So my Legacy Ten Wheeler usually runs with no problems. However occasionally (and getting more frequent every day), while the engine is between speed step 4 and 5, the engine takes off like it’s supposed to be highballing. I’ve got 036 curves in some places so you can see my problem. I’ve hand to catch the engine multiple times to keep it from flying off the rails. I’ve reset the engine to no avail. Anyone got any ideas as to why this is happening?
Replies sorted oldest to newest
post up the item no. buddy......so the pros know exactly what engine they are dealing with......
6-11202. Lionel’s CP 914
me personally, i dont use the speed steps. I like using the red dial and getting to my dewsired speed a little slower, especially whan hauling a long trains 20+cars.
It happens when I use the dial too. I can’t drive the engine at all without the fear of it attempting to hit top speed right before my tight curve. I’ve spent way too much time working on this engine to let it fly off the rails and destroy itself.
Speed step 3 or 4 for Legacy is running at very slow speed. Check your momentum setting.
My momentum is set to 6 and my engine will start fine but then it jerks forward and races down the track until I catch it with my hand
It may not be called the speed step but the RR Speed buttons is what I mean. I used to be able to use the 5th button (70 mph) fine but I can’t even use the 4th one now
Flywheel on motor could be loose which is used for sensing speed. I may be wrong but it’s worth checking
The flywheel may be the issue, or the speed sensor could be failing. Obviously, that could be the sensor, the wiring, or the DCDS motor control board.
I’ve finally gotten around to taking the shell off and the flywheel looks fine. I’ve heavily customized this engine’s exterior so I’m a little afraid to send it to Lionel out of fear they’ll either mess it up or just not look at it at all
I had a similar problem which went away after I cleaned pickup rollers and wheels.
Had a problem similar to this with a TMCC/Odyssey equipped engine - found that the engine was losing TMCC signal near a metal drywall corner the engine passed near. Would jerk, sometimes speed up. So I suggest you check the engines antenna for looseness that could result in a short time duration short antenna to frame.
Losing the TMCC signal won't cause the locomotive to run away, it will cause it to stop. His symptoms are classic speed control issues, that points to either the flywheel/sensor, wiring, or the DCDS motor driver board. With the Odyssey II driver board, if it loses the flywheel signal, it will initially take off, and in a few feet it will stop as it figures out it has no signal. The bad part is, if it takes off on a tight curve, it could be a big problem. 
It’s s very bad thing as I mentioned before, this is a heavily customized engine. I can not afford for it to destroy itself as I don’t have either the time or money to start again. Guess I’ll call Lionel next week and see if they’ll do anything. Thanks for trying to help though. Greatly appreciate the effort
Well, I know that Lionel is not taking non-warranty repairs, and this is a locomotive that's way out of warranty. So, I don't see Lionel doing anything about this. You're going to have to entrust it to some repair station at some point if you can't fix it yourself.
I ordered a new sensor from Lionel, installed it and it fixed my engine. Thank y'all for the help!
Success stories are nice, glad it was a pretty easy fix.
Access to this requires an OGR Forum Supporting Membership
