RE: Same failure on front lift RE: (ET) Klixon breaker failure mode onmower motors

["Elie, Larry \(L.D.\)" <lelie ford com>]

I had a different failure mode; the rivets came off!  The thermal breaker 
is supposed to be 
coupled by the metal bracket to the motor.  Nope.  It still tripped as the 
can makes a little 
oven, but probably at a much higher temperature than planned.

Larry Elie


-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu
[mailto:elec-trak-bounces cosmos phy tufts edu]On Behalf Of Markus Lorch
Sent: Friday, June 18, 2004 11:41 AM
To: 'Geoff Rich'
Cc: elec-trak cosmos phy tufts edu
Subject: Same failure on front lift RE: (ET) Klixon breaker failure mode
onmower motors



> More investigation turned up the fact that the little 25A 
> Klixon breakers on top of the motor caps were WELDED CLOSED!  
> So, under heavy loads, the motors would draw more and more 
> current, get hotter and hotter, and perhaps this eventually 
> burned out some of the varnish on the coils, leading to 
> shorts in the windings. 

I had the same problem with the breaker in the front lift motor,
it also was welded and my coils shorted, thus drawing excessive 
amperage and tripping the fuse (which had been replaced by a 
previous owner with a resetting circuit breaker)

Markus 


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