Published: 28-01-2015 photo #22337 0 comments 0 votes
Photographed on the approach to Chicago on 19 September 2014. Built as CN (Canadian National Railway) no. 5100 in 1969.
SD means Special Duties. The SD40-3 is a rebuilt form of the SD40-2, designed to upgrade and extend their service lifespan. They were rebuilt in programs conducted by individual railroads. Typical improvements were modified cabs to better withstand crashes, new heating and air-conditioning systems, as well as a newer control stand, including visual displays, a modern WABCO braking controller, and modernized starting systems. The engines retain the original 3,000 horsepower (2,240 kW) rating, with rated tractive power increased to 130,000 lb (58,970 kg) from the former 86,000 lb (39,010 kg) rating.