----- Original
Message -----
Sent: Monday, February
25, 2008 9:01 AM
Subject: Re: (ET) Help,
reverse missing?
Is it a major rewire to move
to the later contactors (6 terminals)? Or is it just a matter of
connecting the old wires up to the new contactors and just removing a wire
or 2 that is not needed anymore?
From: RJ Kanary
[mailto:rjkanary nauticom net]
Sent: Monday, February 25, 2008
8:41 AM
To: Banks, Michael J.; elec-trak cosmos phy tufts edu
Subject:
Re: (ET) Help, reverse missing?
Merged
replies for two posts.
Yes. The later contactors make for a much simpler arrangement.If you
wanted to try to fix what you have as an exercise all the individual pieces
are functionally identical.Your assumption about 1F &2F being OK is
correct.
The other contactors that bypass the armature resistors are just swell if
you have three forward traction motor speeds. :) { In Forward. You are
only allowed two speeds in Reverse.}
If one of these were to fail open such as your reversing contactors,
you would be missing a speed change but the tractor would still
move.
Each reversing coil and contact unit is a separate entity.All do the
same function when energized, and the mechanical interlock[ Those little
pins that you better not lose if you decide to try to repair them. :(
] between opposing contactors assures that nothing bad can happen due
to a set on contacts being closed when it shouldn't be.
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