I have a Montblanc 149 which I bought new several decades ago, seventies, IIRC. I like the fine point and the way it writes. But it has always had some ink seepage onto the area where the fingers hold the pen. Early on, it was minimal, but became worse with age. I parked the pen several years ago, and retrieved it several days ago when I found this forum.
I need to stop that leak and put the pen back into service.
Here is a sketch describing the problem:
When the section holding the point is screwed into the barrel, snugly but not forced, it is a shorter distance than is permitted by the collar that goes around it. That collar is the part with the threads which hold the cap on. When the collar is installed, and the point holding section is threaded into the barrel, it cannot screw down to "snug."
That collar is too long, as can be seen from the micrometer measurements I made and noted on the sketch. It works out to be about 3/4 turn to 1 turn looser than "snug." And it cannot snug down because of that collar.
I also noticed a wee little crack along the seam where the two halves of the black plastic point holding section were fused together at manufacture. This tiny crack lands right under the collar that should be doing the sealing when the section is screwed into the barrel.
I am curious as to what is the best way to attack the two problems I see:
1. It does not snug down with the outer collar in place, because that collar is too long. Should it be machined down to the correct length, or what?
2. The point holding section has that fine crack. How should that crack be fixed, filled, or otherwise mitigated?
Any advice from FPN Members will be appreciated more than a little.
Thanks to all for reading this.
Edited by hankosaurus, 24 January 2012 - 20:53.