(ET) Re: pack not isolated from frame??

["RJ Kanary" <rjkanary nauticom net>]

      As my Dad, the electrician who had 30 years of experience with DC
operated overhead cranes would say, "Son, you've got something that's 'gone
to ground'."
    {Actually, in most cases two items have to fail to make obvious
symptoms.}

    The most common culprits in the Elec-Trak® are.......
1.) Armature resistor contactor bushings.
2.) Armature terminal bushings on the traction motor, or brush rigging.
3.) Lift motor.
     This situation is VERY dangerous, and must be investigated and 
repaired
immediately.
    I have never seen a tractor with the PTO outlet where you have 
described
it. Give us the numbers from the data plate, under the hood, and I think we
can puzzle it out.

----- Original Message ----- 
From: "Dave & Debbie Barden" <daveb seanet com>
To: <rjkanary nauticom net>; <tcoate coate org>;
<elec-trak cosmos phy tufts edu>
Sent: Sunday, January 25, 2004 2:54 PM
Subject: pack not isolated from frame??


>
> I was working on my modified E15 (?) today, and while loosening a
connection on
> one the cable connections I grounded to the body with the wrench and got
an
> ugly juicy spark.  That doubly surprised me because I am always careful
around
> battery terminals and potential grounds but also because I thought that 
> if
the
> pack was not grounded to the frame you wouldn't/shouldn't get current
flow??
>
> So what gives here am I under a mis-impression and showing my ignorance 
> or
do I
> have a ground somewhere that I shouldn't have??
>
> Also since this tractor has been modified by the previous owner I don't
really
> know what model it is.  My E12S has the PTO plug up front on the left.
This
> one has the PTO plug down by my right foot.  Would this be an E15 or E20
or???
>
> thanks much,
> dave
> Seattle
> E12S
> E?? modified
>
>
>
>
>
>