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Old 08-28-12, 09:52 AM   #1
northerntier
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Rohloff screwup, help!

So I've been leaking oil on the gear box side for a while, and when servicing the chain I discovered that the various parts on my rohloff are not actually secured properly (this is undoubtedly my fault, I undid this stuff when I was installing a different cog last year).

Looking at the first picture here, I'm going to call the part I'm holding the "outside plate", and the piece secured to the hub w/ two philips screws the "inside plate".


The issue is that the outside plate does not secure tightly to the inside plate. The outside plate's screws to screw into the inside plate holes w/o the outside plate, but they only seem to tighten about a half turn. In other words, the tolerances are very tight.

W/ the outside plate on, the screws just don't engage at all.

The second picture shows that the inside plate really is pressed tightly against the hub, w/ the philips screws fully engaged.
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Old 08-28-12, 10:00 AM   #2
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i can't help specifically with your issue, but I will say that the hub is OK with the fluid leaking empty for a full cycle, so i doubt you did any internal damage.

secondly, the company is überfriendly, and i wouldn't hesitate if you want to call them directly and ask to speak (ask in English) with a technician .

gl
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Old 08-28-12, 12:29 PM   #3
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If you have Philips head screws securing the axle plate, someone must have replaced the originals, because they come with Torx head. Maybe the screws are the wrong size and thread pitch as well.
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Old 08-28-12, 05:14 PM   #4
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Originally Posted by Dan Burkhart View Post
If you have Philips head screws securing the axle plate, someone must have replaced the originals, because they come with Torx head. Maybe the screws are the wrong size and thread pitch as well.
No, there are 2 philips securing the transfer box (what I called the 'internal plate' above) to the hub, and five torx screws that are supposed to be securing the axle plate (what I called the 'outer plate') to the transfer box. It's those five torx screws that aren't engaging.

As an update, the screws don't really engage even w/o the axle plate. Might be that the torx screws are stripped, but it seems kind of odd that all five are.
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Old 08-28-12, 06:07 PM   #5
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No, there are 2 philips securing the transfer box (what I called the 'internal plate' above) to the hub, and five torx screws that are supposed to be securing the axle plate (what I called the 'outer plate') to the transfer box. It's those five torx screws that aren't engaging.

As an update, the screws don't really engage even w/o the axle plate. Might be that the torx screws are stripped, but it seems kind of odd that all five are.
OK. Been a while since I've been that far into one. I have 2 Rohloffs myself, but have not tinkered with them in a while. I don't remember any Philips head screws securing the shift mech, but my memory is notoriously unreliable.
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Old 08-29-12, 09:35 AM   #6
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The screws on my rohloff are all 20mm, not 25mm. So I bought 5 new m4x25 screws, tried to put them in, but though they engaged, they didn't go all the way down. Maybe the OEM axle plate is thinner than standard?

So I hacksawed 2mm off each, they all fit, and I clamped them down. Hurray!

Then I fixed the chain link that was the original problem, and put it back together.

It doesn't shift. Not one single gear. Even when I take it all apart again and try to shift w/ plyers it doesn't work.

The hub has been lying on it's side for a couple days, but I can't understand how that would be an issue.

??
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Old 08-29-12, 12:41 PM   #7
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Among those holes you see when you remove the axle plate are holes for the shift detent springs and balls. Are you sure you didn't run the screws into the wrong holes? If you screwed a detent ball down tight, it certainly wouldn't shift. Also, are you 100% certain you did not lose any of those detent springs? That is something you need to be very cautious of when you remove the axle plate.
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Old 08-29-12, 12:47 PM   #8
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NA service is in Berkeley Cal, ..Rohloff USA <rohloff-usa@rohloff.de>

FWIW, oil leaks out when I flipped the cog over, to wear out the other side of the teeth.

the oil seal rides on one side of the cog piece.
[ you can't flip the 13t, it's asymmetric]

Last edited by fietsbob; 08-29-12 at 12:52 PM.
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