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 Posted: Tue Aug 1st, 2017 08:10 pm
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Dylan Sailors
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Any ideas on why my fan is seizing i used to run it every night and im noticing after i run it for a few hours it slows down. Any ideas why? Shims? Maybe needs a new seal on rotor and is leaking oil?  And the motor looks fine and the fan runs good for about two hours. Any help will be appreciated

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 Posted: Wed Aug 2nd, 2017 01:18 am
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Levi Mevis
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Well first of all, one thing I see that doesn't belong on that fan stator is a zip-tie, with as warm as these fans get (upwards of 130 degrees farenheit) it can melt that zip-tie and the melted zip-tie can cause the stator to short out.Anyways probably what your problem is, is that you may have too many spacer washers on the front or back of your rotor which once the fan gets up to ambient temperature it causes the rotor to expand which may be in turn causing your rotor to "seize up".

Just my 2 cents worth. 

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 Posted: Wed Aug 2nd, 2017 01:27 am
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Andrew Block
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Spins freely? Likely the capacitor then.

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 Posted: Wed Aug 2nd, 2017 01:33 am
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Levi Mevis
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Andrew Block wrote: Spins freely? Likely the capacitor then.That too.
As far as my Emerson 77648 Fan goes Mr. Tedrick has my fan and was taking a look at it for me to see why my fan didn't seem to have any discernable differences between the 3 speeds. According to Mr. Tedrick, he said that my Emmy is running like its supposed to but apparently the blades on my Emmy have absolutely no pitch to them whatsoever so because of that there's no discernable difference between Low, Medium and High Speeds, but the speeds are there apparently, just not as easily noticed as it is on some fans.
Which apparently according to Mr. Tedrick, he said that he thinks that the reason why the blades have no pitch to them anymore is because possibly the original owner of the fan wanted the fan to run so that it didn't make much white noise when it ran, so they bent the blades so that there was no pitch to the blades anymore, and he said that it would of been too much work to try and get the original blade pitch back on the blades so the fan will just have to run without pitched blades, unless someone on here has some donor blades they could donate to the cause.

Last edited on Wed Aug 2nd, 2017 01:38 am by Levi Mevis

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 Posted: Wed Aug 2nd, 2017 03:09 am
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Andrew Block
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What model is it? Pic?

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 Posted: Wed Aug 2nd, 2017 03:44 am
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Levi Mevis
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Are  you  referring  to  my  previous  post  where  I  mentioned  my  Emerson  fan? The  model  of  my Emerson  is  mentioned  in  the  post. Its  a 77648. As  for  a  picture  I  have  a  picture  of  it  posted  in  another  thread  on  here  in  the  Pre-1950 forum.

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 Posted: Wed Aug 2nd, 2017 08:28 pm
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NM Whitney Jr.
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I think if it were leaking oil to the point it was dry then seizing, you'd at least have oil splatter all over the blades, base, ceiling, counter it's sitting on, etc...

IIRC, the Emerson single bearing is ever so slightly larger at the back, than the front (try putting the rotor on backwards and you'll see). If you don't have any (or enough) fiber washers behind the rotor, it might be sliding back too far, then heating up enough to jam.

The single bearing also has holes (oil ports) on the top and bottom... make sure these are clean and not blocked.

Hope that's helpful...

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 Posted: Thu Aug 3rd, 2017 12:19 am
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Kevin Massey
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I would replace the capacitor. I've done it on most of my Emerson fans. You don't want to touch that nasty stuff that can leak out. My 77648 was speeding up and slowing down. Capacitor fixed that problem.

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 Posted: Thu Aug 3rd, 2017 02:14 am
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Dylan Sailors
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Its a shaded pole and thank you for the ideas when my new washers come in ill test some of the ideas and my oil ports are clean

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 Posted: Sat Aug 5th, 2017 01:01 pm
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Kevin Massey
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If it's a 16" fan it should have a capacitor in the base. 79 series 12" fans are shaded pole. Three head wires will also tell you it has a capacitor. Good luck.

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