Re: (ET) E 16

[David C Robie <mycroftxx1 juno com>]

The RTN relay is necessary, and the basis of safe operation of the
tractor.  If these things run away they can run through the side of a
garage.  Or bust the hell out of your neighbor's Mercedes.  If you fall
off the seat somehow you could get run over or even mowed.  And of
course, as the brake is in the circuit too, it shuts off the motor when
you hit the brake.  Full brake with motor still on she don't even slow
down. RTN prevents all of this.

RTN is like a latch that is set when all safeties are satisfied, and
released when any one of them is not.  It also drops out on motor
overheat or brake application.  It kills the accessory too, which must be
manually restarted, as the tractor itself must. RTN is a smart little guy
in a proper use and to take him out is to court disaster. 
    I believe that the electronic package to convert these has it built
in,  a 'preventer; circuit  that wires to these safeties and won't allow
startup like RTN don't if all is not satisfied.

YAH I'll  check out that schematic.  If it's a 16 you are in.  Been
thinking of converting my Wheelhorse 'GE 12' to a 16.  Think she's got
the right cam.  Did a 15 yrs ago without a print, just copied a 16.  wish
I had documented it.  To do this you need a field motor, not PM and I got
a spare.

As to rewire;  don't go full power right after 1A and 2A.  Stage it up
through the higher speeds by using those top 3 microswitches to change
resistor values.  Will have to sketch the resistor mount.  You likely
will have to cut the lever notch in the dash for more fwd control
movement.  I almost never use the 'full' positon it's too much and uses
up the batt fast.  Good if you want to make a quick trip to the local
grocery store half a mile away though.  If you're in a town where the
cops don't care.  When I first did this the neighbors gawked.  They saw
me goin like hell but heard nothing. Even a real noisy tranny you can't
hear of you're off the tractor.
    When done she will stage through the upper speeds so smooth you'd
think she was electronic.  If  she don't on a 15, 16 or 20 you need new
microswitches in the controller and might have to bush up the cam if it
wobbles, and replace the pin on the lever that drives the cam

Dave
Weymouth MA

On Sat, 15 Jul 2006 21:31:11 -0400 "Jerry Rhodes" <jerry38 alltel net>
writes:
> Dave, I'm going to send you a PDF file on the WH 145 please look at 
> the two 
> schematics an let me know what you think about using it for rewiring 
> a NI 
> EGT 120 or a E 15 / E20 it looks like what you are talking about. 
> I'm going 
> to redo mine and take out the RTN junk and run the speed control as 
> Start- 
> 1A-2A FW 1 then full power..am I on the wrong path or not, thanks
> 
> Jerry NW Ohio
> ----- Original Message ----- 
> From: "David C Robie" <mycroftxx1 juno com>
> To: <jerry38 alltel net>
> Cc: <mycroftxx1 juno com>
> Sent: Friday, July 14, 2006 10:33 PM
> Subject: Re: E 16
> 
> 
> >I don't have a print for it (but have the rest of the big thick 
> green
> > dealer's repair manual on all other models)  but an E16 is an E12 
> with a
> > wound field motor instead of PM motor and no big printed circuit 
> board.
> > It changes the field weakening resistance direct from the 
> controllers cam
> > switches and does it's safety shutdowns direct without blasted
> > electronics having a part of it -  just like an E12 does.  It is 
> the way
> > that all 15's and even the E20 could have been buit if some high 
> placed
> > engineering decision maker at GE didn't have some worthless nephew 
> or
> > something in the electronics business who needed work. My belief 
> that the
> > 16's were late issue (as they had blue coil relays, the lousy ones 
> that
> > the coils burn up on) and built after the dealer who's manual I 
> got went
> > out of business.  Possibly some wheelhorse Etractors were 16's but 
> I
> > haven't seen one or the manual for one.   (they are so simple can 
> usually
> > troubleshoot em without a manual)
> >
> > On Fri, 14 Jul 2006 19:08:51 -0400 "Jerry Rhodes" 
> <jerry38 alltel net>
> > writes:
> >> Dave you keep talking about the E 16, can you tell my about the E 
> 16
> >> an maybe have a schematic for one, thanks
> >>
> >> Jerry NW Ohio
> >
> > 
> 
> 
>