Does anyone have a solution for MTH Berkshires and some 2-8-0's with the pony wheels jumping off the track at frogs or diamonds and causing derailments? It's driving me crazy. One minute thewy are sailing along smoothly at scale speed with a few cars and a cabin and the next trip around the layout they derail at every mainline switch and diamond.

I think it's the fact that there is not enough weight forward to keep them on the rails, but I'm at a loss as how to correct the problem if that is it. Any ideas that work? Thanks.

Hi all,

I've used the chassis from a Bachmann HO scale USRA 2-6-6-2 as the basis for an On30 locomotive, and I've run into a recurring problem with it.  When I first received the chassis, the screw that holds the front set of driving wheels on was loose, to the point where it was being hit by the universal joint as it rotated and making a loud clicking sound.  After tightening this screw, the model ran well.

Just happened across this older posting on a MR forum. Wonder if any others have comments/observations  about these engines?
 

I have a brand new one that has never had a chance to stretch its legs yet.

I have acquired a Bachmann 80-ton 3-truck Shay. I will be putting a simple SoundTraxx MC1 non-sound decoder in it - it has an 8-pin socket.

I note from the exploded parts diagram that there is a cab light in the locomotive (or maybe, hopefully, it's a firebox light). What I haven't found is what function/aux it is connected to. I could do the trial and error method, but if anyone already knows?