I totally agree with that statement.theres usually a spring between the bodywork and the truck whicch fits over the fixing screw to allow for imperfections in the track.I'm not familiar with that loco, but it seems to me that you might be fitting it upside down!?!
Should the spring be between the pony truck and the chassis?
I would say yes, and there may be a short (6mm?) spacer that is slightly smaller diameter than the spring missing. - Not sure on the spacer, but would make some sense.Should the spring be between the pony truck and the chassis?
Could be a Pearse (think that's the name) did a couple of US outline 2-6-0 live steamersI would say yes, and there may be a short (6mm?) spacer that is slightly smaller diameter than the spring missing. - Not sure on the spacer, but would make some sense.
What make / model is the loco?
PhilP.