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  1. #1
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    Shimano Nexus - 7 lock ring do not comes off

    Iím trying to change the sprocket for the second time on my Shimano Nexus Inter 7 SG 7C-18 hub and the lock ring do not comes off like it should (like on that video http://www.youtube.com/watch?v=Dz-3PfboKTw from ~40s on).

    If anybody encountered similar problem please report.

  2. #2
    Senior member Dan Burkhart's Avatar
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    Quote Originally Posted by xRus View Post
    I’m trying to change the sprocket for the second time on my Shimano Nexus Inter 7 SG 7C-18 hub and the lock ring do not comes off like it should (like on that video http://www.youtube.com/watch?v=Dz-3PfboKTw from ~40s on).

    If anybody encountered similar problem please report.
    The right tool is the key. A small, flat bladed screwdriver works best, and you only need one.
    This video shows cog removal from a Sturmey Archer hub, but the process is the same for Shimano.
    https://www.youtube.com/watch?v=x5EU0U-6FXg
    Gearhubs demystified and other cool stuff.


    The greatest mistake you can make in life is to be continually fearing you will make one. Elbert Hubbard.

  3. #3
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    Nope I stalled much earlier even before removing shifter. I have a problem with a plastic lock ring that locks the shifter, not a cog. Do not have any problem with a cog removal.

  4. #4
    Senior member Dan Burkhart's Avatar
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    Quote Originally Posted by xRus View Post
    Nope I stalled much earlier even before removing shifter. I have a problem with a plastic lock ring that locks the shifter, not a cog. Do not have any problem with a cog removal.
    Oh, I see. You're talking about the cassette joint lock tab. First off, I've never seen a plastic one, always metal in my experience. I've never had a problem removing those. Just twist counter clockwise until the yellow dots align, and lift straight off.
    If it's stuck, maybe it needs a little mechanical encouragement, but I have never encountered that problem.
    Gearhubs demystified and other cool stuff.


    The greatest mistake you can make in life is to be continually fearing you will make one. Elbert Hubbard.

  5. #5
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    Quote Originally Posted by Dan Burkhart View Post
    Oh, I see. You're talking about the cassette joint lock tab. First off, I've never seen a plastic one, always metal in my experience. I've never had a problem removing those. Just twist counter clockwise until the yellow dots align, and lift straight off.
    If it's stuck, maybe it needs a little mechanical encouragement, but I have never encountered that problem.

    Yes, like on the video. I turn the lock counter clockwise, the yellow dots align, but still unable remove it. May be I will remove it forcefully but in that case will need to find replacement.

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