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I was running my Lionel 6-11127 Legacy Southern Pacific Daylight GS-4 #4436. Suddenly, it stopped by itself. There was no short. There were still sounds, and I noticed the number lights blinking. However, the engine would not respond to the CAB-2 or to a CAB-1. I powered down the engine, waited, then powered back up. The engine came on immediately, with no input from the CAB, and it was still unresponsive to the CAB (it may have started to go forward, by itself, but now I can't remember for sure). I put the engine in program mode and tried to reprogram with reset code #1, per the owner's manual. There was no sound from the engine confirming the reprogramming. Then, when I put the engine into run mode and powered up the track, the engine not only came on immediately, but after a pause, it began to move in the forward direction. By cycling the track power, the reverse unit cycles, as if the locomotive is running conventionally. I have tried clearing the the engine from the base using the Legacy System Utility, clearing the train it was part of from the CAB-2, and reloading the engine using its orange module. I have also tried changing the engine's ID number. There is no change from what I have described above.

Any ideas?

Cheers!

Keith

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Keith L posted:

Does "popping in" mean it's just plug and play?

Other than reprogramming the new one like it was a new locomotive.

Keith L posted:

I think I'm seeing four screws to remove in order to remove the boiler from the chassis: two just behind the rear axle of the pilot truck; and two about even with the rear axle of the trailing truck. Does this sound right?

Sounds about right, the screw locations should be in the User's Manual.

gunrunnerjohn posted:
Sounds about right, the screw locations should be in the User's Manual.

Thank you. I had never noticed that the body screw locations are indicated in the lubrication schematic in the user's manual. There are four screws that are the same ones I had identified by examining the chassis--but it's good to have confirmation so I know I'm going in the right direction before I start.

Just for jollys, I tried reseating the R4LC board. Didn't help. The handrails looked fine--not shorting, good connections. I didn't have an R4LC board from another Legacy loco of a similar vintage to experiment with, but, at this point, it seemed pretty likely it was the R4LC, so I ordered one from Lionel. It arrived very quickly--outstanding customer service from Lionel. I don't have the greatest fine motor skills, so rather than "popping in" the R4LC, I just plugged it in. Voila! Back in business. While I had the "hood open," I cleaned out the smoke unit and put in new batting. Of course, the smoke is better now. An unexpected side benefit of replacing the batting is that, finally, I no longer have the smell of the smoke fluid scent that my wife hated. Last but not least, just to torment myself, I replaced the traction tires. Should have left that job to my wife. Anyhow, props to John for his on-target diagnosis. Thank you!!!

Cheers!
Keith

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OGR Publishing, Inc., 1310 Eastside Centre Ct, Ste 6, Mountain Home, AR 72653
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