RE: (ET) Re: Dead on the road

["Markus Lorch" <mlorch vt edu>]

Thats a very good point. I also had a similar issue that I 
experienced plowing the little snow we got. I assume because
of the cold the accellerator peddle didn't go back all the
way and the tractor would remain in speed 1 until stopped 
via the break switch. Once stopped I was unable to move
again as the speed peddle had not returned to speed 0
and thus the RTN (return to neutral) relay wouldn't
permit me to start again.
I had suspected the break switch and I puzzled until
my puzzler was sore, then I had an idea, a wonderful
awful idea .... (just like the grinch)
... and found the speed selector/peddle to be the source
of all evil :)

A quick cleaning of the old grease from the speed 
selector box made it slide easily again.

Markus


> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu 
> [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of 
> Elie, Larry (L.D.)
> Sent: Donnerstag, 27. Januar 2005 10:26
> To: Christopher Zach; Klein Robert W NPRI
> Cc: Elec-trak list
> Subject: RE: (ET) Re: Dead on the road
> 
> 
> First thing to check when 'dead on the road' (and I don't 
> think you have 
> this-- you won't get any motor) especially in the winter when 
> there is 
> snow and ice coming off your shoes, is did the brake return to normal 
> position?  Is the brake switch still working or did it get wet?
> 
> Larry Elie
> 
> 
> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu
> [mailto:elec-trak-bounces cosmos phy tufts edu]On Behalf Of 
> Christopher
> Zach
> Sent: Thursday, January 27, 2005 9:13 AM
> To: Klein Robert W NPRI
> Cc: Elec-trak list
> Subject: (ET) Re: Dead on the road
> 
> 
> Ok, let's see:
> 
> When you push down on the throttle with the gear in neutral, does the 
> motor spin slowly and at the same time is your current meter 
> way over in 
> the red?
> 
> Ifso, simple problem-o; the field is not being energized. The 
> motor will 
> still turn a little in neutral because there is a small compensation 
> field in series with the armature, but nowhere near enough to 
> move the 
> tractor, and the weak field will cause the armature to draw a lot of 
> current.
> 
> Start by checking your relays, especially the one over to the right 
> (looking down from the top while in the driver's seat). My 
> guess is one 
> of them is not connected, or at worst case you unpluged the 
> field wire 
> at the motor somehow.
> 
> Chris
> 
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