A/C condensor fan lubrication?


Old 07-11-15, 02:54 PM
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A/C condensor fan lubrication?

I can't find any reference to this anywhere, so apologies if I'm missing something obvious.
The victim: an old Ruud central AC. Was old when I bought the house 10 years ago. I keep the condensor coils clean and free of leaves and debris. I don't/didn't see any obvious lube fitting on the condensor fan motor, like there is on the air handler fan motor inside, so I haven't lubed it at all.
Today it was not turning, was sticky with power off, so I WD40d all over the bearing on the end of the motor where the fan shaft comes out, and it runs OK.
So, do these things require periodic lubrication, and if so, how/where?
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Old 07-11-15, 03:00 PM
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I think you done the right thing. Fan motors don't usually have a lube port.
Old 07-11-15, 03:24 PM
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Welcome to the forums.

WD-40 is a water displacement lubricant. It doesn't do much for bearings.
You'd be much better using 3-1 motor oil or an actual motor spray lubricant.
Old 07-11-15, 03:37 PM
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Pete is correct. Contrary to what most people think, WD-40 is not a lubricant. The "WD"stands for Water Displacement. I believe it was originally developed to displace water from things such as damp distributor caps. "3 in 1" light machine oil is the recommended lubricant for motors such as the fan motor.

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