From:
elec-trak-bounces cosmos phy tufts edu
[
mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of RJ
Kanary
Sent: Wednesday, November 05, 2008 11:57 AM
To: Max Hall
Cc: Elec-trak
Subject: Re: (ET) Overheating Problem
I made the mistake of
NOT doing that ONCE in 1975. NEVER again. A Speidel® Twist-O-Flex® watch
band must have two or three ohms of resistance at 12 volts, judging from
the long lasting burn scars I had on my wrist.............. Smelled bad,
too.
RJ
Max Hall wrote:
"...remove your wristwatch." This may be the greatest
discussion board there is!
On 11/5/08, RJ Kanary
<rjkanary nauticom net>
wrote:
REAL good chance. Does the
Fuel Level gauge indicate any life?If it doesn't, remove your wrist
watch. Then remove the access cover for the Control Cabinet.Feel around
the Power disconnect until you find the copper disc inside of the PD.
Rotate it with your fingers and watch the Fuel Level Gauge. Does it
twitch and indicate signs of life now? If so, order the new, much more
trouble free replacement from Harold Zimmerman or any of the other fine
purveyors of Elec-Trak® parts.
RJ
soltrak wrote:
Well, I seem to have narrowed the overheating problem to the one battery
wire. There was a bad connection at the wire lug. I replaced the wire,
which runs from the second battery in front to the power disconnect
switch. NOW the drive motor won't run!! I switched off the
Power Disconnect switch when I changed the wire. Is it possible the
switch is faulty? When I try to put it in reverse or forward, the relays
switch but nothing happens.
JL
On Nov 2, 2008, at 11:12 AM, RJ Kanary wrote:
For those of you that are playing at home......................
Klixon® is no longer under the TI umbrella.They've been spun off. so,
after tracking that down, I found this.
http://www.sensata.com/products/controls/tcb-c.htm
So if you feel compelled to set up your own
testing station, those are the specs.You can track down the traction
motor external Klixon® by following the appropriate links. A bit more
digging should yield the specs for the Klixon® found in the field of the
traction motor.
Enjoy. :)
RJ
RJ Kanary wrote:
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
_______________________________________________
Elec-trak mailing
list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
_______________________________________________
Elec-trak mailing
list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
No virus found in this incoming message.
Checked by AVG.
Version: 7.5.549 / Virus Database: 270.8.6/1768 - Release Date: 11/4/2008
9:38 PM
No virus found in this outgoing message.
Checked by AVG.
Version: 7.5.549 / Virus Database: 270.8.6/1768 - Release Date: 11/4/2008
9:38 PM
_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak