Re: (ET) Ghosts

["Christopher Zach" <czach computer org>]

Yeah, that's the thought: If one of the relays are stuck, the system might
be engaging the 1a and 1f/2f--1r/2r contactors (assuming it's an E10/12/20)
but not engaging the field current.

Since I don't have the diagrams with me, I am not sure if this is a 
possible
thing. Still, I'd say check all the relay points; one might be sticking.

Chris



----- Original Message -----
From: "David Roden (Akron OH USA)" <roden ald net>
To: <elec-trak cosmos phy tufts edu>
Sent: Monday, March 04, 2002 11:40 AM
Subject: Re: (ET) Ghosts


> On 4 Mar 2002 at 11:19, Christopher Zach wrote:
>
> > Might be the shunt issue I was experiencing on my E20: the field 
> > current
is
> > going to zero, but the armature is being powered at full blast somehow.
>
> But with the seat switch open?
>
> I wonder if the first armature contactor might be stuck.  There's enough
> residual field gauss that with the compound series field the tractor 
> might
> be able to move.  I haven't looked at the circuit diagram to see if this
is
> possible though.  Now where's that darn Homeowner's Service Manual when I
> need it?
>
>
> David Roden - Akron, Ohio, USA
> 1991 Solectria Force 144vac
> 1991 Ford Escort Green/EV 128vdc
> 1970 GE Elec-trak E15 36vdc
> 1974 Avco New Idea 36vdc
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