...

Here is an example of one for $7, that works on the above three crank arm types. It's not "shop quality" or bears a fancy name, but seems to be perfect for the weekend mechanic.:

http://www.pricepoint.com/detail/145...ank-Puller.htm
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Old 07-22-09, 10:48 PM   #4
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I'm assuming you have a square taper? The Park CWP-7C can handle square and splined (although some splined have a self extracting crank bolt.

Its a fun little tool to use . . .
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Old 07-22-09, 10:51 PM   #5
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Its a fun little tool to use . . .

Yes, I concur! It's a good demonstration of the power of a screw.
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Old 07-23-09, 12:39 AM   #6
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Yes - you need one or you'll destroy it. Start by telling us what sort of crankset and bottom-bracket that you have. Then we can direct you to the correct tool and instructions.
I wouldn't have a clue as to what type of crankset. This is for a 07 Norco Mountaineer and a 06 Trek 820.

Last edited by wunderkind; 07-23-09 at 12:51 AM.
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Old 07-23-09, 12:58 AM   #7
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Hard to tell even from the descriptions from the manufacturers. But a Park Tool CWP-7 would handle it. One says a tapered 115mm would fit, but it looks like a cartridge-bearing. No matter - CWP-7 will get it opened.
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Old 07-23-09, 01:16 AM   #8
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OK I did some research. I think they are square tapered. Both uses the Suntour XCC-series crankset. Which according to the suntour website is compatible with square BB.
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