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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