For the tough blowers I tilt the dryer back and squirt some rustbuster in it. I use a big crescent wrench, adjusted so tight I have to pound it onto the plastic nut. I use another small crescent wrench on the pulley side of the motor. With the big crescent handle at 3 o'clock, I spin the motor shaft clockwise and smack the handle into the drum roller shaft. Do that a few times and it should pop loose.