If you remove the handle that locks the tailstock ram, you then start extending the ram all the way out, you can pull the ram right out of the tailstock, you might have to hold the ram, as it could turn around without the handle stopping the ram from turning in the tailstock.

You have now a large opening, as large as the screw in the tailstock, and you can drive that taper out easily with a drift and hammer.

Tailstock.jpg