EMD SD40-2

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EMD SD40-2
Montana Rail Link XDM SD40-2 diesel locomotive 250 at Everett, Washington, United States, January 1994
Type and origin Power type Diesel-electric Builder GM Electro-Motive Division (EMD) General Motors Diesel (GMD) Material y Construcciones S.A. (MACOSA) Equipamentos Villares S.A. (EVSA) Model SD40-2 Build date January 1972 – October 1989 Total produced 3,982
Specifications Configuration: ​  • AAR C-C  • UIC Co′Co′  • Commonwealth Co-Co Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge 5 ft 3 in (1,600 mm), Brazil 1,000 mm (3 ft 3+3⁄8 in) metre gauge, Guinea and Brazil Driver dia. 40 in (1,016 mm) Wheelbase 43 ft 6 in (13.26 m) between bolsters; 13 ft 7 in (4.14 m) between axles in each truck Length 68 ft 10 in (20.98 m) over the coupler pulling faces Width 10 ft 3+1⁄8 in (3.13 m) over the grabirons Height 15 ft 7+1⁄8 in (4.75 m) Loco weight 368,000 lb (167,000 kilograms) or 184 short tons (164 long tons; 167 t) Fuel type Diesel Fuel capacity 3,200–4,000 US gal (12,000–15,000 L; 2,700–3,300 imp gal) Prime mover EMD 16-645E3 Engine type V16 diesel engine Aspiration turbocharged Cylinders 16
Performance figures Maximum speed 65 mph (105 km/h) Power output 3,000 hp (2,240 kW) Tractive effort Starting: 115,000 lbf (52,163 kgf) @31.5% Continuous: 82,100 lbf (37,240 kgf) @11 mph (18 km/h)
Career Operators Various Locale North America, Mexico, Brazil, Guinea, Mauritania

The EMD SD40-2 is a 3,000-horsepower (2,200 kW) C-C diesel-electric locomotive built by EMD from 1972 to 1989.

The SD40-2 was introduced in January 1972 as part of EMD's Dash 2 series, competing against the GE U30C and the ALCO Century 630. Although higher-horsepower locomotives were available, including EMD's own SD45-2, the reliability and versatility of the 3,000-horsepower (2,200 kW) SD40-2 made it one of the best-selling models in EMD's history, edged out only by the GP9, and was 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 similar to those of the experimental DDA40X.

Peak production of the SD40-2 was in the mid-1970s. Sales of the SD40-2 began to diminish after 1981 due to the oil crisis, increased competition from GE's Dash-7 series and the introduction of the EMD SD50, which was available concurrently to late SD40-2 production. The last SD40-2 delivered to a United States railroad was built in July 1984, with production continuing for railroads in Canada until 1988, Mexico until February 1986, and Brazil until October 1989.

The SD40-2 has seen service in Canada, Mexico, Brazil and Guinea. To suit export country specifications, General Motors designed the JT26CW-SS (British Rail Class 59) for Great Britain, the GT26CW-2 for Yugoslavia, South Korea, Iran, Morocco, Peru and Pakistan, while the GT26CU-2 went to Zimbabwe and Brazil. Various customizations led Algeria to receive their version of a SD40-2, known as GT26HCW-2.