Montblanc 149 Single Piece Barrel 80's

[roberthansjorg]

I've got a spare MB 149 Meisterstuck barrel. The collar is stuck inside it.

I don't know what was used to seal it in. As you can see it has been chewed in attempting to get it out.

The barrel itself is still whole- it's just what remains of the collar. An ultrasonic cleaner has been used

on this barrel.

Does anyone have any advice on this problem? I'd like to save the barrel and retain the internal threads

within it.

[fountainbel]

Hi Robert

Using a triangle scraper or even a triangle file which fits tightly in the bushing bore you should be able to screw it out

wishing you success !

Francis

[stoen]

I had a similar problem with my 70s MB149. I believe the same design, materials and technology were used up to early eighties.

The nib assembly wouldn't unscrew. MB nib tool wouldn't work, because the notches were worn out. So I had to pull out the nib with a piece of soft cloth and fingers. It was the only way of not damaging the ebonite split feeder which is not being made anymore.
Once the nib was out, the friction fit feeder could easily be released.
The collar remained screwed in, similarly as in your photograph, only not chewed off.

Here comes the critical part:
This type of collar is not factory-sealed AFAIK, just screwed in and cemented with dried ink.
Few days of soaking in distilled water will help dissolving the ink. This requires patience.

Here comes the part described by fountainbel.

I would only comment that a four-angled, square profile scraper or file would be even more helpful, because of putting less pressure on critical points. Make sure you get right dimensions, which would friction fit without damaging anything. Once you feel that it friction fit inside the collar, make sure it doesnt scrape or file aginst anything. Hold the grip firmly with your fingers all around. A gentle but firm counterclockwise turn of the scraper would eventually release the collar. Don't force anything. A bit of gentle heat may help. Don't damage the collar. Even though partly chewed off, it may still function later.

 

Here's the photo of my 149 nib assembly put back together:

 

Hope this can help.

Edited February 14, 2020 by stoen