Never put wd 40 in any electric motor even if the rotor is stuck from filthy dried up lubricant.
Lubricant for fan motor.
Plus it contains detergent.
Fan maintenance it s important in this throwaway society to realize the value of maintenance.
Then swivel the shaft and cleanup any excess oil.
If there is a c clip pry it off first.
First find the point where the shaft is holding the motor and clean that area.
It is now so far removed from the way most americans think it.
Grasp the blades firmly and lift slowly to remove them.
Add no more than 1 to 2 drops at each oil port.
Don t use automotive motor oil.
Then remove the fan s blade and wash it with soap.
Apparently wd 40 was the wrong oil to use.
It not only removes any remaining lube but it can melt coil wires the lightly coated copper wires twisted up in electric motors and cause an electrical short.
Step 2 lay the fan down on a flat surface with the exposed face up.
Then put in a few drops of number thirty oil on both ends of the aforementioned shaft sticking out of the motor.
Whenever you have to lubricate an electric pump bench grinder or other electric motor don t pull just any oil off the shelf.
This lubricant oil is produced by liberty oil products and it is a 100 synthetic oil compound.
Do not use any flammable lubricant such as oil.
It is excellent for smaller electric fan motors because it helps to reduce friction when there is a moving surface.
Lubricate a box fan motor step 1 remove the front grill of the fan.
Afterwards you can oil the fan.
The furnace blower motor is going to be working in very hot conditions so the type of lubricant you use is important.
Instead pick up electric motor oil like 3 in one electric motor oil about 3 at amazon.