Hobart A200 Restoration

*** Update.  I hit it with a torch.  Slid right off.  Just got it hot to the touch.  Enough to liquify the ancient grease that was holding it on.  

I purchased an old Hobart A200.  I am in the process of stripping it down for repaint and maintenance.  I can’t seem to be able to get the drip ring to come off.  Anyone have experience with one of these?  

Thank you!!!!