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Thread: help with crank

  1. #1
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    help with crank

    when i try to pull it off the spindle with the crank puller the thing my crankpuller screws into is either miss threaded or stripped any ideas ..

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    ThumperChump. ThunderChunky's Avatar
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    Quote Originally Posted by squirrely1 View Post
    when i try to pull it off the spindle with the crank puller the thing my crankpuller screws into is either miss threaded or stripped any ideas ..
    is it an older/lower quality crank? if so, i'd say the best idea is to get them mother****ers off however you can and replace the crank and bb. this is of course if you have money, otherwise i guess you could tighten the crank arm back on and keep using it until you can save up. anyone with a better suggestion, please interject.

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    Senior Member pirate's Avatar
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    the threads might be filled with sand or grit, try cleaning them out. worth a shot. Also, what kind of cranks are they? some older cranks need special threaded pullers (old french cranks for instance.)
    “When the spirits are low, when the day appears dark,
    When work becomes monotonous, when hope hardly seems worth having,
    Just mount a bicycle and go out for a spin down the road,
    Without thought on anything but the ride you are taking.”
    -Arthur Conan Doyle


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    crank

    it is a 74 bianchi if that makes aidfferent i tryed cleaning it and everything

  5. #5
    Senior Member pirate's Avatar
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    well then, sounds like its stripped. I don't know what to tell you.
    “When the spirits are low, when the day appears dark,
    When work becomes monotonous, when hope hardly seems worth having,
    Just mount a bicycle and go out for a spin down the road,
    Without thought on anything but the ride you are taking.”
    -Arthur Conan Doyle


  6. #6
    70mm4$!n! freeskihp's Avatar
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    dremel it off, you will **** up the BB though
    "The only reasons anyone should ever ride in the rain is because a) you’ve had your license to operate a motor vehicle suspended by the state. b) you’re in a bike race in which case you’re not allowed to use fenders anyway. c) you’re from Portland- in which case my main problem is with your neck beard- not your bicycle...If you need to train when it’s pissing rain- buy a trainer or one of those cheap charter flights to Mallorca."

  7. #7
    yo yo yo yo yo
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    sounds like you stripped the dust cap threads.. if the bb is cup a loose ball type just take that off with the crank attached and call it a day..

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    stay free. frankstoneline's Avatar
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    Hacksaw.
    xoxo David
    Quote Originally Posted by metaljim View Post
    katana's out frank! always be ready.
    <edited>

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    I think I remember Sheldon Brown addressing this. He said to just ride it around the block, close to home, until it fell off. Just make sure you can walk home.

  10. #10
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    sounds like it's either cross threaded, or a few threads have a burr, or have stripped out: little spring shaped shavings will come out as you unscrew it if it's stripped out.

    you can tighten it back up until you can remove it but be careful not to overtighten it

    once removed, you can chase the threads if it's not stripped out, but once cross threaded they usually strip out when you either chase it, or re-tap it.

    it is possible to bore out a BB, install a sleeve, and re-cut the threads, or bore & tap it for a custom heli-coil (STI) but this is major surgery and usually $$$$$.

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    Well you could get a hacksaw and cut the arms off the axle especially if the crank needs to be replaced(just dont cut too deep and cut the axle).

  12. #12
    dmg
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    If there are good bike shops around you (esp. one specializing in old/utilitarian bikes) you should be able to have them chisel off the crank. I forget what the tool is officially called, but it's basically a wedge with a slot for the spindle to go through. You place the tool between the BB shell and crank and give it a few whacks with a hammer, and it will come off.

    If not and it's not a rusted mess, I would oil the crap out of it and ride around your block until it loosens up and comes off on its own. Don't try to do anything dumb like whaling on it with a hammer through the frame and denting your seat tube...

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