You should oil the motor bearings.
Attic fan motor oil.
There is a bearing on each end of the motor.
The bottom one is under the very center silver spot in your photo and the other is where the shaft enters the motor on the top side.
To check if there s enough oil in the fan take a pipe cleaner and fold the end over 1 2 inch to.
How to lubricate electric fan motors.
It is excellent for smaller electric fan motors because it helps to reduce friction when there is a moving surface.
Then slowly pour 1 2 ounces of oil into the oil hole.
This lubricant oil is produced by liberty oil products and it is a 100 synthetic oil compound.
They are in the very center where the fan shaft goes.
You can make an electric fan last longer if you simply lubricate the motor on a regular basis.
Doing small maintenance on your appliances can extend the life of them by years.
An attic fan doesn t require annual maintenance.
Yes 3 in 1 oil would be good to use.