Huh, I have a crossing gate with a busted cam. But never could identify which one. Apparently there are two different cams and I could never identify which cam was the proper replacement part. It's definitely pre modern era as I know the source of the gate.The core of the solenoid is plastic. If the coil overheats, it will expand, jamming the plunger. If that happens, remove the plunger and get a twist drill the size of the plunger and ''drill out" by hand the coil so the plunger is free to slide again.