Re: (ET) Running but still odd things, tiny screw head on the thermal breaker, left or right?

["Harold Zimmerman - Clean Power Supply" <cleanpower mailbug com>]

 Hank,
 I wouldn't do it. :-)
 Are you sure you have all 7 speeds? You should be running in 3rd speed 
forward for most of your driving time, which bypasses the power resistor 
up in the front of the machine. If that resistor is still heating up you 
are probably missing a speed. 
 If you are running wide open all the time, that is, with Field Weakening 
in the circuit, you will be drawing high amps and tripping the circuit 
breaker could be expected.
 I would consider changing out all the switches in the speed control 
except for the F/R switch (can be done for under 50 bucks) and all the 
terminals going to cards 1 and 3 (again, not much cost), and if you feel 
the circuit breaker is over-sensitive, I would replace it with a new one 
(again, less than 50 bucks)
 Sincerely,
 Harold Zimmerman
 Clean Power Supply
 
On May 20, 2019 at 9:55am -0400, you wrote:

>Finally got my ET15 to go in all speeds forward and back by pushing in 
>all the shifter micro switch and tighten them down a bit more than they 
>were.
>Also tightened some of the clips on the card, just a little at a time, 
>and put some new fasteners on wire group 49 & 11 that go to the forward 
>and back relays.
>
>Still a bit quirky, but at almost 50 years old guess we all were, even 
>with new boards and a new relay.
>
>My problem now mirrors yours.  The freak 'n thermal switch seems to be 
>too sensitive.  I'm very safety minded, (RIT engineering student, 
>commercial Underwriter & Insurance agent),  but I'm tempted to by bass it 
>like I did on the many years ago for the snow thrower's circuit breaker.
>
>II see that there is a tiny screw head on the thermal breaker.  Can it be 
>adjusted?  It so, turn to the left or the right?
>
>Thanks,
>Hank
>Ralston Agency, Inc.
>-----Original Message-----
>From: Chris Zach [mailto:cz alembic crystel com]
>Sent: Monday, May 20, 2019 8:01 AM
>To: Elec-trak list <elec-trak cosmos phy tufts edu>
>Subject: (ET) Running but still odd things.
>
>Well, I finally finished refurbishing the deck with a new shell. This one 
>has baffles, which means I need to think a bit before putting in my 
>stiffener bar over the discharge chute (which is currently only supported 
>by the little blanking plate). That part of the deck takes a lot of 
>stress, need to think about it a bit.
>
>Fired it up, lot of vibration. Took the blades off, spent some time with 
>a cheap-o balancer (the Home Depot one doesn't really fit the holes) and 
>took some metal off one side on each blade. Now there is a lot less 
>vibration, but not quite perfect. Good enough.
>
>New problem is that the tractor is going into speed 4 right off the bat 
>even though all contactors are *not* closed. Very weird. In reverse it 
>feels like the field is not coming on, also weird as the motor heats up 
>quickly and trips the thermal switch on the motor housing.
>
>I'm not sure if there is a field problem or a short in the main wiring or 
>something else. It's never dull, I'll check tomorrow when the weather is 
>down to the 70's.
>
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