Athearn RTR 1226 HO Scale EMD SD40-2 Union Pacific UP 8072 DC Code 70 Low friction trucks with rotating

Low friction trucks with rotating bearing caps (2-Rail and 3-Rail)

Trailer Length: 19

Road numbers: 8117 and 8122

couplers and carriers were combined into a single steel casting

Athearn RTR 1226 HO Scale EMD SD40-2 Union Pacific UP 8072 DC Code 70 Low friction trucks with rotatingAthearn RTR 1226 HO Scale EMD SD40 2 Union Pacific UP 8072 DC The SD40 2 was introduced in January 1972 as part of EMDs Dash 2 series, responding to competing products from GE and ALCO. Reliability and versatility of the 3,000 horsepower SD40 2 made it the best selling model in EMDs history and the standard of the industry for several decades after its introduction. The SD40 2 was an improvement over the SD40, with modular electronic control systems