Re: (ET) CHARGER

[Allan <allanhv worldnet att net>]

I have seen both bad transformers and bad diodes. Since I had one charger 
with
a bad transformer and the other with bad diodes, I swapped some parts and 
got 1
working.

I my case, the transformer went bad on a hot day trying to charge batteries
which were really old and had at least 1 bad cell. I believe the 
transformer
overheated, breaking down the insulation and resulting in a short on (I 
think)
the secondary.

I removed both chargers from the tractors before trying to work on them. 
In my
case (E16 / E20), it was easier to remove and test/fix than to try to reach
into the bottom of the foward battery compartment.

If you do decide to repair your charger, if you need parts, or if you want 
a
replacement unit, you could contact Technical Services (608) 868-6220.

As far as the soldering, I used a pipe tourch to get enough heat fast 
enough
without cooking the wiring and/or diodes. If you take this approach, be
extreemly careful not to overheat the wire and/or diodes. The faster you
(de)solder, the cooler the diodes and wire will stay. Try not to use any 
more
heat than necessary to melt the solder. Also, be sure to use electrical 
solder
(with rosen or no-clean core), not acid core (pipe) solder.


"Pestka, Dennis J" wrote:

> Hi;
>
> Just started to fool with a E-12M I recently purchased.
> Looks like I'm getting nothing out of the charger. It hums but I see no
> voltage on my meter. Started looking at my repair manual, but my 
> electrical
> background is limited at best.
> It said to test the diodes I had to disconnect the soldered on wires. Is
> this right?
> Do I have any other options such as a rebuilt unit, or someone to repair
> this one?
> This is the first tractor I have had and I would appreciate anyones past
> experience good or bad.
>
> Dennis