Pick Up Rollers

Do they look like these?

I'm still running this 1948 diesel with these rollers. You probably need to clean the track, wheels, & maybe the rollers & pins.

As long as they are not binding; still have good spring action; spin freely and do not have a groove worn in them, they should not need to be replaced.

I would check the wiring to make sure you do not have a loose connection; lightly polish the rollers to get any grime build-up off ( a Dremel with a non-abrasive polishing/buffing wheel is good for this); make sure to clean both the engine wheels and the track rails before, after and on the switch; and lubricate the rollers with an electrically conductive oil (like Bachman's EZ Lube) and see if that helps.

EDIT: Written before seeing Rob's post - talk about grooves !

Thanks guys for your responses!  I just learned in the last few days that I have to be more diligent in cleaning the track and wheels of the engines,  Everything is running smoothly, so thankfully the solution was simple.

Thanks again!