Originally Posted by
mhate
Thanks so much for all the advice and pointing me in the right direction. I know I'll need to replace the pin anyway, so I may try drilling through it and see if it frees up.
Looks like you've got the proper drilled plank to hammer against, anyway. Torching the arm and using a BIG mallet against a drift of similar size to the pin as Seeds & Gordo mentioned should do the trick. I'd be careful drilling if you plan to use the original crankset with new pins. How about some pics of the whole bike or more details? Some of those old Triumphs had great graphics & cool headbadge.