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.
Hornby OO Gauge 4-Wheel Rail Track Maintenance Department Coach Yellow & Black
Locomotive Wheel Cleaner Model Railway Train Wheel Cleaning Loco Track Powered
NCB - SOLWAY COLLIERY - 4 WHEEL BATTERY LOCO. - "NO. 3" - PHOTO #F2114
Peco Model Train Servicing Set. Lift, Cradle ,scrapper And Wheel Brush Ref GC12
Woodland Scenics TT4561 HO Gauge Tidy Track Roto Wheel Cleaner Maintenance Boxed