Track Cleaner Locomotive - Stewart F7A, Non-Powered -- Pennsylvania

These track cleaners, disguised as locomotives, are made to run up front and remove grime before powered units run over it. Four independent, spring-loaded cleaning feet are built into the fuel tank and can be fitted with any combination of abrasive or felt disks, which ride the rail to remove oxidation, grime and dirt. Cleaning feet are slightly inward of the rail center to force some rotation as the cleaner encounters curves, so the whole disk is used, rather than simply wearing down the same point. There are no liquids and the Stealth system can be used any time you run trains.