Working on a rheem criterion rglh- 10eamer. Inducer fan motor was loose at the housing. I removed it from the furnace. Can someone tell me how the blower squirrel cage comes off the shaft. tried to turn what looks like the nut but it seems like its not wanting to come. All that is wrong is the screw is loose going to the motor but I have to get the fan off the shaft to get to it. Is it cw or ccw. the nut has four little nicks instead of flats.