Jump to content

The Fountain Pen Network uses (functional) cookies. Read the FPN Privacy Policy for more info.  To remove this message, please click here to accept the use of cookies


Registration on the Fountain Pen Network

Dearest Visitor of the little Fountain Pen Nut house on the digital prairie,

Due to the enormous influx of spammers, it is no longer possible to handle valditions in the traditional way. For registrations we therefore kindly and respectfully request you to send an email with your request to our especially created email address. This email address is register at fountainpennetwork dot com. Please include your desired user name, and after validation we will send you a return email containing the validation key, normally wiithin a week.

Thank you very much in advance!
The FPN Admin Team






Photo

Geha 790 Piston Unscrews When Filling

geha 790

  • Please log in to reply
2 replies to this topic

#1 OCArt

OCArt

    OBB

  • Member - Gold

  • PipPipPipPipPipPipPipPipPipPip
  • 4,785 posts
  • Location:San Diego
  • Flag:

Posted 16 September 2020 - 23:08

I have a Geha 790 with a tendency to unscrew the piston threads as I turn the filling knob counter-clockwise to lower the piston for filling. Even if I'm careful I can't always determine when the piston has reached the limit of travel to stop turning.

 

Can I apply rosin or some other substance to 'lock' the threads a bit tighter?

 

Thanks in advance,

Dave


----------------

Knowledge is the only wealth that increases when shared.


Sponsored Content

#2 Tweel

Tweel

    Vintage

  • Member - Gold

  • PipPipPipPipPipPipPipPipPip
  • 2,292 posts
  • Location:Indiana U.S.A., north of Orson

Posted 17 September 2020 - 07:21

I had the same problem with a Pelikan M101N, and fixed it with Ron Zorn's (rosin-based?) thread sealant.  Just a tiny droplet melted on the tip of a toothpick with a heatgun did it.  (If you do the same thing, don't hold the heatgun too close to the toothpick or the sealant will blow right off when it melts. :D )


Edited by Tweel, 17 September 2020 - 07:23.

fpn_1375035941__postcard_swap.png * * * "Don't neglect to write me several times from different places when you may."
-- John Purdue (1863)


#3 whych

whych

    Collectors Item

  • Member - Gold

  • PipPipPipPipPipPipPipPip
  • 879 posts
  • Location:England
  • Flag:

Posted 17 September 2020 - 10:49

Have you tried using a paper clip to tighten the piston outer housing into the body?

Usually this fixes the problem.








Sponsored Content




|