[ausev] 8" ADC motor

[Christopher Robison]

Do you have pictures of the damage?

Though catastrophic bearing failures on EV motors are probably not
unheard of, this would be the first time I can recall ever seeing the
topic discussed.  I wonder what warning signs could be considered, to
prevent this from happening in the future? 

And I wonder how many miles those bearings had on them...

  --chris



On Thu, 2007-05-10 at 13:14 -0500, Roy Holder wrote:
> At 11:40 PM 5/9/2007 -0500, you wrote:
> >Hi Roy,
> >
> >Out of curiosity do you know what's wrong?
> 
> The front bearing failed on 183 wed.  I was coasting at about 25 when the
> motor locked up.   I can see the alum. 'fan' in the cooling vents near the
> trans is not straight, but ragher leaning to 1 side.  I took the brush
> cover off and found 2 loose pcs of bent, torn copper(about 3.8" wide, about
> 1/8 thick and 1 to 1.5" long, bent into a c shape).  The comm does not look
> damaged, and I touched the motor just after it stopped and it was not hot.
> Im afraid it will not be repairable.
> I called a place in Dallas but the shipping on an iffy repair on top of
> replacement is what Im trying to avoid.
> 
> I'll try to remove the motor this weekend and it its not too torn up i'll
> talk to the in town guys.
> 
> thanks for the info.
> 
> >
> >I took my motor to Tomecek Electric Motor Repair in Taylor. Dropping
> >it off was a little disconcerting, as I was told to I placed it on the
> >ground near a whole bunch of other motors to be worked on, described
> >what I wanted done and was on my way. I got a call in about 10 days
> >and they said it was ready.
> >
> >They had relaquered all of the windings, turned and grooved the comm,
> >cleaned a far too conductive brush holder, generally cleaned the
> >inside and given the outside a fresh coat of paint. That being said,
> >all I really asked for was to turn and groove the comm, but they found
> >the brush holder failing the insulation test. It ended up being a few
> >dollars more than I thought (250-350 I think), but the guys working on
> >the motors really knew their stuff and honestly everything they did is
> >something that should've been done. I'd say they're generally a good
> >place to take a motor.
> >
> >What is neat about this, is this motor has been through at least five
> >or six years of service and the top to bottom tune up is around $300.
> >This probably wouldn't have even been needed, save cleaning the brush
> >holder, if I hadn't tried to "smooth" the comm myself and end up
> >royally messing it up.
> >
> >The other place I called is Hamilton Electric on Airport. Don't know
> >much about them.
> >
> >Oh and if you don't want your motor to end up industrial gray, I'd
> >make it VERY clear :)
> >
> >Erik
> >
> >On 5/9/07, Aaron Choate <achoate at gmail.com> wrote:
> >> There's an electric motor rebuild company over by me on Airport.
> >>
> >> http://www.hamilton-electric.com/
> >>
> >> I have never dealt with them, but they have been in business for a while
> >> from the looks of the paint and such on the building...
> >>
> >> I think Erik found somebody out of town somewhere as well that he ended up
> >> going with for the work he had done on the Cabriolet..
> >>
> >> Cheers,
> >>
> >> Aaron Choate
> >>
> >>
> >> On 5/9/07, Roy Holder <roy at holder3.com> wrote:
> >> > Anybody know where to get the CD motor repaired locally?
> >> >
> >> >
> >> >
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