I can't see penetrating oil/lube...helping much on a tapered press fit.
Question..when you say "heated it up"...with what did you heat it with, and for how long?
I/e a propane bottle torch isn't going to do it (IMO), you need to get an O/A and put the fear of ....in it.
You need to concentrate the heat around the center of the drum...that's where the thickest material is at...and you need to constantly be rolling the heat all over that area, not just in one or two spots.
Trust be, unless the pin sheared and the axle/drume is galled together...heat (correct heat) will work
