I realize the base thread is old but here's a thought if someone else is dealing with this. The auger assembly would need disassembly to start. If it was winter, leave it out in a snowbank overnight. Being it's not winter, hopefully you have a fairly empty chest freezer you can toss it into over night. Either way, get it as cold as possible. Now arrange it so the stuck auger rake is up. Take something like a mapp torch, or better yet a couple of torches and start heating up the center of the rakes as hot as you can get it and use penetrating oil on it. I made a tool that fits over the end of the shaft and with the bottom end of the shaft on a block of wood give it some raps with a big hammer, just don't drive the rake into the auger gear case. It's taken a week or two on one of them but I finally got some movement. Once that happens I take it to a hydraulic press to take it off.