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 Posted: Mon Oct 19th, 2020 03:42 am
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Dennis Long
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My Emerson 77646-AS is making a very fast clicking noise while running.  I have removed the blades, front cover, and oscillator box to eliminate them from the possibilities.  I removed the rotor to make sure nothing was hanging in the space where it rotates, and saw nothing.  Stator has been vacuumed.  There are washers in front and rear of the rotor on the shaft.

Looks like I can't upload an mp4 video for you to hear the clicking.  I would be happy to send my 13-second mp4 to anyone willing to listen to the sound while watching the fan closeup with blades and faceplate removed.  Where can I get replacement fiber washers of the correct size?  None of the fiber washers in my assortment are the right size.  Here's hoping someone has an idea!  Thanks!

Last edited on Mon Oct 19th, 2020 04:09 am by Dennis Long

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 Posted: Tue Oct 20th, 2020 01:24 am
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Dennis Long
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Here's the picture I'm trying to reference.  Is there supposed to be one or two fiber washers forward of the rotor?  I only have one.



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 Posted: Tue Oct 20th, 2020 11:43 am
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Lane Shirey
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As far as the fiber washers. There is no hard and fast rule.  It’s whatever it takes to center the rotor in the stator front to rear. The rotor has to ride in the magnetic center of the stator.  Be sure to push the rotor as far to the rear of the fan as it will go before you check the centering, as that’s what the blade does when it’s running. 

Your noise could be the oscillator driveshaft. They sometimes make a clicking noise. 

Last edited on Tue Oct 20th, 2020 11:45 am by Lane Shirey

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 Posted: Thu Oct 22nd, 2020 04:20 am
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Dennis Long
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Lane, I really appreciate your input on fiber washers.  Makes sense.  I ordered several 14mm x 20mm washers which seem to be the size needed.  Hard for me to find - I had to order off eBay from the UK!  Once they arrive I'll be seeing what's needed to center the rotor in the stator back-to-front, as you say.  Also appreciate your point about pushing the rotor to the rear when fitting the washers.
The oscillator driveshaft is not contributing to my clicking, as I've already removed it as part of my troubleshooting.   :D

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 Posted: Thu Oct 22nd, 2020 07:32 pm
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Steven P Dempsey
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I knew that exploded photo would come in handy one day!!

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 Posted: Sat Oct 24th, 2020 10:15 am
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Lane Shirey
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Dennis Long wrote: Lane, I really appreciate your input on fiber washers.  Makes sense.  I ordered several 14mm x 20mm washers which seem to be the size needed.  Hard for me to find - I had to order off eBay from the UK!  Once they arrive I'll be seeing what's needed to center the rotor in the stator back-to-front, as you say.  Also appreciate your point about pushing the rotor to the rear when fitting the washers.
The oscillator driveshaft is not contributing to my clicking, as I've already removed it as part of my troubleshooting.   :D

Are you in the Uk?  If I recall correctly they should be 1/2” fiber washers. They’re definitely not metric. Mcmaster Carr has them.  

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 Posted: Sat Oct 24th, 2020 11:10 pm
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Dennis Long
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Lane Shirey wrote: Dennis Long wrote: Lane, I really appreciate your input on fiber washers.  Makes sense.  I ordered several 14mm x 20mm washers which seem to be the size needed.  Hard for me to find - I had to order off eBay from the UK!  Once they arrive I'll be seeing what's needed to center the rotor in the stator back-to-front, as you say.  Also appreciate your point about pushing the rotor to the rear when fitting the washers.
The oscillator driveshaft is not contributing to my clicking, as I've already removed it as part of my troubleshooting.   :D

Are you in the Uk?  If I recall correctly they should be 1/2” fiber washers. They’re definitely not metric. Mcmaster Carr has them.  

No, I'm in Texas.  1/2" looks good too, now that I measure it.  Both sets of fiber washers I have are metric, so I measured to the nearest mm.  Guess I need to get me an SAE set of fiber washers for next time.  Oh well.

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 Posted: Sat Oct 24th, 2020 11:37 pm
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Marce Clark
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Hey Dennis where in Texas are you?

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 Posted: Sun Oct 25th, 2020 02:57 pm
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John McComas
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A very handy tool for your toolbox is a tapered reamer.  Mine has a handle like a screw driver handle, but those are getting hard to find.  1/8" to 1/2"   They work great for opening holes in fiber washer, aluminum, sheet metal, wood,
plastic, Bakelite, etc.
https://www.harborfreight.com/t-handle-reamer-66936.html



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 Posted: Mon Oct 26th, 2020 03:42 am
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Dennis Long
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Marce Clark wrote: Hey Dennis where in Texas are you?

Hi Marce, I'm in Arlington.  Looks like you're down by San Antonio.  A little drive from me.   :D

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 Posted: Mon Oct 26th, 2020 03:47 am
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Dennis Long
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John McComas wrote: A very handy tool for your toolbox is a tapered reamer.  Mine has a handle like a screw driver handle, but those are getting hard to find.  1/8" to 1/2"   They work great for opening holes in fiber washer, aluminum, sheet metal, wood,
plastic, Bakelite, etc.
https://www.harborfreight.com/t-handle-reamer-66936.html



Thanks John!  I will definitely be getting one of those, especially at that price.  Thanks for the lead!

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 Posted: Mon Oct 26th, 2020 08:34 pm
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Marce Clark
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Cool I grew up in Grand Prairie. I've lived in the San Antonio Area now for 35 years now but I still have family up in the DFW area.

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