This second device is placed on a locomotive wheel that is on the opposite side. The wheels will start to turn andthe brushes (or scraper and brush) will remove the dirt from the wheels. Wheel scraper.
Wheel cleaning brush (loco maintenance) - PL-42
Loco Servicing Cradle (loco maintenance) N/OO-9/OO/HO Peco PL-70
Locomotive Wheel Cleaner Model Railway Train Wheel Cleaning Loco Track Powered
Electric Servicing Kit (loco maintenance) + track rubber Peco PL-71/41
NCB - SOLWAY COLLIERY - 4 WHEEL BATTERY LOCO. - "NO. 3" - PHOTO #F2114
Peco Model Train Servicing Set. Lift, Cradle ,scrapper And Wheel Brush Ref GC12