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Old 08-19-2018, 02:00 PM   #1
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Repair or replace bath fan?


This pix is our bath fan(s), 2. Hall bath screaches. Master bath starts SLO, gets hot to speed and screaches.
Obviously bearings are going. Has anybody tried relubing or replacing the bearing on these?

This question is probably a non-starter but thought I'd put it out and maybe learn something.

TIA, CVT
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Old 08-19-2018, 03:39 PM   #2
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Re: Repair or replace bath fan?


Not familiar with the modal but some motors are replaceable.
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Old 08-19-2018, 03:41 PM   #3
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Re: Repair or replace bath fan?


Most of those fans I have seen have bushings, not bearings. You can lube(oil) them. I have done it. Depending on how bad they are they may run for along time before needing oil again or they may run for a month.
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Old 08-19-2018, 04:05 PM   #4
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Re: Repair or replace bath fan?


If you can get a number off the motor good chance you can replace it. Fixture still looks great. Model number may help as well but a lot of the older fixtures they’re not legible
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Old 08-19-2018, 06:08 PM   #5
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Re: Repair or replace bath fan?


Thanks! Worth a shot then.
As to model #, I haven't a clue. New old house to us and I need to find that out, for certain. Even Google's image search came up 0!
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Old 08-19-2018, 06:59 PM   #6
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Re: Repair or replace bath fan?


+1 to what joed said, sleeve bearings can be lubed , what do you have to loose.
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Old 08-19-2018, 08:10 PM   #7
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Re: Repair or replace bath fan?


Have also replaced motors on ones that lubing no longer worked.
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Old 08-22-2018, 09:48 AM   #8
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Re: Repair or replace bath fan?


Ok so now I know it's a NuTone model 8662.
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Old 08-22-2018, 09:49 AM   #9
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Re: Repair or replace bath fan?


The pieces look like this:
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Old 08-22-2018, 09:49 AM   #10
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Re: Repair or replace bath fan?


This is the motor:
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Old 08-22-2018, 09:51 AM   #11
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Re: Repair or replace bath fan?


Here's the motor and mount:
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Old 08-22-2018, 09:55 AM   #12
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Re: Repair or replace bath fan?


So I tried spray injecting some silicon spray lube into the upper bearing that's inside the squirrel cage.
Not.
Now it sounds worse!
Funny that I could spin the squirrel cage by hand and it was smooth and quiet, relatively speaking.
Oh well. I did measure the ceiling hole, 11 1/4" in diameter.
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Old 08-22-2018, 09:56 AM   #13
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Re: Repair or replace bath fan?


So it's off to the box store (I prefer Lowe's) for replacements.
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Old 08-22-2018, 10:02 AM   #14
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Re: Repair or replace bath fan?


silicon spray lube is not oil. bearings need OIL! 0W-xx motor oil seems to work well for most small motors.

spinning by hand doesn't move the rotor like turning it on does - often there's shaft play that is taken up when the magnets are powered.
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Old 08-22-2018, 10:13 AM   #15
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Re: Repair or replace bath fan?


If you decide to replace just the motor I’ll see if I can come up with something. I don’t think you can buy that motor from anytime any more. But pretty sure we’ve used a fasco replacement. Might be a few days before I get to shop


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