I have a 22" kettle that came with a wheel that was frozen up. I tried to loosen it gently, and eventually got the plastic wheel off. Then found that the steel sleeve inside the wheel that slips over the triangle axle did not come off with the wheel, and is rusted to the axle. I've tried grabbing the sleeve with pliers, and put leverage on it all the ways that i can figure with no results. The sleeve is about 1.5 inches long, and i am thinking the rust runs down the length of where it touches the triangle axle.
Any suggestions on removing the rusted sleeve?