How do I remove a blower wheel from a shaft that uses a slip ring?
If you look close where the shaft and the squirrel cage or blower connect there is a thick piece of metal. Rotate the blower and look for a hole there. It's usually a set screw or grub screw holding the blower to the shaft. Most of the time these are Allen screws but I have found a few that are standard slot screws, normally on the inside through the fins unless a larger blower then sometimes on the outside. Or that is what I have found in the past.