I am trying to remove a gear (approx 3 inch Dia) from the end of a ball screw (approx 1-1/4 inch). It seems to have a taper pin, at least the manual shows a taper pin. the head of the pin is rounded and sticks out about 1/32 from the collar of the gear. there is a through hole on the other side of the collar , which is empty. I have been trying to punch the pin out from the 'hollow'.
I have tried everything I can think of except heat (there is a risk of fire in this location). I made a punch , got a big hammer and had a mechanic try to loosen it, no results. I then built a device alot like a 'nut splitter'. thinking it could 'push' the pin out. I made it very heavy duty and used a hardened drive screw , again no results. (except broken tool).
is there a trick ? or a hydraulic tool I should buy ? or a magic spell. FYI I am doomed if I can't remove it.