Re: (ET) Bench testing

["RJ Kanary" <rjkanary nauticom net>]

      Every time that someone suggests using the charger to test the 
tractor, I HAVE to post the same thing. DO NOT DO THAT!
The diodes in the charger don't appreciate it, and will die. Any solid state 
components the tractor might have it its control system damn sure don't 
appreciate being fed all that AC ripple.
       To prove this to yourself, obtain a graphing multimeter and look at 
the charger's unfiltered output.Look at how much higher the AC spikes are 
than the expected DC output.That's not what you want to feed to thirty 
something year old components.
       Bear in mind that I am not a EE, nor do I portray one on television. 
But I have repaired several chargers that others have attempted to do this 
with.  :(

----- Original Message ----- 
From: "Tim Humphrey" <hump evgrin com>
To: <elec-trak cosmos phy tufts edu>
Sent: Wednesday, June 14, 2006 10:40 AM
Subject: Re: (ET) Bench testing


> Sure you can bench test it.
>
> Leave the gear shift in neutral, plug in the charger, engage the main 
> disconnect and try out the controls using the
> ET's charger as the power source.
>
>
> --
> Stay Charged!
> Hump
> "Ignorance is treatable, with a good prognosis. However, if left 
> untreated, it develops into Arrogance, which is often
> fatal. :-)" -- Lee Hart
>
> Get your own FREE evgrin.com email address;
> send a request to ryan at evsourcecom
>
>
> > -----Original Message-----
> > From: elec-trak-bounces cosmos phy tufts edu
> > [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of JBR
> > Sent: Tuesday, June 13, 2006 11:45 PM
> > To: elec-trak cosmos phy tufts edu
> > Subject: Re: (ET) Bench testing
> >
> > If the main control circuitry runs on 36 volts, then connecting to only 
> > 12
> > volts won't operate it properly - and if contactors pull partially in, 
> > they
> > arc weld real nicely ( I can show you nice pictures from my Comuta-Car 
> > when
> > it did this).
> >
> > Also, since the main drive motors are sep-ex, even with  motor by itself 
> > on
> > bench you want to be a little careful about connections.
> >
> > The mower deck, Snowblower, and Rototiller motors are a little easier to
> > connect to your car battery.
> >
> > On Tuesday 13 June 2006 10:38 pm, Peter Bishop wrote:
> > > When I found my E15 I hooked the snowblower motor to my car battery
> > > with jumpers to see if it turned.  I don't see why you couldn't do a
> > > simple test like that.  You wouldn't even have to take the tires off,
> > > just jack it up and block it safely.
> > >
> > > Pete.
> > >   ----- Original Message -----
> > >   From: BRIAN ROSS<mailto:rossbt verizon net>
> > >   To:
> > elec-trak cosmos phy tufts edu<mailto:elec-trak cosmos phy tufts edu>
> > >   Sent: Tuesday, June 13, 2006 8:02 PM
> > >   Subject: (ET) Bench testing
> > >
> > >
> > >   I have an E12 that became mine with dead-dead
> > >   batteries, flat tires and bad front axle.  I was
> > >   wondering if anyone has pulled the tires and "bench
> > >   tested" the operation of the tractor.  I was hoping to
> > >   locate some used batteries and give it a go before
> > >   having the wheels blasted and painted and adding new
> > >   tires and axle.  Anyone see any problems with this?
> > >
> > >   Brian Ross
> > >
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> > >
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> >
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>
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