Help! Stuck Schlumpf Shifter Button

Ok, so I've had a few rides on my new Schlumpf and I tightened one
shifter button a little too hard and it's stuck. I can' remove the
little inner screw- I think I might have rounded it off trying.

Not a problem...it's still rideable. At least until today, because now
the crank is loose on that side. I don't know how on earth I'm supposed
to tighten that crank when the Schlumpf button is in the way, and
stuck!!!!

Any ideas?

Cheers,

Ken

p/s Not related to the above, but on the other side, I snapped the
mushroom dome of the Schlumpf button, so all I have is the bit that
screws into the hub


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GizmoDuck

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GizmoDuck;1121677 wrote:
Ok, so I've had a few rides on my new Schlumpf and I tightened one
shifter button a little too hard and it's stuck. I can' remove the
little inner screw- I think I might have rounded it off trying.



Is the new KH hub, or the original Schlumpf one? I know the original
ones had two grooves in the top of the button and came with a special
tool that fitted in there to hold it still whilst tightening the grub
screw. If that's the case, then you might be able to try to unscrew the
whole button (which will take the grub screw with it) whilst holding the
shattered remains of the other button with some big pliers. For that to
work, however, the grub screw in the other button needs to be tighter
than the one you can't get out.

An alternative would be to take off the broken button, and get hold of
two very small nuts that fit on the shaft. If these are put on far
enough, and tightened against each other, then that will give you a
safer, easier way to hold the shaft whilst unscrewing the button with
the stuck grub screw.

Or else, you could just buy a new hub... and I'll pay the postage for
you to send me the old one

STM


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semach.the.monkey
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semach.the.monkey;1121714 wrote:
Is the new KH hub, or the original Schlumpf one? I know the original
ones had two grooves in the top of the button and came with a special
tool that fitted in there to hold it still whilst tightening the grub
screw. If that's the case, then you might be able to try to unscrew the
whole button (which will take the grub screw with it) whilst holding the
shattered remains of the other button with some big pliers. For that to
work, however, the grub screw in the other button needs to be tighter
than the one you can't get out.

An alternative would be to take off the broken button, and get hold of
two very small nuts that fit on the shaft. If these are put on far
enough, and tightened against each other, then that will give you a
safer, easier way to hold the shaft whilst unscrewing the button with
the stuck grub screw.

Or else, you could just buy a new hub... and I'll pay the postage for
you to send me the old one

STM



It's the new KH Schlumpf hub.

I was considering your first option, but if I tightened the broken grub
screw on the other side, it would just jam that button in there instead
of the one that is currently stuck!

I'm going to see if I can do your second option, but it means finding a
very narrow pair of pliers to grip it I think.

Your third option is not feasible because I need it for a record
attempt in two weeks time. Note that in order to get my KH 36"
rideable, I actually had to buy a second frame because my first (brand
new) frame ended up with a jammed seatpost. (see my earlier post on
using pipe cutters)


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GizmoDuck

The Induni Unicycle Tour 2009. Unicycle Tour of India. Email me for
details. www.induni.adventureunicyclist.com
The Uninam Tour 2008.....Hanoi to Saigon!!! www.uninam.net
The SINZ Unicycle Tour 2007....South Island, New Zealand
www.sinzuni.org
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I wouldn't know either how to tighten the crank with the button in the
way. Those tiny screws are easily overtightened indeed, I had a similar
issue as well. In my case, the Allen bit snapped during tightening. At
first I didn't notice the snapping, and it felt as if the screw was
rounded. So - make sure your Allen bit is OK. If it is, the only other
option I see is to drill out the little screw and get a replacement,
carefully though or you might damage the threaded hole it sits in! That
or sending it back to Florian who, if he has time, will perform some
magic. Come to think of it, a third option is to ask some magic advice
from Florian.

Not sure I understand what happened at the other side. Was it that the
dome-shaped bigger part of the shifter button broke apart from the stem
with which the button is tightened to the shifter shaft, so you only
have the middle part still on? Man, you're hard on the thing!


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Klaas Bil
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