I have 7 LGB turnouts on my layout and they work very well. As part of a track expansion I just put an Aristo Stainless steel Wide-radius Switch in place.   All my motley rolling stock goes through with no problems, except three lGB locos. I'm running two 0-4-0s and an 0-6-0, and they all stop dead at the frog. I have a USA Trains 44 tonner that makes it through with no problems

 

Any ideas? It's not a big deal, it's in a place where I can easily nudge them through. But obviously I'd like to have them work right. Do I modify the switch in some way, or the locos?

 

 

 

Mark is most likely right.

The Aristo WR turnout has the plastic part of the frog raised (most likely to avoid the shorts that were ocurring with USAT and LGB "skates" at the frog).

The Aristo flangeway depth at the frog is too shallow, and you can use the Aristo Gauge to verify this

 

You need to check what the second driver is doing when the first one is on the plastic part of the frog. Just put the loco there and see why the second driver is not getting power. It might very well be the frog has lifted the other driver off the rail.

 

You might want to check my site on what you can do to improve these switches, they need some tweaking, but it's pretty easy, and then they become very smooth.

 

Is it possible that the LGB sliders are touching the "opposite rail" through the turn-out causing a short circuit?

This is actually a fairly common occurance with some makes and I have personally seen this happen.  Try putting a piece of tape over that area where this could occur so there is no possiblility of it occuring and try again.  If it still stops, I would agree that is is a loss of power rather than a momentary short circuit.