It is excellent for smaller electric fan motors because it helps to reduce friction when there is a moving surface.
Lubricant for fan motor.
The furnace blower motor is going to be working in very hot conditions so the type of lubricant you use is important.
First find the point where the shaft is holding the motor and clean that area.
Afterwards you can oil the fan.
Don t use automotive motor oil.
Fan maintenance it s important in this throwaway society to realize the value of maintenance.
Grasp the blades firmly and lift slowly to remove them.
Apparently wd 40 was the wrong oil to use.
Whenever you have to lubricate an electric pump bench grinder or other electric motor don t pull just any oil off the shelf.
Plus it contains detergent.
Instead you might look for a particular brand of lubrication which is right for your motor.
Then put in a few drops of number thirty oil on both ends of the aforementioned shaft sticking out of the motor.
If there is a c clip pry it off first.
It is now so far removed from the way most americans think it.
Then remove the fan s blade and wash it with soap.
Step 3 apply a light nondetergent household oil that is sae20.
Never put wd 40 in any electric motor even if the rotor is stuck from filthy dried up lubricant.
Then swivel the shaft and cleanup any excess oil.
Instead pick up electric motor oil like 3 in one electric motor oil about 3 at amazon.
Lubricate a box fan motor step 1 remove the front grill of the fan.
Add no more than 1 to 2 drops at each oil port.
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.