Removing exhaust fan from motor

I am trying to replace the bulkhead and i am having trouble removing the fan from the motor. It says to hold the shaft and turn fan clockwise but that does not seem to be working

Could not find info on the given Model Number so the following is for REX4634KQ2
Replacement parts for WHIRLPOOL REX4634KQ2 | AppliancePartsPros.com

The blower wheel is usually a left hand thread.
Sometimes tightening it a bit then loosening works.
Not sure what you mean by not working re: it will not turn or it is turning but not coming off.
Perhaps the following will help.
http://www.applianceaid.com/wpmotor-change.html

thank you for the advice but the fan was so stuck on there that we had to break the fan off to remove it, just like your link said.