Can't Reassemble A Geha Student Pen

[Larry Barrieau]

I just took apart this Geha and now I can't get it back together. When I try to turn the piston down, the piston knob and the piston screw are sticking up and won't go down any further. There's a little hole in the tube that the screw goes through. Does that have anything to do with it.?

[TimeoDanaos]

Bumping this in case you haven't found an answer.

 

You need to attach the piston turning knob to the threaded cylinder and turn it a few times before inserting the piston rod. Try to turn the piston all the way; the knob should cover the little hole when completely turned. If it doesn't cover the hole, start over, but give the piston knob an extra turn. It might take a few tries.

 

Then you can screw the assembled piston mechanism into the pen. It might require you to do a bit of fiddling, turning the piston up and down as you go along, to get the grip you need to tighten it.

 

I did this myself with a Geha for the first time a few days ago, though with the school pen's older brother, model 705 (with a nice gold OB), which appears to be mechanically identical, and it worked more or less the first time. I would not tighten the mechanism too much, just so that it doesn't accidentally detach itself from the barrel. I have a Staedtler Mars from the same period with an almost identical piston unit, which I accidentally tightened so much that I was unable to loosen it again without a fair bit of violence.

[Larry Barrieau]

Thanks! I'll give it a try.

[Larry Barrieau]

It worked!! I learned something. Thanks so much.

[TimeoDanaos]

So glad to hear. I'm very happy with my Geha so far myself, even though the oblique nib is slanted at a significantly sharper angle than I'm used to. I've heard good things about their school pen nibs as well.

Happy writing!

[Honeybadgers]

This is common with many threaded piston fillers, in particular the wing sung 698 and mont blanc 149/146 pistons, you have to just get a little practice knowing where to start the piston in the holder before threading the knob back in to make sure it goes smoothly completely up and down.

[Dr.X]

How did you get it apart?