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Mb Turning Knob Will Not Budge


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4 replies to this topic

#1 mrp100

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Posted 12 June 2019 - 21:30

I have a vintage Monblanc 236 that I was using as a daily writer until a few months ago.  I went to flush and refill it today and could not get the turning knob to move.  It previously took some effort to turn, suggesting that the current cork was a bit on the tight side.  Does anyone know an easy hack to unstuck it?



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#2 mrp100

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Posted 12 June 2019 - 21:33

Sorry about the double post.  Not sure how that happened.



#3 Paul80

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Posted 13 June 2019 - 06:59

Hi

I suppose it depends on why it's stuck, is it the cork stuck to the barrel or the telescoping piston stuck.

Problem is to fix it you will have to remove the section and or the piston knob assembly and IIRC on these pens both are press fit and the barrel can be quite fragile, gently dry heat will help but a cracked barrel is often the result.

You could try pull the nib & feed then soaking the piston with water through the section.

Await dome more advice before proceeding.

#4 siamackz

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Posted 16 June 2019 - 07:00

Heres what I would try (for whatever its worth):
1. Force water into the barrel by placing the nib up under reasonably strong pressure running water.
2. Once water gets in then I would hold the pen nib up and make sharp but short turns of the piston back and forth just to get the cork slide over some water. This should then help it move
3. Of this works I would then open and file down the cork

An alternative would be to open the section and with a sharp pointy pick just start tearing up the cork while its stuck in the barrel

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#5 mrp100

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Posted 17 June 2019 - 17:19

Thanks Paul80 and Sia.  I will try to force water into the barrel through the nib and feed (which are not clogged) and see if I can get it loose.








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