I had problems with 2 wheel pilot trucks derailing on two of my engines: a Weaver 2-8-0 and a K-Line 2-8-2. Both engines are die cast, as is the pilot truck assembly, and both were derailing their pilot trucks at facing point switches. After checking for some sort of binding that might raise a wheel and finding none, I installed several of those little "stick on" type wheel weights used by tire shops to balance mag or aluminum wheels. These weights are only a few ounces so I crowded two if them on the top of the pilot tuck frame and one on the bottom, making sure that there remained enough clearance between the truck, the pilot, the track and the steam chest.
Problem went away! Both engines negotiate all switches and frogs on my layout and I have about 65 switches total. Since then, I have also used those little wheel weights on several locos to add weight or better balance the engine, Cheap fix and it works, permanently.
Paul Fischer
