Re: (ET) Another person with charger problems..

["RJ Kanary" <rjkanary nauticom net>]

     Likely killed one of the rectifiers.Personally, I have never thought
that using the charger to operate the tractor without batteries is a good
idea.
     I have seen the result you now have more than once. The PIV of those
diodes is marginal at best for the job they are supposed to be doing.
{Charging  batteries. } The voltage spikes that result due to no batteries
present to cushion the spikes just allows the issue to surface sooner.

----- Original Message ----- 
From: "Chapin, Tim" <tchapin umich edu>
To: <elec-trak cosmos phy tufts edu>
Sent: Monday, July 12, 2004 10:31 AM
Subject: (ET) Another person with charger problems..


> On vac. last week, I finally got a chance to mess with the e-20 that has
> been setting after the purchase for over 2 year now.  The snapped off
> circuit breaker still was working so I wired it in place with plastic 
> wire
> ties, pumped up the tires, put in some washer shims to take care of the
> slipping steering gear and plugged in the charger.  It hummed just fine 
> so
I
> hoped on and stuck it in ll, flipped the reverse switch and stepped on 
> the
> "gas" .  It came to life (no batteries) and moved back about 3 ft.  So I
> pushed my luck and flipped it to forward and stepped on the gas.  It 
> mover
> forward, I thought, let's check out all the speeds and keep pushing the
> peddle down.  Then it happened.  The buss from the charger changed to a
very
> loud rattle, the tractor stopped and about 5 sec. later the 20 amp 
> breaker
> on the plug let go.
> Now if I try the charger I get the loud rattle.  I unplug it before the
> breaker pops.
> What did I do to the poor charger?  Any ideas?
>
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