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AFCA Forums > Antique Fan Collectors Association > Pre-1950 (Antique) > Proper Head wire resistance for RandB 1159 motor ?

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Proper Head wire resistance for RandB 1159 motor ?  Rate Topic 
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 Posted: Thu Sep 13th, 2018 09:22 pm
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Joel Schmid
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hello all,Trying to troubleshoot our Robbins Myers 1159 fan.
The head wires measure the following resistances :
Blk to blk/red = 10.8 ohms
Blk to blk/orange = 10.8
Blk/red to blk/orange = 7 ohms.
Head wires disconnected from base and speed coil when measured.

Are these readings close ?
I have purchased another fan for parts.
I plan on building one working fan from parts of each.
Donor fan was painted ugly black all over.
Original fan has nice paint and lovely polished brass blades.

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 Posted: Fri Sep 14th, 2018 03:54 pm
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Jim Humphrey
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I don't have an 1159, but for an 1153 I show 22.8, 23.4, and 25.5.  For an 11530 I show 24.6, 26.4, and 28.8.  Those numbers aren't necessarily in the same sequence of pairs of wires you listed, since the wires on my fans may not have been visibly coded, and they're for 12" fans.  Don't know how the 12" and 16" may have varied, but perhaps someone else may have numbers for the 16"s.  Hope this helps a little.

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 Posted: Mon Oct 8th, 2018 04:54 am
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Joel Schmid
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Hey all, Was able to verify the correct resistance for the field coil in motor for a R amd M model 1159 is as follows :

Black to black/red = 24 ohms
Black to black/orange = 24 ohms
black/red to black orange = 20 ohms.

I resurrected our 1159 by removing the field coil from the motor casing, where I found two spots on the winding that had arced to the case. I was able to tease the arcing wire away from the winding to clean it and apply clear nail polish over the bare wires.
Reassembled and WA LA !
Motor now runs correctly on all three speeds.
Also soldered all new leads on the speed coil, speed switch, and the big ring coil in the base which I assume is the boost coil for starting ? Not sure what purpose of the big ring coil is. If anyone knows I would love to hear it !
Fan blades a little bent so used a marker to just tick the out of line blade with a mark as it spun on low speed. Bent the hub spider for that blade a touch to bring it into line.
Fan now runs great.


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