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 Posted: Thu Jul 18th, 2019 09:03 pm
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Richard Smith
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I am working on an Emerson 77648 AG. This is my second fan to refurbish, the first being a GE. I have learned a lot reading the archived forum threads here. After "testing" the GE in my shop for as long as I could before I had to send it back to its owner, I decided a fan made things much more comfortable. I remembered we had the old Emerson from my childhood, so I retrieved it from the attic. I checked the cord, plugged it in and it worked great. :clap: I ran it for a couple of hours :badidea and it began slowing down, then speeding back up as it oscillated and finally stopped. I figured one of the head wires was broken so I carefully untaped the old sticky stiff electrical tape and found not one but three broken wires. :cry:
Of course, I now have no idea which wire is which. I know where the three wires attach to the switch, just not which wire is which. They were probably different colors at one time. but are all oily black now.



Evidently, my father felt that if 6 drops of oil were good, 16 would be better. :D When I dismantled the fan every part was covered in oil. No rust anywhere, though, so I guess something good came out of it.


Now for my grovelling...if I post a drawing with ohm values between the three wires of the stator, can someone tell me where they go?


Since I have everything disassembled, I am going to change the capacitor as well. "Sparky" had said in an old post that a lower value capacitor worked better with our modern power supplies. I think he suggested 1.5mf instead of the sardine can 2mf.
Any help (and encouragement) would be welcome.




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 Posted: Thu Jul 18th, 2019 09:28 pm
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Andrew White
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This might help.
https://www.fancollectors.org/info/mccomas/Emer_77648sm.jpg

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 Posted: Thu Jul 18th, 2019 09:39 pm
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Richard Smith
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Thanks Andrew. Actually, I have that printed out on my desk.
Do you think my wires 1&3 correspond to A & B in the diagram?
This fan has too much history for me to risk frying the motor and that is why I am asking for other opinions.

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 Posted: Thu Jul 18th, 2019 09:56 pm
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Andrew White
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Based on the ohm readings you got C = 2, B = 3, A = 1. Measuring ohms between C and B (or 2 and 3 in your case) yields the sum of the two windings resistance. 
77648's came in a lot of different varieties, I don't think that every 77648 has the same resistance values. I have two, a 77648-TG and a 77648-AH, both of which measure a little differently. 

Last edited on Thu Jul 18th, 2019 10:00 pm by Andrew White

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 Posted: Fri Jul 19th, 2019 12:15 am
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Richard Smith
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Ahh, thank you so much! I am glad you and I agree. I will now proceed with my reassembly.
IF I can get the stator seated completely! Having a bit of a challenge.
I'll try not to be a pest on this forum, but you know how us newbies are.

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 Posted: Fri Jul 19th, 2019 01:01 am
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Andrew White
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Considering I’ve never removed a stator from any of my Emersons, you might actually be the expert here!:P

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 Posted: Fri Jul 19th, 2019 03:07 am
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Richard Smith
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Actually, it was very easy to remove and even easier to reinstall. The only problem I had was forgetting the four small nuts that hold the face plate on. I was looking at the acorn nuts that hold the cage and I kept thinking the bolts were sticking out too far. These golden years ain't so golden!
I'm on the east coast (SC), so I'll connect the capacitor and switch and test it in the morning.

Are your cages silver (aluminum)? I can't tell on mine and I can't remember from my childhood. I just remember how cool that breeze felt on hot summer nights and my mom telling us to keep our hands away from it because it would cut our fingers off!

It is amazing that these old fans are still working. I think that was the golden age of American manufacturing. I love restoring old tools from that era as well. Only recently has the fan bug bit me.

Again, thanks for your help Andrew.

Last edited on Fri Jul 19th, 2019 03:10 am by Richard Smith

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 Posted: Fri Jul 19th, 2019 04:03 am
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Andrew White
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My 77648 AH has a bare steel cage which — I think — is original. Someone may correct me. The blades are painted aluminum. And, like you said, the breeze off this thing is incredible!

I got the fan when I was 6 years old from a very kind lady at church. I love this fan very much. It looks similar to yours. Does yours have a bullet shaped cover on the back or does it have an exposed oscillator gearbox?











Last edited on Fri Jul 19th, 2019 04:22 am by Andrew White

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 Posted: Fri Jul 19th, 2019 09:59 pm
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Richard Smith
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I have never seen a pedestal one before. Very nice! I wish mine was a pedestal one now.
Mine has the open back. I called it the bulldog fan when I was little because we had a Boston Bulldog and the back of the fan reminded me of her face. According to what I have read mine was born in 1939. (Add 20 to the number beside the bottom right of the tag.)
Thirteen years older than me and still going strong! Well, if I can figure out the wiring it will be. I spent the morning measuring ohms, following the diagram and testing. Latest result is Off works but the other three speeds just hum. One out of four works, so it could be worse, I suppose...Spinning the blade didn't help but I have a new capacitor on the way.
This can't be this hard! I am sure it is something simple I am overlooking.

Here's my tag:



The oscillator is buggered up and the top of the oil fill is gone. Other than that, it is in good shape. I ordered reproduction wires and felt for the base.




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 Posted: Mon Aug 26th, 2019 03:19 am
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Richard Smith
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I just realized that I never posted an update. I finished the fan, thanks to Andrew White. Here's the final result.
I was very pleased with the result. I disassembled and cleaned all the parts, rewired the head wire, capacitor and power cord, painted the bottom third of the base and replaced the felt

I know it is not "original" but I felt the fan needed a little bit of sparkle, so I left the brass parts brass instead of repainting them black. I also added brass acorn nuts for the grill.


I love the detail on the acorns and oak leaves on the plug.



I wish I could find a better badge and a replacement oscillator. Mine is worn and only oscillates about half way.



I use the fan in my shop and have never used it above the lowest speed. These things move a LOT of air.

Again, special thanks to Andrew and to all the other posters who helped without knowing it.


Last edited on Mon Aug 26th, 2019 03:22 am by Richard Smith

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