Is anyone familiar with this hub-based gearchange mechanism?

[Breezy_Pete]

I was fixing a rear wheel puncture on my partner's bike yesterday, and opted to replace the inner tube rather than patch. This meant I had to remove the rear wheel, which was much more of a mission than I'm used to. It has hub brake of some sort on one side, which I did managed to disconnect the cable of, and this gearchange  thing on the chain/other side.

 

There was probably a way to disco the cable and leave it in place, but I thought I'd dive in and start undoing/removing the bits and pieces with the yellow markings on.  This went well in terms of disassembly...

 

...but had me close to tears when I went to try and refit it afterwards.  The image is with things just loosely in place, not locked in properly.  Had to put it away unfixed before it had me smashing things up! 

 

Anyone got experience of this type of thing, or even know what the gear system is called, please?  It's a Dutch city-type bike I believe - won in a competition - haven't got the name of it on me, but can ask the missus to have a look in the shed if helpful.

[Breezy_Pete]

This may be a key picture, which I should have hit up youtube with yesterday:

 

Apparently it's a Shimano Nexus system.

[Breezy_Pete]

Salvation is at hand:

 

 

🕺 

 

[mac11irl]

put up some photos of the entire thing when its done Pete, could end up handy for someone along the way

[@Lee]

@Breezy_Pete I only saw this post by chance. I wish I'd seen it earlier (I had to join this forum to reply, couldn't work out why I couldn't reply at first).

I encountered the same problem a couple of years ago after moving to Germany and getting a bike that had been in storage since 1998. Given the age of the inner tube and tyres (over 22 years) I decided to replace both front and back.

All I can say is it was a complete PIT (fing) A.

Some swearing involved and some needle nose mole grips to hold a cable and lining up of dots IIRC. I wish I'd made notes now

 

I just notice your gears are external. 

 

Edited 11 August, 2022 by @Lee

[Breezy_Pete]

It's done. 😁

That video was perfect and made that bit extremely easy to sort out. I was so chuffed that he'd made the vid that I sought out a phone number for him and called to thank him. 

 

Some free publicity to add to the video link: web address - dutchbikeshop.co.uk, Tel: 01903 730089, based Littlehampton, Sussex.  He will be getting any future business to do with this bike for sure. 

 

Took me a while to figure out putting back and adjusting some of the other bits like the chain tensioner/wheel centraliser bits, and the flipping 3-piece plastic chainguard.

It is a 7-speed version as yours above Lee.

 

A few photos of the closing stages.