Santa Fe 4-8-4 front pilot.

[Kzurek]

I just purchased an Santa Fe 4-8-4. It's the version front the train set. The front pilot keeps tilting up and derailing around curves only going forward.

[gatrhumpy]

Check the spacing between the wheels using an N scale wheel gauge.

[James in FL]

Balance it.

[spookshow]

Make sure the pilot truck isn't installed upside-down. I've seen that before.

-Mark