I am progressing with repair of an Onoto 6233 which arrived solid with ink, with a fossilised cup washer, and the rod broken at the blind cap.
My last tasks in disassembly are to remove the pins in the plunger and in the blind cap. Trying to punch them out has proven difficult. I was using a dowel with a short length of stiff 0.8 mm wire embedded in its end, and light taps with a small hammer.
Before I get a bigger hammer, I was wondering whether I might not be better off simply drilling them out, using a drill press?
I have not tried heat at this point, being a little doubtful of how useful it would be. I could also try the USC as a loosener except the blind cap is BHR which I do not want to immerse too long in water.
Of course, I could simply re-use the existing rod by gluing its end into the cap (thus not having to disassemble that part) but the pen would then become difficult to disassemble again without worsening problems. The purist in me does not like that but the practical in me wants a working pen.
So, at the moment I am leaning toward drilling out, as I will have new pins anyway. Any thoughts or suggestions on that, or effective things to try which do not require quite the same precision?