Re: (ET) Overheating Problem

[RJ Kanary <rjkanary nauticom net>]

      It is the over current / over temp protective device. Brought to 
you  by the nice folks at Texas Instruments some time before WW 
II.Testing would require knowing the rating, and the amount of time 
required for it to open at 100% of rating, 125% of rating, etc., plus a 
derate for temperature.{Opens sooner the hotter it is.}

      Not having any of that data in front of me, I look at the model 
number of the Klixon®. In that number is usually the rating. Taking my 
trusty Cornell / Dubilier Battery Eliminator,[Capable of 25 VDC @30A 
max.] I select a current output to approximate the rating on the 
Klixon®. Then connect the leads, stand back..........turn the power on 
and watch ! If the Klixon opens within a second or two at room 
temperature, I declare it good and return it to service.

      Any time I've seen a mower motor with the armature melted down, 
the Klixon has failed this test. Bear in mind, I'm not an EE, nor do I 
portray one on Television..........................

RJ


soltrak wrote:
> What exactly is the Klixon on the mower motor and how would you go 
> about checking it?
>
> JL
> On Nov 1, 2008, at 1:31 AM, RJ Kanary wrote:
>
> >      Excessive current draw will cause overheating.A few moments with 
> > an inductive ammeter would steer you in the correct direction. Poor 
> > connections = high resistance = lotsa heat. That's another avenue 
> > that needs to be explored.Another road to take is this............do 
> > any of the Klixons® on the mower motors ever open?
> >
> >          The motor that takes the most abuse is usually the center 
> > one. On the front mount mowers especially since the deck gets bent 
> > and the front part of the blade's path is closer to the ground.If 
> > THAT Klixon® fails closed, under those conditions wiring and 
> > terminals will pay the price.
> >
> > RJ
> >
> > soltrak wrote:
> > > Hello,
> > >
> > >
> > >       When mowing one of the front battery wires on my E12s gets so  
> > > hot at the terminal that it melted the thin plastic safety cover 
> > > that  was touching it. I noticed several other battery tops getting 
> > > warm  also, but this one wire gets hotter than the others. What 
> > > could be  the cause?
> > >
> > > Thanks,
> > >
> > > JL
> > >
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