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Emerson 77648-AS  Rate Topic 
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 Posted: Thu Sep 20th, 2018 07:01 pm
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Sterlin Bryant
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Have question on wiring on Emerson 77648-AS. There are three wires on the stator white, green and black. I have a wiring diagram , but its labels as A, B and C.  Wires were cut and broke so not sure which is Which.  I have replaced the motor with new reproduction wiring and now ready to hook up capacitor coil.   Any help would be greatly appreciated.

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Sterlin     

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 Posted: Fri Sep 21st, 2018 12:21 am
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Kevin Massey
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Hi Sterlin: You'll have to use an ohm meter to figure out what wire to connect together. That's the best way. You could risk damage to the motor or speed coil with improper wiring.

Last edited on Fri Sep 21st, 2018 12:22 am by Kevin Massey

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 Posted: Fri Sep 21st, 2018 10:40 pm
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Sterlin Bryant
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Have measured stator with the following results.I use the following.

A/C  White / Green wires==175 ohms
A/B  White / Black wires==140 ohms
B/C Black / Green wires==35 ohms

Is this correct?

On my stator the wire lay out is White, Green and Black. 

Thanks 
Sterlin

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 Posted: Fri Sep 21st, 2018 11:07 pm
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Steve Sherwood
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I does not matter on the color of the wires. Use the ohm readings for the correct connections.

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 Posted: Sat Sep 22nd, 2018 03:24 pm
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John McComas
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Sterlin Bryant wrote: Have measured stator with the following results.I use the following.

A/C  White / Green wires==175 ohms
A/B  White / Black wires==140 ohms
B/C Black / Green wires==35 ohmsIs this correct?


That's correct.

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 Posted: Sat Sep 22nd, 2018 05:56 pm
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Sterlin Bryant
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It is alive and running well all three speeds, nice with all the new wiring..OK now next question is there a trick to getting the square shaft inside the fan blade square hole? Y'all have help a lot.


Thanks

Sterlin

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 Posted: Sat Sep 22nd, 2018 09:45 pm
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Allen Bennett
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Here's what I do:
Remove the top left screw of the oscillator gear box.  Insert a long 1/4-20 screw and tighten just enough to seat the screw against the rotor to keep it from turning.  Remove the screw on the bottom of the oscillator wheel.  Loosen, but don't remove, the other two screws of the gear box.  Slightly bump the gear box and it will break free from the back of the motor.  Screw the blade on CCW and as you do, you may feel a slight resistance when the square end of the rod fails to seat in the nose of the fan hub.  Gently pull the gear box rearward or rotate the oscillator wheel as you gently continue to tighten the blade.  You'll feel the resistance disappear when the rod seats in the square slot, allowing you to finish tightening the fan hub.


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 Posted: Thu Sep 27th, 2018 04:37 pm
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Sterlin Bryant
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Thanks for all the help.  Had to balance the blades a little, but it complete and running.



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 Posted: Thu Sep 27th, 2018 05:49 pm
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David Kilnapp
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Nice job! Beautiful fan!

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 Posted: Thu Sep 27th, 2018 07:57 pm
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Allen Bennett
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Glad you got it going.  I have five of the 77646-AS models and to be honest, they are the perfect Emerson fan for the home. They’re exceptionally quiet on low and provide the perfect amount of air movement.  

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