Problem: the motor binds after replacing the rotor

Solution: Oversized Rotor

If the fan is hard to turn when the motor end cover is installed, but easy to turn

when loosened, the rotor should be removed and lightly sanded. Remove the

rotor and lightly sand by placing rotor in the palm of hand and sanding on a flat

surface making figure eight rotations. (Use the finest grade of sandpaper available).