[Andrew Rowe]

Hi Colin, Des is right. The pin is fully threaded.You cannot press it out. It needs to unscrewed out. I don't know if you could set up to opposing portapowers with a key that locks into the groove and then apply heat to get it to turn.I have just finished boring one out with a 70mm drill and then gas cutting the remaining pin to collapse it onto itself, so it can fall out the hole.Then of couse you just need to machine new pin that will fit in smooth.
Even thinking of making a tap to clean thread, haven't checked dia. and TPI yet ,but its about 3 inch dia.
I cannot understand the reason why this was not just a pin and bush, Maybe there is somebody out there that can enlighten me on the reason why they have chosen to screw a pin into a housing like this??