MTH K4 engine derailing on Ross switch

Dale KOGR Forum Member

I just bought a new MTH Railking K4 steam engine (30-1743-1), and discovered that it derails on my nearly-new Ross 042 switches - even at very slow speeds (3-5 mph). It runs great everywhere else. What happens is the pilot truck makes it past the switch frog ok, but the lead driver climbs over the frog. I have run 3 other engines over these switches with no issues. The new K4 is rated for 031 curves, so I don't think the radius shouldn't be the problem. Any ideas what might be causing this and how to fix it?

Thanks in advance for the help.

1/18/209:22 AM

Original Post

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