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Discussion Starter #1
When I got back from our 4 month tour I went around charging and
checking batteries . Audrey's Rav 4 ,probably the most used EV has a 8
inch AD motor. When I started it up and spun the motor It did a funny
oscillation kind of like I was pumping the peddle . I looked at the
motor and saw more sparks than I though normal coming from the
brushes. I popped the guard and moved the spring over to see that the
brush would move , it didn't . So I took off the bell and found that
most of the brushes where locked in their holders . I had to push very
hard to get them out . Once out with a little sanding they slid fine
in the holders , and the car works fine now . In Florida the humidity
is very high and I think it must react with the brush dust , First
time this happened to me I didn't know it and ruined a nice 9" motor.
Is there a spray that could be sprayed on the brushes to loosen them
up without taking everything apart?
Steve Clunn


--
Tomorrows Ride TODAY !
Visit our shop web page at: www.Greenshedconversions.com

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Discussion Starter #2
Hello Steve,

Go to a motor shop and see what type of motor cleaning compound they have.
I am using Chemtronics products that I got from my motor shop. There is a
motor spray wash and then you apply a motor dielectric spray and finally a
dielectric oil which may be needed if the washing removes the oil from the
bearings.

You can actually spray the motor while its turning. If you have the motor
out for maintenance, the motor shop immerses in a tank of this cleaning
solution while running the motor before doing any other work to the motor.

You can also get motor cleaning spray compounds from NAPA which is use to
clean the engine starters.

Roland


----- Original Message -----
From: "Steve Clunn" <[email protected]>
To: <[email protected]>
Sent: Friday, November 19, 2010 6:19 AM
Subject: [EVDL] brushes in motors that have sat for long time


> When I got back from our 4 month tour I went around charging and
> checking batteries . Audrey's Rav 4 ,probably the most used EV has a 8
> inch AD motor. When I started it up and spun the motor It did a funny
> oscillation kind of like I was pumping the peddle . I looked at the
> motor and saw more sparks than I though normal coming from the
> brushes. I popped the guard and moved the spring over to see that the
> brush would move , it didn't . So I took off the bell and found that
> most of the brushes where locked in their holders . I had to push very
> hard to get them out . Once out with a little sanding they slid fine
> in the holders , and the car works fine now . In Florida the humidity
> is very high and I think it must react with the brush dust , First
> time this happened to me I didn't know it and ruined a nice 9" motor.
> Is there a spray that could be sprayed on the brushes to loosen them
> up without taking everything apart?
> Steve Clunn
>
>
> --
> Tomorrows Ride TODAY !
> Visit our shop web page at: www.Greenshedconversions.com
>
> _______________________________________________
> | REPLYING: address your message to [email protected]du only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>

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Discussion Starter #3
If there was sparking, hopefully no damage occurred to the armature. It might
need cleaning, and the mica cut.
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View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/brushes-in-motors-that-have-sat-for-long-time-tp3050391p3051101.html
Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com.

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Discussion Starter #4
From: Jeff Major
> Where I have seen stuck brushes is in used motors which have a lot of crap inside them.

very likely , I should blow out the dust once in a while


>Are the holders themselves corroding? Perhaps you are leaving a path to the battery connected to the motor and there is some type of electrolytic or galvanic corrosion developed on the metal brush holder. ???? Just a guess.

Yes , and it was white es looking ,

from: "Roland Wiench


>Go to a motor shop and see what type of motor cleaning compound they have.
I am using Chemtronics products that I got from my motor shop.

Sounds like a good idea to do every once in a while .
Steve Clunn



--
Tomorrows Ride TODAY !
Visit our shop web page at: www.Greenshedconversions.com

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Discussion Starter #5
Steve,
Hi, welcome back to the "Sunshine State" to both of you, I might suspect
the vibration of the motor commutator segments moving the brushes slightly
helps keep the brush guides cleared out as the motor is used, but not when
parked for several months. A great source of phosphor-bronze brushes is the
Gun shop the barrel cleaning brushes come in sizes for every caliber in
fractional inches or MM dimension and with handles and extensions of inches
to feet that all screw together nicely, I even used to use them to clean
"Phone Jacks " in the Audio studio equipment. Get the right size and "Scrub"
that brush channel in the guide to a shine in a few strokes.
Regards, Dennis Miles

Steve Clunn <[email protected]> wrote:

> From: Jeff Major
> > Where I have seen stuck brushes is in used motors which have a lot of
> crap inside them.
>
> very likely , I should blow out the dust once in a while
>
>
> >Are the holders themselves corroding? Perhaps you are leaving a path to
> the battery connected to the motor and there is some type of electrolytic or
> galvanic corrosion developed on the metal brush holder. ???? Just a guess.
>
> Yes , and it was white es looking ,
>
> from: "Roland Wiench
>
>
> >Go to a motor shop and see what type of motor cleaning compound they have.
> I am using Chemtronics products that I got from my motor shop.
>
> Sounds like a good idea to do every once in a while .
> Steve Clunn
>
>
>
> --
> Tomorrows Ride TODAY !
> Visit our shop web page at: www.Greenshedconversions.com
>
> _______________________________________________
> | REPLYING: address your message to [email protected] only.
> | Multiple-address or CCed messages may be rejected.
> | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
> | OTHER HELP: http://evdl.org/help/
> | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>



--
Regards,
*Dennis Lee Miles* (Director) *E.V.T.I. inc*.
*www.E-V-T-I-Inc.COM <http://www.e-v-t-i-inc.com/> *(Adviser)*
EVTI-EVAEducation Chapter
*
Phone (813) ID4 - E V T I or (813) 434 - 3884
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