NEWUSED Screening Plants For Sale At . Used 1997 KOLBERG Model 271B Portable Screening Plant, SN: 251271B304097, 2,811 hours, powered by a John Diesel engine (new engine with less than 500 hours), feed hopper with tilting grizzly bars, 30" X 40' conveyor transfer belt, 4' X 10' Double Deck Incline Vibrating Screen with directional chutes on top and second deck, collection flume on ...