Anyone know how to take apart a greddy T517z????

Iv taken the compressor and exhaust housing off, and now im stuck with the turbines that are attached to the middle piece where the oil feeds/drains.

I took the bolt off that holds all three together, but now I cant get the turbine from the compressor side off. Do you spin it out as if it was a screw, because its not coming out. Do you guys just think that the things frozen like this and I have to put in force?. I dont want to break it the blades are clean.

Thanks