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Discussion Starter #1
2023P
It started acting up by slowing down and sometimes stopping. I took the cab off and found the e-unit was not screwed on, so I removed it from the bracket and sure enough the bracket mounting screw had come free. Then I posted to find out how to put it back together (thanks). Once together, I put it on the track and it went nowhere. The short indicator light lit on the transformer.
I took it apart again and found a yellow wire broke off from somewhere. I guessed it went to the collector and since I don't have yellow wire I soldered a black piece from a connection on the collector to e-unit. I tried to follow the wiring on the 2023 diagram.
The motor runs if you jump from the collector roller to the motor directly and the e-unit cycles if powered separately, but when everything is back together something is shorting out. I checked all the wiring for bare spots and tried to make sure all the wiring is as shown in the diagram. Now I don't know what to try next. I'm stumped and could use some pics of 2023 wiring. The diagrams help but pictures are easier for me to understand.
I need to make sure the collector is wired correctly.
I'd appreciate any help so I can get back to enjoying my trains.
thanks,
Newtown Joe
 

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I had a similar problem when putting back together the 2031 I am rebuilding. I had forgotten to put the black cardboard insulator under pick up assembly when I put it back on. Just something for you to check.
Randy
 

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Discussion Starter #3
2923 electrical short

Do you mean that flat insulator that sits on the top of the roller assembly? It is held on by a few tiny studs? I saw that and left it alone because it looked like it might break if I removed it so I just cleaned up some oil on.
Thanks for the help but I think there is something else wrong.
 

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Sounds like that is not the problem. I dont have any pics right now but I was just wiring mine last night so I will see if I can help. From the rollers there should be one red wire from the center of the pick up to the side of the e-unit with the group of black wires. There should also be a black wire that goes from the sliding shoe to the front coupler. The yellow wire would run from the motor to the bottom fingers on the e-unit.
 

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Hobo for Life
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I don't think I have one to take pictures of but if you put up some pictures of yours I'm sure someone will figure it out.
 

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Discussion Starter #6
2023 electrical problem

It runs off the track with the transformer but as soon as I put it on the track it shorts. I think it's wired correctly.
 

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newtown, how did you hook it up off the track? additional info, I looked up the wiring diagram and if the wiring is original the yellow wire goes to the e unit and the motor , not the collector plate. hope this helps.
 

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Discussion Starter #8
2023 electrical short

The yellow wire is correct as you describe.
I went from the collector underneath to the motor and then the e-unit and both made the engine run. Put it on the track and it shorts. I found a loose yellow wire and think maybe a previous owner replaced the red wire to the collector with this yellow wire so I redid it with a black wire because that's what I had. I put it from the collector to the e-unit where three other wires connect. Part of the problem with working on these old engines is you never know what the previous owners did and if they changed wire color. This diesel ran really well since I got it,:dunno::dunno: but something changed. I'm starting to suspect the e-unit. Although it cycles, I noticed that when it's set on the contact it shorts but when I move it away it works.
The lever always seemed to be loose and would move on its own once in a while.
These are the clues but I'm not going to change the e-unit until I'm sure it's defective.
 

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Railroad Tycoon
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You do know that the color of the wire has nothing to do with it's running? :confused:
 

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Railroad Tycoon
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If the lever to the e unit is loose it is not making a good connection to the positions, it won't cycle right.
But I don't think that would make it short out.

sounds like there is a wire hooked up wrong somewhere.
 

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Ok, take some pictures if you can, it sounds right, check the wires on the e unit make sure there not loose or solder is sloppy and touching other points.
 

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Discussion Starter #13
2023 electrical problem

To get back to the beginning it started by hesitating and stopping on occasion. I discovered that the e-unit mounting bracket screw managed to unscrew and the e-unit was free. I remounted it and then it stopped running on the track. I didn't alter any wiring up to this point. Then I noticed a yellow wire that was disconnected. I removed the collector and only saw one wire attached so I guessed that the yellow wire came off of the contact. I know that wire is supposed to be red but there was no red wire at all.
So I guess I need to study the wiring again and make sure everything is correct. I do see in the diagram that there is a insulating washers and spacer that go on with the collector screws. I only have one washer on one of the screws. How important are these to preventing a short?

http://pictures.olsenstoy.com/cd/locos\loc2023e.pdf
 

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Try this, Lay the engine on it's side, jump your u terminal from the transformer to the pick up roller. Then jump the a terminal to the front wheel, the motor should run. Then try jumping the a terminal to a rear wheel, if it shorts there then the problem lies with the pick-up and is probably related to the insulators. remove the screw that is does not have the washer and try again. maybe you can isolate the short this way?
 

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Discussion Starter #15
2023 electrical problem

I tried your suggestion and the motor did not run (sparks) when I went from the collector to the front wheel and then the back wheel.
 

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definitely sounds like a wiring problem in the engine. but I am running out of ideas to help you find it. There are other guys on here who are better than I am, maybe one will jump in here soon. And as always, picture will help!
 

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Discussion Starter #19 (Edited)
2023 electrical probelm

Well, here's some pics of my bad boy. Note the one with the red jump wire from the contactor to the motor. The wheels are spinning at top speed.
 

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Paper Shuffler Extraordinaire
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In looking at the diagrams and your pics I've found one thing. There may not be a red wire, the wire from the pick-up. The wire from the pick-up goes to the circled area. If you connected the yellow wire to the pick-up, you may have created a short there. Hopefully the pic will help you out. Check this thread http://www.modeltrainforum.com/showthread.php?t=3040 T-man did an e-unit repair, so it should help.



Carl
 
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