RE: (ET) Need diagnositic help on E12

["Markus Lorch" <mlorch vt edu>]

good point, I just replaced mine for the same reason. 
I got the $6 one from surplussales.com, works fine. 
http://www.elec-trak.com/forum/showthread.php?t=76

When you tighten it make sure you don't overtighten
and kill the thread (I did that) or crack the bakelite
case (I did that as well) ...

Markus

> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu 
> [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of steveS
> Sent: Tuesday, March 15, 2005 7:46 PM
> To: et
> Subject: Re: (ET) Need diagnositic help on E12
> 
> 
> Check that the circuit breaker on the motor has continuity. I 
> have seen 
> two that open circuited because the screw adjsument had corroded away.
> 
> - Steve
> 
> 
> 
> >     *From:* Richard "Zack" Zachary <mailto:njcfsa earthlink net>
> >     *To:* Elec-trak list <mailto:elec-trak cosmos phy tufts edu>
> >     *Sent:* Tuesday, March 15, 2005 12:51 PM
> >     *Subject:* (ET) Need diagnositic help on E12
> >
> >     Hi Guys,
> >     <>E-12 went dead again after going only 15 feet in the last
> >     snowfall.  Snowthrower still works but no forward or reverse on
> >     the tractor.
> >     This is what has been checked so far:
> >
> >     Both relays close when the key and seat switch are 
> closed (Normal
> >     operating Condition NOC).  Between the two contacts on top of
> >     each, 1RTN had 41.0v and 2RTN had 40.9v. They both stayed closed
> >     in both Forward and Reverse.
> >     Then checked between wires # 11 and #14 and got 39.7v 
> in Forward.
> >     Then checked between wires # 11 and #41 and got 39.7v 
> in Reverse.
> >     Then checked between wires #8 and #24 and got 39.7 in 
> both Forward
> >     and Reverse.
> >     This tractor has had some uneven power in both Forward 
> and Reverse
> >     since I bought it 2 years ago . That is, the power felt a bit
> >     uneven and the power needle would sway a little back and forth. 
> >     It did stop dead another time when the insulation on one of the
> >     wires from the Varistor got stripped accidentally (when I was
> >     reinstalling the speed control) and this wire probably touched
> >     something else.  Have covered the badly insulated spot.
> >
> >     Tested between wires #8 and #7 and got 38.9v in Forward 
> and 38.7v
> >     in Reverse.   Got similar results between #8 and #6.  
> That is 39.7
> >     in Forward and 38.6 in Reverse.
> >     Pulled up the cover over the battery charger and inspected the
> >     heavy ribbon resistors.  They looked fine front and back and so
> >     did all the connections.  I remember that they heated up like a
> >     toaster back when I had the Varistor problem but they 
> look fine now.
> >     Then checked the main connection posts on the motor and they
> >     seemed fine. 
> >
> >     <>Got 39.3v across the large connection posts in both in Forward
> >     and Reverse and.  Had this motor rebuilt with new bearings and
> >     brushes less than a year ago.  Would hope it is still good.
> >     Rotated the motor by hand but no action.  Found wire #22 on the
> >     seat switch and wire# 62 on the Varistor assembly.  There are
> >     38.6v between them in Forward. 
> >
> >     As to current, there is some slight current usage but 
> nothing like
> >     when the toaster was happening. 
> >     I am just guessing but could I have burned something 
> out or have a
> >     bad connection somewhere on the Varistor assembly, a diode or
> >     resistor or something like that??? 
> >
> >     Would appreciate any knowledge you can share,
> >     Thanks,
> >     Richard "Zack" Zachary
> >     E12  model 26AE12CA serial # FP22038
> >
> >     
> --------------------------------------------------------------
> ----------
> >     _______________________________________________
> >     Elec-trak mailing list
> >     Elec-trak cosmos phy tufts edu
> >     https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> >
> >-------------------------------------------------------------
> -----------
> >
> >_______________________________________________
> >Elec-trak mailing list
> >Elec-trak cosmos phy tufts edu
> >https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> >  
> >
> 
> 
> 
> _______________________________________________
> Elec-trak mailing list
> Elec-trak cosmos phy tufts edu
> https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
>