[ARC5] Re: [Milsurplus] Dynamotor brushes

[WA5CAB at cs.com]

Clare,

I could be wrong but I also am unaware (never heard of) any chemical 
differences between the + and - brushes.  I always assumed that they were marked that 
way as a maintenance aid.  So that the tech wouldn't have to worry about which 
holder each brush came out of when disassembling the dynamotor for service.  
Because it IS important to get used brushes back into the same hole they came 
out of.  Else you must repeat the seating procedure which wastes brush life.

In a message dated 3/30/2008 10:41:45 AM Central Standard Time, 
clare.owens at gmail.com writes: 
> Also this brings up the question:  Why are they so specific about the
> positive and negative polarities of the brushes?  They have different
> part numbers, there are plus and minus signs molded into the housings,
> etc.
> 
> What difference could polarity make in a graphite brush?
> 

Robert & Susan Downs - Houston
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