Disassembly of Montblanc Junior (620/622)

[stric75]

Hello, I am wondering if anyone know how to take apart the body of Montblanc Junior fountain pens (models 620/622) from the 1970s and 1980s. I would like to be able to remove the piston and thoroughly  clean the piston, ink reservoir, lubricate everything and put it all back together. I understand that these were cheap student pens from the 1970s and 1980s, but the ones I have are of sentimental value to me and I would like to clean-lubricate-adjust them  and continue to use them. Please let me know if you can help. Thank you.

[che63]

Hi, did you ever figure this out?  I'm trying to restore one now.  i couldn't remove the hood after lots of heat.  eventually, i heard a crack and the barrel threads broke.  it almost looks like the barrel was glued to the hood but i need to investigate that more to find out.  right now i'm trying to salvage parts but cant push the nib/feed out and can't get the piston out.  I also tried a warm sonic bath, but no luck.  I've taken other MBs apart, but i'm wondering if this pen was not meant to be disassembled.   Hopefully someone can chime in.  Thank you.  Arron

[stric75]

I haven’t figured it out. I think that the parts were glued together and the section cannot be removed/unscrewed from the barrel.  
The pens I have work,  but I’d like them to be able to “run” a big smoother. Cleaning the innards would do the trick, but  I can’t take them apart.. 

[che63]

darn.  i think you are right.  the section and the piston seem to be glued in there with something that doesn't easily melt with heat.  good luck.