Re: (ET) tractor parts

["Bob Murcek" <rmurcek geisinger edu>]

I'm not familiar with the E20, but in the smaller tractors the armature 
series resistors are just for getting going, right?  I.e., you should set 
the gear so that you can run the motor full on.

>>> "RJ Kanary" <rjkanary nauticom net> 9/12/2004 5:29:30 PM >>>
        Nothing terrible , IF YOU ARE CAREFUL .  That is the configuration 
that my CA model E-20 has been living with for fifteen or so years now.
        BUT........all the current limiting features that the Elec-Trak 
engineers provided will now be null and void .Without the control card 
functioning, you will be able to access field weakening at a much higher 
motor load , {and therefore lower armature RPM.} than the design had 
anticipated .
       If you are not alert , you can make  big , expensive smoke . The 
only 
protection you will have against meltdown are the large Klixon® limiter on 
the motor housing, and the thermal switch in the field windings. Should 
you 
mash the throttle too quickly, or hold it past the fourth speed position 
to 
far for too long, you WILL overtemp the armature, possibly faster that the 
Klixon® can react, especially at the beginning of a snow throwing 
expedition 
.
      The symptoms you are describing seem to point to deeper issues . You 
would do well to fully assess all the components that are behaving badly. 
It 
will be cheaper in the long run , and will preserve many difficult to 
replace parts .

----- Original Message ----- 
From: "Chris Zach" <czach computer org>
To: "Elec-trak list" <elec-trak cosmos phy tufts edu>
Sent: Sunday, September 12, 2004 5:07 PM
Subject: (ET) tractor parts


> Well, today I was driving my E20 around on the street and managed to 
> trip 
> the motor temp breaker. Or something; the tractor stopped dead and 
> didn't 
> move for about 5 minutes.
>
> I noticed that my disconnect is getting rather hot on one of it's 
> connections; think I will replace it with the evparts.com one. Also 
> getting a new volt meter (the two I bought from Ebay were *BOTH* bad) 
> and 
> a single contactor since one of mine (3A, the top resostor bypass) was 
> getting hot as well.
>
> Still, nothing compares to that shunt plate in the center. It is 
> extremely 
> hot after running the motor hard; what kind of bad things might happen 
> if 
> I just jumped around it with some 2/0 cable?
>
> Reason I am concerned about power is that winter's coming. Winter means 
> cold which means snowblower, which means I need *full* power in both 
> forward and reverse.
>
> Fun fun.
>
> Chris
>
>
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> 


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