Re: (ET) Power Disconnect for an E12M

[dave barden <daveb speakeasy org>]

I should be starting a new thread here but don't know how.  maybe someone 
could
enlighten me.

Anyway my friends and I were debugging my newly acquired E12S (it doesn't
move).  After cleaning all the battery terminals and various other 
connections
and dropping the motor to the ground we finally got the motor to spin but 
always
in the same direction, reverse.  Swapping the field wires at the motor 
didn't
make any difference.  This was really puzzling.  Then we pulled the field 
wires
off altogether and lo and behold the motor turned still in reverse.  
Tracing the
wires we discovered one of the wires from the siamesed relays (installed 
by the
previous owner to  simulate the original reversing relay) had at some 
previous
time taken enough current to burn the little jumper between pins inside a
connector further down the harness.  Bypassing the burnt out connector and
removing the siamesed relays we got voltage to the field and then 
reversing the
field wires had the expected and desired result of turning the motor in 
opposite
directions.  My friend Craig has found a double pole double throw relay in 
the
Hosfelt catalog that appears to have adequate specs  10amp at 30volts but 
for
the ridiculously low price of $1.49!  I wonder if it is advisable to use 
it?

I see the original relay/contactor is rated at 36v but no amp rating.  It 
is
fried and I don't know for sure how it got that way but suspect the cable 
under
the tractor that had its insulation ground off when it evidently came in 
contact
with the pulley at sometime might have something to do with it.  It says
Technical Services on the coil inside the relay.  Can someone give me an 
idea
what this relay costs?

thanks,
    dave

Chris Meier wrote:

> I was at a Northern Tool store last night, and they had a Pollak brand
> battery disconnect switch, rated 6-36v, 150amps, for $20.  The ratings
> are a bit low for worst-case conditions.  I don't know the price or 
> ratings
> of the newer disconnect unit that Bill Gunn sells, but you'd probably be
> better off using the unit he sells (based on past recommendations).
>
> On Thursday, April 27, 2000 6:51 AM, ThompsonG DFO-MPO GC CA
> [SMTP:ThompsonG DFO-MPO GC CA] wrote:
> > So, Here is the question/problem?
> > I need or would like to find a Power Disconnect for an E12. At the 
> > moment
> I
> > just have a hole on the side of the tractor where it should go and a 
> > green
> > wire dangling from the Amp Meter. If you have one you are willing to 
> > sell
> > me. Please E-mail me
> >
> > I was digging around in my new E12 and discovered a lose green wire 
> > under
> > the dash. It came from the Amp meter. After a little while of staring 
> > at
> the
> > schematics and the wiring diagrams in the manual. It finally clicked I
> have
> > no power disconnect. Therefore I have no place to connect the Amp 
> > meter.
> My
> > goal is to restore this ET to nearly, new condition so I need a power
> > disconnect.
> >
> > Geof Thompson B. Sc.
> > Data Management Engineer
> > Canadian Hydrographic Service
> > Central and Arctic Region
> > 867 Lakeshore Road
> > Burlington, Ontario
> > Canada. L7R 4A6
> >
> >
> > Phone (905) 336-4698
> > Fax (905) 336-4698
> > E-mail Thompsong dfo-mpo gc ca