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Re: (ET) Another mower motor blows.
Magnet polarity matters very much. I glued one in wrong once.
Sent from my T-Mobile 4G LTE device
------ Original message------From: Chris ZachDate: Wed, Jun 13, 2018 6:20
PMTo: elec-trak cosmos phy tufts edu;Cc: Subject:Re: (ET) Another mower
motor blows.
Not sure. I've had my E20 for about 20 years now, so I have gone through a
lot of parts simply by attrition. That said I'll look through my box of
garbage and see what I have. I think I have at least 3-4 tall motors with
burned armatures and 2-3 fat ones with disconnected magnets.I'll clean and
sand that fat motor this weekend and use JB Weld plus some spreaders to
hold the new magnet. Does the orientation of the magnet matter?And I
ordered a new motor to have a spare. Robert I can take the deck of yours,
but I can't take the whole tractor. If Harold doesn't want it I can come
down weekend after this one, pick up the deck, take the drive motor off
it, and help drag it onto your trailer for the dump. Sad, but I don't have
enough space and/or batteries. :-)COn 6/13/2018 12:54 PM, Dean Stuckmann
wrote:> Maybe I’m just lucky but I’ve been mowing a bit over an acre a
week > since 1980 between (3) thin motor decks. As far as I can recall, I
only > had one motor fail due to bent armature (big rock) and one that
shorted. > Replace bearings between 5-10 years as needed. Brushes were
never an issue.> > I wonder why the huge variations from other users?> >
Regards,> > Dean A. Stuckmann> 5432 County Road U> Newton, WI 53063> > > >
>> On Jun 12, 2018, at 9:06 PM, John Jeno > > wrote:>>>> I've been looking
at replacement deck motors.>> I have used the Black and Decker 36v drives
and they are still running >> (2yr - 1acre).>> Another deck has tall
motors and the terminal insulation is failing. >> I could switch a couple
out with HD fat drives but would like to try >> newer drives.>>>> It seems
the TORO 20" model #20360 uses the Ametek CPM-160. About >> 970watts.>>
Motor + Fan + base+ blade,washer,nut = $245.87 from E Replacement.>>>> The
Neuton CE6 motor setup, Motor + Fan + base+ blade,washer,nut = >>
$138.54.>>>> Anybody have any experience with these mowers?>>>>>>
------------------------------------------------------------------------>>
*From:*Rod Hower >>> *Sent:*Tuesday, June 12, 2018 7:45 PM>> *To:*Charlie;
Christopher Zach; Elec-Trak>> *Subject:*Re: (ET) Another mower motor
blows.>> I'll check with the guys at work, Ametek-Rotron Lamb electric,
build >> thousands of PM motors, many of which are used as starters and
sit >> beside the engine. I'm sure those guys have some pretty good ideas
on >> which glues hold PM's in >>
place.http://www.ametekdfs.com/dfsbrands/drivemotors/pmdc-motors >> >>>>>>
On Tuesday, June 12, 2018 7:57 PM, Charlie > > wrote:>>>>>> Steve Naugler
figured out how to reglue the magnets, I think. >> Somebody did, anyway,
you should be able to find it in the mailing >> list archives.>>>>
--Charlie>>>> On Tue, Jun 12, 2018, 7:22 PM Chris Zach > > wrote:>>>>
Well, had the usual deck motor failure. This seems to happen every>>
other>> year or so with tall thin motors:>>>> Mows fine one
weekend.>> Start mower next weekend, tractor pulls huge amount of
current.>> Blade is>> stopped.>>>> Blade free-wheels, wiring
to motor is smoked.>>>> Take motor top off, commutator is burned, and
armature is obviously>> shorted. Motor destroyed.>>>> Any idea why
this happens? The inside of the motor was dry, no>> problems,>>
plenty of brush. It's as if the laminates just decide to fail and burn>>
everything up.>>>> Now to buy some more motors, my supply is low.
This never happens>> to fat>> motors, they just have the magnets
deglue and shatter all along the>> inside. Once again no reason, is
there a glue that will hold them?>>>> C>>>>
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