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AFCA Forums > Antique Fan Collectors Association > Pre-1950 (Antique) > Menomonee 129 universal motor humming

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Menomonee 129 universal motor humming  Rate Topic 
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 Posted: Tue Jun 30th, 2020 11:56 pm
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Jarrod Martis
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Joined: Sun Mar 13th, 2016
Location: Peoria, Illinois USA
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I am not very familiar with the brushed motors. I bought this fan last year at fan fair, and did not run it much. I believe it is restored, including electrically. It locked up this spring and now just hums when plugged in. It can be spun, and spins briefly under power before locking again. I currently have the switch  and resistive coil jumped out for troubleshooting. I believe it is electrically the same as a staghorn. 

I checked the brushes, they appear correct and touching the rotor correctly. The bearings are correct and oiled. The front/rear spacing appears correct, as the brushes are centered on the rotor contact surface. 


Any tips to look for would be appreciated as I dont have many brushed fans I have worked on.  

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 Posted: Wed Jul 1st, 2020 12:31 am
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Sean Campbell
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It would be helpful to see some pictures. Have you checked the gearbox or put in fresh grease? 

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 Posted: Wed Jul 1st, 2020 12:58 am
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Jarrod Martis
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Gearbox is good, with fresh grease. It is electrically locking up I believe. I've never had a damaged rotor, but that may be the cause.

Attached is a picture, let me know if something specific may help picture wise. 

Attached Image (viewed 92 times):

20200630_195544.jpg

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 Posted: Thu Jul 2nd, 2020 01:20 am
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Mark Behrend
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I do not have this fan but could it be a spacing issue between the stator and rotor

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 Posted: Thu Jul 2nd, 2020 01:21 am
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Mark Behrend
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Could you run a feeler gauge between both part and see if they match.  

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 Posted: Thu Jul 2nd, 2020 01:35 am
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Jarrod Martis
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I can try that, but it just up and happened and always ran well before. 
I believe the rear worm gear to drive the oscillating gear box removes with an allen key set screw? It's very small, I'll need to bring home my little set and try. 

Does anyone know if the front bearings on these or staghorns is loose in the cast, or is it a press fit to the housing?

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