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Ralph, This is a good question! I have had some
luck removing the mower thermo switches and placing them on a warming plate. I
use a volt ohm meter to see when they open. If you find one of the three that
takes a lot more heat to open you might try turning the adjustment screw to see
if you can get it to trip out at the same heat level as the other two. The Wife got a digital oven thermometer
for Christmas I plan on using it the next time I check the switches. In fact
she says I can use it on the Elec-Trak. I always wanted to know the case temp
of the drive motor. I over heated an E14 motor and burned out the windings because
the thermo switch contacts were rusted/welded closed. I bought a new E15 motor
from Bill to replace the PM motor that the E14 had. (Bill had a motor up-grade
kit for this!) The E15 drive motor has a large thermo switch bolted to it. The
switch has as an adjustment screw also. I used heat sink compound to help transfer
the motor case heat to the thermo switch. So, it's not easy to figure the exact
heat trip level needed to protect your motors but you want to know they WILL
open at some point! You never want to smell burnt wire like I did. Any one else have any experience
checking/setting these switches?
Dwight Dwight L. Hazen, Indiana
University, UITS Bloomington, In.
47408-7378 Phone 812-855-5367 http://php.ucs.indiana.edu/~hazen/ Ham Radio wb9tlh arrl net IP Phone
317.278.4014 Change is inevitable except from a vending
machine. -----Original Message----- How do I check the thermo switches on the motors? Dwight
L. Hazen said they should be checked and it sounds like a good idea since my ET
sat for the last 20 years. Ralph
Vogan Goodrich,
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