I recently purchased a vintage Sailor Pocket pen. It arrived from Japan very dirty and I did a thorough cleanse and even soaked in soapy water. Nearly all visible old ink has been removed, but when I add ink cartridge, the pen will write for a short while and then becomes very dry with no ink. I suspect the feed has dried residual ink. I have looked for some details on disassembling the nib and feed, but find nothing.
Can anyone help confirm if the nib is friction fit and can be pulled out through the front or is there some screwed in retainer in the section which must be removed first? Are there any tools or diagrams to help. I don't want to use too much force and damage the pen. It has a nice 18K nib.