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I'm helping a friend set up a small O gauge layout, and I'm having issues with his TMCC Lionmaster Challenger, 6-38013, when running on conventional. The grease in the gearboxes looked ok (though these are very difficult to work on), but now it doesn't run very well, as seen in the video. It was doing it both on the rails and on these blocks. The motors seem to spin by hand well. Any ideas? I'm going to check the motor screws again after I post. It was having other issues before, which is why I took it apart, so when this one is solved then I'll probably either update this post or make a new one with those issues.


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The problem isn't mechanical.  With the behavior shown in your video, it has to be an issue with the electronics, perhaps something to do with the speed sensor.  There are others on the Forum who have firsthand familiarity with all of those circuit boards.  Hopefully they'll chime in and tell you where to start!

Well, it's could be the Odyssey sensor/magnet ring, the wiring to the DCDS motor driver, or the motor driver.  My usual approach is to test the motor driver, and visually inspect the magnet ring and sensor board on the motor.

How would one test the motor driver, and what would I look for on the magnet ring? (which I assume is the black ring on the rear motor, with the sensor on the board below it)

The wiring looks good, I made sure the plugs were in all the way, hopefully I correctly read the wiring diagram I found to trace the correct wires. The distance between the ring and the sensor looks ok, though I don't have my calipers with me to check. Still runs like in the video, unless you give it a bunch of power at once, then it'll run better. My friend said that it's ok if we have to send it to the only shop in the area that works on Lionel stuff, but before I do that, any other ideas?

Tried that a couple times with a borrowed CW-80 that may be acting up, I'm bringing my rebuilt KW over to his house tomorrow, and I have a GW-180 on order for his overhead loop. If that doesn't do it, I have to go down to the city with the Lionel repair shop to pick up a freshly-built gear housing for my 1971 Challenger (the car, not the train ), so I'll drop it off then have it mailed back up here

Update: I plugged in the ground for the lights, set the body back on the frame, and tried my KW, and it acts a lot better, only doing the weird cogging at very low voltages, with more of it in reverse compared to forwards. I guess that the CW-80 I used earlier may be partially to blame? I might keep adjusting the sensor, since it looked a bit farther than a millimetre away from the ring.

Last edited by mattp.426

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