Re: (ET) tractor no worky

Assuming this is a normal E15, the two relays are for field reversing and field weakening bypass. All RTN function, along with contactor timing, is controlled by the circuit board.

Mike, is the power usage gauge registering current use while the unit is clacking away? My friend’s was.

Nick

From: jlantonucci comcast net [mailto:jlantonucci comcast net]
Sent: Wednesday, May 21, 2014 2:51 PM
To: Michael S Briggs
Cc: elec-trak cosmos phy tufts edu
Subject: Re: (ET) tractor no worky

I think the other realy is return to neutral for the PTO. I know I've lost contactors due to shorts. I've made the mistake of trying to remove the charger without disconnecting the battery cable going to the rear pack. I lost a contactor on that one that otherwise appeared fine.

From: "Michael S Briggs" <msbriggs unh edu>
To: jlantonucci comcast net
Cc: elec-trak cosmos phy tufts edu
Sent: Wednesday, May 21, 2014 2:35:53 PM
Subject: Re: (ET) tractor no worky

On Wed, 21 May 2014, jlantonucci comcast net wrote:

> Mike - check you battery voltage. Highly discharged batteries can cause
> those symptoms. Then check your relays.
> Some people use Curtis controllers (or others) but the Alltrax is the only
> one specifically designed for our tractors.
>
> Jeff

Jeff - it's a little over 38 V. The forward/reverse relay is a fresh one I
just put in to replace the one that may have been blown - but I still get
the same symptoms. Hm, I can't remember what that other leaf relay is
for....

Thanks,
Mike