Magnet polarity matters very much. I glued one in wrong once.
/Sent from my T-Mobile 4G LTE device/
------ Original message------
*From: *Chris Zach
*Date: *Wed, Jun 13, 2018 6:20 PM
*To: *elec-trak cosmos phy tufts edu
<mailto: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.ht
<http://place.ht>tp://www.ametekdfs.com/dfsbrands/drivemotors/pmdc-motors <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>>>> _______________________________________________>> Elec-trak
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