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Emerson B Jr wiring  Rate Topic 
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 Posted: Tue Feb 5th, 2019 01:08 am
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Mark McCormick
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Emerson Jr wiring question.   I am putting the fan back together and want to make sure I wire it correctly.  Do all terminations happen at the on-off switch?  Is there a simple wiring diagram? I don’t have a good photo of the original wiring!  Ugh!  Any insights would be appreciated.

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 Posted: Tue Feb 5th, 2019 02:03 am
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Chris A. Campbell
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http://www.afcaforum.com/forum1/53944.html

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 Posted: Tue Feb 5th, 2019 09:53 am
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Lane Shirey
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Neutral from power cord ( the ribbed one, large plug blade) connects to either headwire.  The hot from the power cord ( smooth one, narrow plug prong) connects to the switch, then the other switch terminal connects to the remaining headwire.  Presto, done. 

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 Posted: Tue Feb 5th, 2019 11:00 am
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Mark McCormick
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Chris A. Campbell wrote: http://www.afcaforum.com/forum1/53944.html
Thanks Chris!   Great info 

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 Posted: Tue Feb 5th, 2019 11:02 am
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Mark McCormick
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Lane Shirey wrote: Neutral from power cord ( the ribbed one, large plug blade) connects to either headwire.  The hot from the power cord ( smooth one, narrow plug prong) connects to the switch, then the other switch terminal connects to the remaining headwire.  Presto, done. 
Lane - your info combined with Chris’s link are all that I need.  Thanks!

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 Posted: Tue Feb 5th, 2019 11:54 am
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Chris A. Campbell
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Mark McCormick wrote: Chris A. Campbell wrote: http://www.afcaforum.com/forum1/53944.html
Thanks Chris!   Great info 


Sometimes getting the front cover back on without the bearing getting binded can be tricky. If you find yourself in that situation shoot me a pm or feel free to call/text.

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 Posted: Wed Feb 6th, 2019 03:47 am
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Mark McCormick
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Will do!

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 Posted: Sun Feb 10th, 2019 04:29 am
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Mark McCormick
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Looking for forum feedback.  Just put my Emerson Junior together.  Installed new fiber washers - same number of washers as original.  Rotor spins nicely.  There is some horizontal play (axially). How much is a acceptable - none?  Some?  Please take a look at the video links.  Would appreciate any feedback.  Thanks!!

https://youtu.be/Y3BxwyqsJcU 

https://youtu.be/_i-Ey9Kv-fc

Last edited on Sun Feb 10th, 2019 04:31 am by Mark McCormick

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 Posted: Sun Feb 10th, 2019 10:31 am
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Lane Shirey
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Mark, to me it looks like it could use one more washer. Keep in mind that it’s important that the rotor be centered in the stator when the rotor is pushed all the way toward the back of the fan.  You may need to use a flashlight to peek through the vent holes. You want to push it to the back of the fan before comparing the centering because the wind pressure of the blade pushes it back during operation, so that’s it’s normal running position. 

The centering of the rotor will tell you whether to add the extra washer to the front or rear of the rotor. McMaster also has grey washers that are half the thickness. 


Ideally 1/16” or less is optimal. Too little end play and you risk jamming the rotor when the motor warms up.  Too much, and the oscillator action will be sloppy. Also be sure to tighten the screws that hold the motor together before taking your reference.  Often that makes a 32nd or more difference. 

Last edited on Sun Feb 10th, 2019 10:32 am by Lane Shirey

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 Posted: Sun Feb 10th, 2019 09:21 pm
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Mark McCormick
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Chris - I am making good progress with reassembly. No issues with bearing/stator/rotor alignment.  But I’m stuck trying to remember the order of the four bolts (each with two washers and a brass nut.  See pic 


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 Posted: Sun Feb 10th, 2019 11:51 pm
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Vic Valencheck
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Mark, I have the same fan. I was wondering why you didn't paint the fan before putting it back together?

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 Posted: Mon Feb 11th, 2019 02:59 am
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Chris A. Campbell
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Mark McCormick wrote: Chris - I am making good progress with reassembly. No issues with bearing/stator/rotor alignment.  But I’m stuck trying to remember the order of the four bolts (each with two washers and a brass nut.  See pic  Shorter threaded end goes into rear of housing with washer under the shoulder on bolt. The washer will then compress against face of stator.  Nut will go on exterior of front motor cover over longer threaded end topped with acorn nut


Last edited on Mon Feb 11th, 2019 03:02 am by Chris A. Campbell

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 Posted: Mon Feb 11th, 2019 11:45 am
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Mark McCormick
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That makes sense so far.  Did what you suggested and seems to fit nicely.  Follow-up:
1.  Where does the second washer go?  I assumed it went under the outside nut used to hold the front cover on

2.  Put front cover back on and tightened.  Virtually zero axial shaft movement.  Ran fairly quietly but got very warm after a few minutes of running.  Almost too hot to hold.  That doesn’t seem right.  Recommendations to check?

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 Posted: Mon Feb 11th, 2019 12:45 pm
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Chris A. Campbell
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Yes, 2nd washer under the nut

These do run pretty warm but check your amp draw with a killawatt too see if higigh amp draw is going on

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