Thanks Len,
Further experimenting leads me to believe that the problem lies in the odd way that this locomotive's power pickups are wired. (There is pickup between the two non-traction tire equipped locomotive drivers and between the two front and rear tender trucks.) The tender trucks have axle wipes with insulated wheels on alternate sides. So, for track current to flow to the the decoder input, current must flow between the tender's two front and rear axels. I cannot visualize the wiring diagram, which, Bachmann chose not to show in any of their documentation. Also, by the way, the turnout which is adjacent to the track pickup, has an insulated frog, and if the engine is going fast enough, the aforementioned stall does not occur.
Don
Further experimenting leads me to believe that the problem lies in the odd way that this locomotive's power pickups are wired. (There is pickup between the two non-traction tire equipped locomotive drivers and between the two front and rear tender trucks.) The tender trucks have axle wipes with insulated wheels on alternate sides. So, for track current to flow to the the decoder input, current must flow between the tender's two front and rear axels. I cannot visualize the wiring diagram, which, Bachmann chose not to show in any of their documentation. Also, by the way, the turnout which is adjacent to the track pickup, has an insulated frog, and if the engine is going fast enough, the aforementioned stall does not occur.
Don