Trailing truck tripping switch track

I've found this to be a common issue with certain locomotives and many FasTrack Switches.  I've modified about 30 of them to work without issues even adjacent to curves.  Since yours appears to already already be embedded in scenery, my first suggestion would be to check the wheel gauge of the trailing truck to make sure it's within spec.

From the picture it looks like the swivel rail does not completely engage the outside rail. That tiny gap needs to be eliminated.

My 2 cents.........Seems to me to be more of the switch being an issue.  Coming off of a curve going to a switch can be problamatic occasionally.

Looking at the switch without the engine it looks like the inside switching rail needs to be slightly bent closer to the inside rail or filed slightly to be pointed more evenly with the inside rail..........or........... the switch might have some debris or obstruction that is now keeping it from fully closing. ( from the top photo of the switch ,it seems to be a pretty good scrape mark on the tie from the inside switch rail )

Good luck with this .  Keep us updated.

Slightly bending and filing points' tips are part of what I've done to eliminate the gaps between the rails and points.  Some times there is also excess plastic flashing inside the switchstand roadbed extension that limits the travel of the sliding grey plastic rack gear that rotates the flag/lantern.

Here are some pics of modified points and a switch:

Since these modifications require access to the bottom of the switch, that's why I recommend starting with the wheel gauge first.

Wheel gauge is 1.2 inches. I tried doing some filing, but I will admit I'm a little timid. Which side do I file? How much can I bend the tip before I ruin this switch? So far, any attempts I have made to modify the switch have failed.

New update!!! I looked very closely between the inside switch and the rail and found the smallest piece of ballast wedged in there...picked it out...and whammo...problem fixed. Thank you, guys. You helped immensely and got me to stop focusing on the locomotive.

@Piedmont Central RR, glad to have a "and they lived happily ever after" ending to your saga!

This is where it was...one tiny piece of ballast.

Back to normal.

@Piedmont Central RR posted:

This is where it was...one tiny piece of ballast.

@Piedmont Central RR posted:

Back to normal.

YAY.......one more mystery solved.   Good to be  'back on track.'

I'm glad it was an easy fix.