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Thread: Weird Crank???

  1. #1
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    Weird Crank???

    Hello,

    I am new to this forum so please feel free to blast this post if it's in the wrong section etc.

    I have an old ROAD KING bike which I am fixing up and the cranks are completely weird on it. The crank arm has a bolt that runs through it and when I remove the nut on this bolt, nothing really happens. The bolt seems solid through the arm. Also, the typical dust cap is nothing more then a solid circle. I can't access it, remove it or move it.

    I am thinking that maybe the arms were pressed onto the bottom bracket but I'm not sure.

    Any help removing the crank would be greatly appreciated.
    I have attached a photo bucket link so that you can see 2 pictures of said crank. If you need more pics etc. please let me know.

    http://s67.photobucket.com/albums/h288/agentmm/CRANK/

    Thanks in advance,

    MM

  2. #2
    The Improbable Bulk Little Darwin's Avatar
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    I can't see the photos due to firewall filtering at work, but by your description, I am guessing that you have a cottered crank.

    If so, this page will tell you much of what you need to know:

    http://www.sheldonbrown.com/cotters.html

    Edit: Basically the cotter is the "bolt" that had the nut on it, and it needs to come out of the crank then the crank will come off of the spindle.
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  3. #3
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    that is soooooo sweet....

    thank you

  4. #4
    Senior Member 04jtb's Avatar
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    +1 to Little Darwin
    Quote Originally Posted by cc700 View Post
    i jam my thumbs up and back into the tubes. this way i can point my fingers straight out in front to split the wind and attain an even more aero profile, and the usual fixed gear - zen - connectedness feeling through the drivetrain is multiplied ten fold because my thumbs become one with the tubing.
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    http://flickr.com/groups/dawes_galaxy/

  5. #5
    Senior Member Cannondaler's Avatar
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    You need to gently tap out the cotter with a small hammer being careful not to damage the threads.

  6. #6
    Senior Member bikeman715's Avatar
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    the best to remove it is by a cotter pin press. that way you can reuse the pin.

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    Senior Member orangepaint's Avatar
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    If you use a wood block and a hammer, it doesn't mushroom the tip of the cotter pin.

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    Quote Originally Posted by Cannondaler View Post
    You need to gently tap out the cotter with a small hammer being careful not to damage the threads.
    Gently? Come on, cotters need a LOT of force to remove and gently won't do it. The OP need to support the crank arm with a pipe or block of wood with a relief hole while whaling away with a BIG hammer to remove the cotter.

  9. #9
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by HillRider View Post
    Gently? Come on, cotters need a LOT of force to remove and gently won't do it. The OP need to support the crank arm with a pipe or block of wood with a relief hole while whaling away with a BIG hammer to remove the cotter.
    Well... cotters are pretty soft. Whacking it with a hammer with any amount of force will usually beat the threads to a pulp. Better make sure you have replacements in hand before you try it. They're pretty cheap: http://www.bikepartsusa.com/bikeparts/item/01-98554/ . I think you have the most common size: 9.5mm diameter, but measure to make sure.
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    Thank you for the posts...
    I removed the pins and I think they are in great shape so I will attempt to re-use them and if not, I'll check bikeparts out...

    thanks again for your time

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