What is the size of the Blower Wheel lock nut and does it require a special tool?
Answer Dennis, The "set screw" or "Lock nut" that holds the blower wheel to the motor shaft is a "hex head" and will require a set of "allen wrenches" or "hex key" wrenchesto remove and install the wheel. I could be wrong, but it appears the set screw would require a 3/16 or 1/4 inch wrech to loosen and remove the set screw. Thanks and Good Luck
Will I need a new fan to replace the motor?
Answer Hello Ken. No, you can unscrew the set screw on the blower wheel Y707985 and slide it off the motor shaft. Hope this helps.