Spindle pulley locked onto shaft!

Hi, has anyone any experience with this spindle motor pulley on my Bridgeport Interact 1 series 2. I am changing the motor but wanted to reuse the pulley. I can get a 3 leg puller onto it but even with heat and a ton of force it only moved 1/8 of an inch and is now locked solid. It has two grub screws on the top (pic) which I have unscrews but wondered are you supposed to remove this type with an hydraulic feed contected to these two grub screw holes?
Any help appreciated.
Attachment 32049
Attachment 32050

Are 100% sure there are no grubscrews on the side?
And if there is, that they've not been doubled up?

I'll check if they are doubled up in the morning m_c, I wonder what the grub screws are there for? Def none on the side.Attachment 32051