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Issue reattaching a hub gear selector back on the rear wheel

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Issue reattaching a hub gear selector back on the rear wheel

Old 05-16-21, 12:39 PM
  #1  
Pyorapera
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Issue reattaching a hub gear selector back on the rear wheel

Good day to all,

I was switching the inner tube to my rear wheel and am having trouble putting things back together. While turning the bike around the gear I accidentally changed the gear. I didn't think much of this, but later found that I was having trouble reattaching the hub gear selector to the rear wheel - whether caused by this accidental gear change while the selector wasn't attached or some other issue.

The selector can be pushed in place, but the nut on the selector is simply spinning in place whether I'm turning it clockwise or anti-clockwise. The selector doesn't stay in place and simply jumps off.

The gear change presumably made the cable go off and the yellow adjustment line was in the wrong position. The cable has since been readjusted and the line is in the correct position. Unfortunately this didn't change anything and the nut keeps spinning in place.

Any ideas on how to proceed? I do have some pictures of the setup, but it seems that attachments aren't allowed until you've made 10 posts on the forum.
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Old 05-16-21, 03:34 PM
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JohnDThompson 
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Put your pictures in an album in your user profile. Then someone else can post links to them so we can see what you're dealing with. At this point, it's unclear to me whether you're having a problem with a derailleur, a freewheel, a freehub, an internally geared hub, or something else entirely.
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Old 05-16-21, 03:43 PM
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Originally Posted by JohnDThompson View Post
Put your pictures in an album in your user profile. Then someone else can post links to them so we can see what you're dealing with. At this point, it's unclear to me whether you're having a problem with a derailleur, a freewheel, a freehub, an internally geared hub, or something else entirely.
Thank you. English isn't my first language so I'm struggling with the correct terminology. I have added an album of two pictures showing the part.
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Old 05-16-21, 05:06 PM
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Pic assist:





That's an internally geared hub I am not familiar with. Perhaps someone else can help?
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Old 05-16-21, 05:57 PM
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Pyorapera: Who makes the hub and how many gears does it have. You need to figure out what gear the hub is in and shift the gear selector to that gear so you can reattach it. You should be able to find this info on the internet. We need more info so somebody can be of help.
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Old 05-16-21, 08:55 PM
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You have a Shimano Nexus 3 speed. The bolt head that you have circled in your photo should be the means to secure the bell crank onto the axle. It should not matter if you moved the shifter to another position with the bell crank removed. If you push it all the way on, the shift pin will move to the position dictated by the shifter position.
If you removed the bell crank without loosening that bolt, you may have to back it off a bit to allow the bell crank to fully seat on the axle where that bolt should push against the nut when tightened down.
I suspect you are not getting it to fully seat over the nut, and that is why the bolt is not securing it.



You should back the bolt out to look like this before pushing it on the axle.

Last edited by Dan Burkhart; 05-16-21 at 08:59 PM.
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Old 05-17-21, 12:08 AM
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Originally Posted by Dan Burkhart View Post
I suspect you are not getting it to fully seat over the nut, and that is why the bolt is not securing it.

You should back the bolt out to look like this before pushing it on the axle.
Thank you very much for the help. It seems that while I was trying to do as described, the nut isn't acting like it should. Trying to loosen it as pictures it just ends up spinning in place. Once I get home from work I'll open the back to see the internals and whether something is off.
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Old 05-17-21, 06:49 AM
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Originally Posted by Pyorapera View Post
Thank you very much for the help. It seems that while I was trying to do as described, the nut isn't acting like it should. Trying to loosen it as pictures it just ends up spinning in place. Once I get home from work I'll open the back to see the internals and whether something is off.
I would not be in such a hurry to open the hub.
Start by investigating the known deviation from normal operation - the retaining screw not backing out as it should.
It is not terribly difficult to strip the threads for the retaining screw. Iíve seen a few where that has happened. The hole is easily drilled and rethreaded one size larger.
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Old 05-17-21, 07:33 AM
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^^^ What he said. The issue is the retaining screw or the threads in the hole it fits. Don't go opening the hub over this.
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Old 05-17-21, 07:40 AM
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Originally Posted by Pyorapera View Post
....I'll open the back...:
Is it the back of the bell crank youíre talking about?
Not much there to see. A yoke on a pivot to change the direction of motion of the wire pull. A clamp for the shifter cable. Donít think the end of the retaining screw is even visible from there.
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