Re: [PSUBS-MAILIST] Pressure Compensated Trolling Motor Question

[Coalbunny <coalbunny@vcn.com>]

Another option is to get a brushless motor.  No graphite brushes, no
carbon residue, no problem.  Not sure of the life expectancy of these
motors in comparison to brush motors, though.
Carl


Michael Wright wrote:
> 
> Hi Everyone,
> 
> I have a question for anyone using Liquid Compensated Trolling motors.
> 
> I've heard that the drawback to them is that the carbon dust from the
> brushes goes into suspension and eventualy causes a ground fault to the
> case (or direct short if no ground fault detection is used).  This seems
> quite plausible with the simple solution being to change the
> compensating fluid regularly.
> 
> The quesitons I have are: Is this a problem worth solving in a better
> way?  Is the particle size large enough for an automotovie oil filter to
> catch them?
> 
> The trick I think is to use a drill powered oil change pump to circulate
> the compensating fluid through the filter.  Since the pump has no motor
> and no air spaces it is pressure compensated by the thruster fluid.
> Cycling the full volume of oil through the filter would take less than a
> minute and could be done with a cordless drill (safe and expendable).
> Since the compensating system stays closed there is no mess and no need
> to bleed the air out of the system.
> 
> So that's the idea.
> 
> mike

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