Re: (ET) E15 oddness...

"However an odd thing happens: I had a 7a fuse on the controls, and it would blow pretty regularly. I replaced it with a 20 and it drove fine, but if I didn't totally stop before going into reverse the fuse would blow"

Sounds like what happens to me - the field is staying on whenever the tractor is in motion, so when you are trying to reverse while still in motion, this arcs the relay and blows the fuse. On mine the field is manually controlled, but on the originals, wasn't the MOV what prevented this? You need that field card installed.

I believe the HSM is on the elec-trak.com site in PDF. It has block diagrams and schematics. To an electrical novice like me, the block diagrams help a lot. It's like 12 MB and covers all the models.

David Brandt

From: Christopher Zach <cz alembic crystel com>
To: elec-trak cosmos phy tufts edu
Sent: Monday, May 9, 2011 3:25 PM
Subject: Re: (ET) E15 oddness...

So I drove around with the wreck-that-is an E15 yesterday. One of the tires is dead-flat, but I think the front ones are still holding air (sprayed the needle valves with silicon to lubricate the rubber seals). One tire is totally shot, and of course it has no seat or anything in the back :-)

However an odd thing happens: I had a 7a fuse on the controls, and it would blow pretty regularly. I replaced it with a 20 and it drove fine, but if I didn't totally stop before going into reverse the fuse would blow, the voltage gauge would display voltage, and as soon as I put it into gear I would hear a click click click and the voltage would drop to zero.

Another odd thing: Letting it run in neutral to check the contactors I noticed that although speed 2 makes the contactor click, motor speed does not change. Might be a bad contactor, will check. However after awhile the motor speed would fluctuate down a bit, then come up, then down, then the 20a fuse would blow again.

Relay arcing perhaps? I'm still using an old relay for FW, maybe it's arcing the field and blowing the 20a fuse.

I really wish I had the page of my owners' manual that had the schematic for the E15; I think I lost it. Can I get a copy of the manual from somewhere?

However any idea what's up? I haven't pulled Card 1 to check for damage, but I don't have the resistor/MOV card in there yet for field weakening.

C

On 5/9/2011 2:10 PM, Steve Caplan wrote:
> Hi guys.
>
> My e15 with Alltrax controller took a dive. The pto relay was pitted &
> was arcing so I pulled it out & filed the contracts. After I reinstalled
> it I flipped the pto switch and the mower motors ran fine. Stitch off.
> Then I backed
>
> out of the garage went 10 feet towards the lawn flipped the pto switch
> on mowers started to spin & everything quit. Pushed it back to the
> garage pushed in the power disconnect switch & fire came from b3. HELP!
>
>
>
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> Elec-trak cosmos phy tufts edu
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