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Old 11-16-07, 12:27 AM   #1
norfolk bolt
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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; 11-16-07 at 12:53 AM.
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Old 11-16-07, 12:32 AM   #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

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Old 11-16-07, 05:03 AM   #3
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Thanks for posting that, quite comprehensive

Any reason you felt the need to rebuild it?
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Old 01-06-15, 06:39 PM   #4
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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.
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Old 01-06-15, 07:30 PM   #5
Dan Burkhart 
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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.
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Old 01-06-15, 07:42 PM   #6
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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?

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Old 01-06-15, 08:25 PM   #7
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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?

That tool comes into play when removing the drive side cone. Not necessary for removing the internals from the hub shell.
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Old 01-07-15, 05:15 AM   #8
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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:
Attached Images
File Type: jpg Shimano.Nexus.7.SG-7R46.jpg (93.5 KB, 7 views)

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Old 01-08-15, 08:38 PM   #9
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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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