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  1. #1
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    Nexus 7 (7G-SC22) disassembly/lube/rebuild

    Hi There Mechanics.
    A while ago on the internet I came across a colour photographed and written step by step procedure for completely dismantling and greasing the NEXUS 7. Does anyone here know where that guide is? I have been searching for about 3 hours and can't find it.
    Aprreciated.
    Last edited by norfolk bolt; 11-15-07 at 11:53 PM.

  2. #2
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    Here it is, found it as you do straight after posting, if anyones interested.
    http://www.bruegelmann-shop.de/shima...E/TN_12_EN.PDF
    Last edited by norfolk bolt; 11-15-07 at 11:53 PM.

  3. #3
    Senior Member BikeManDan's Avatar
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    Thanks for posting that, quite comprehensive

    Any reason you felt the need to rebuild it?

  4. #4
    Senior Member Winfried's Avatar
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    Hello

    The link above is 404.

    Someone ditched a rear wheel with a Shimano Nexus 7 (SG-7R46), so I can experiment taking it apart and try to learn how an IGH works.

    This video shows how to disassemble a Nexus 8 Premium, so I have a couple of questions:
    1. Is it similar to Nexus 7?
    2. What tools do I need to unscrew and remove the core from the hub? They look like two big, flat spanners. Are they Shimano-specific?


    Thank you.

  5. #5
    Senior member Dan Burkhart's Avatar
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    Quote Originally Posted by Winfried View Post
    Hello

    The link above is 404.

    Someone ditched a rear wheel with a Shimano Nexus 7 (SG-7R46), so I can experiment taking it apart and try to learn how an IGH works.

    This video shows how to disassemble a Nexus 8 Premium, so I have a couple of questions:
    1. Is it similar to Nexus 7?
    2. What tools do I need to unscrew and remove the core from the hub? They look like two big, flat spanners. Are they Shimano-specific?


    Thank you.
    No, not Shimano specific.. 17mm for the lock nut, 15mm cone wrench.
    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.

  6. #6
    Senior Member Winfried's Avatar
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    What about the "specially designed tool to avoid disengaging the shift spring assembly" (a.k.a. TL8S11) in one of the videos you shot?


  7. #7
    Senior member Dan Burkhart's Avatar
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    Quote Originally Posted by Winfried View Post
    What about the "specially designed tool to avoid disengaging the shift spring assembly" (a.k.a. TL8S11) in one of the videos you shot?

    That tool comes into play when removing the drive side cone. Not necessary for removing the internals from the hub shell.
    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.

  8. #8
    Senior Member Winfried's Avatar
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    Thanks. I'll give it a try this afternoon and see how it goes.

    This is how the IGH looks like at this point:
    Shimano.Nexus.7.SG-7R46.jpg
    Last edited by Winfried; 01-07-15 at 04:30 AM.

  9. #9
    Senior Member Winfried's Avatar
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    Removing the IGH from the hub is easy enough, even with two left hands:

    https://plus.google.com/photos/11757...63869303421649

    I'll try to figure out how the IGH works before taking it further apart.

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