How to Lubricate Electric Fan Motors. Doing small maintenance on your appliances can extend the life of them by years. An electric fan is no different. You can make an electric fan last longer if you simply lubricate the motor on a regular basis.
Lubricate a Box Fan Motor
Remove the front grill of the fan.
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Lay the fan down on a flat surface with the exposed face up. Grasp the blades firmly and lift slowly to remove them. If there is a C-clip, pry it off first.
Apply a light nondetergent household oil that is SAE20. Add no more than 1 to 2 drops at each oil port.
Spray the shaft carefully with lightweight lubricant. Avoid getting any in the motor.
Reassemble the fan and test.
Lubricate an Oscillating Fan Motor
Remove the front blade guard by prying off the clips or removing the screws.
Unscrew the spinner nut that holds on the blades by turning it clockwise. Pull off the blades.
Remove the rear blade guard by removing the grill nut and pulling it.
Remove the motor grill by first removing the screws that hold it in place.
Lubricate with nondetergent SAE 20 oil. Place 1 to 2 drops in each oil port. Be very careful not to use too much oil or get the oil into the motor.
Spray the shaft with a lightweight lubricant. Reassemble the fan and test.