EMD SD40-2
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 Montana Rail Link XDM SD40-2 diesel locomotive #250 at Everett, Washington, USA, January 1994. |
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| Power type | Diesel-electric |
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| Service class | Locomotive |
| Builder | General Motors Electro-Motive Division (GM-EMD) |
| Model | SD40-2 |
| Build date | January 1972 – February 1986 |
| Total production | 3,957 |
| AAR wheel arr. | C-C |
| UIC classification | Co'Co' |
| Gauge | 4 ft 8½ in (1,435 mm) |
| Driver size | 40 in (1.02 m) diameter |
| Wheelbase | 43 ft 6 in (13.3 m) between bolsters; 13 ft 7 in (4.1 m) between axles in each truck |
| Length | 68 ft 10 in (21.0 m) over the coupler pulling faces |
| Width | 10 ft 3⅛ in (3.13 m) over the grabirons |
| Height | 15 ft 7⅛ in (4.75 m) |
| Total weight | 368,000 lb (167,000 kg) |
| Fuel capacity | 3,200-4,000 US gal (12,100-15,100 L) |
| Prime mover | EMD 16-645-E3 |
| Aspiration | turbocharged |
| Cylinders | V16 |
| Power output | 3,000 hp (2,240 kW) |
| Locomotive brakes | Straight air |
| Train brakes | 26-L air |
| WikiProject Trains {{Infobox Locomotive Auto}} |
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The EMD SD40-2 is a 3,000 horsepower (2,240 kW) model of C-C diesel-electric locomotive built by General Motors' Electro-Motive Division between January 1972 and February 1986; 3,957 examples were built, and most larger North American railroads have operated the type. Part of the EMD Dash 2 line, the SD40-2 was an upgraded SD40 with modular electronic control systems, HT-C trucks, and many other detail improvements. The SD40-2 is one of the best-selling diesel locomotive models of all time. BNSF, Union Pacific and Canadian Pacific operate some of the largest fleets of the type.
The SD40-2 was not the most powerful locomotive type even when introduced; EMD's SD45 and SD45-2 delivered 3,600 hp (2,680 kW), as did GE Transportation Systems' U36B/C and ALCO's C636. However, the SD40-2 was significantly more reliable and economical than the higher-powered units, the latter becoming increasingly important with the oil crises of the 1970s.
The British Rail Class 59 was derived from the SD40-2.
Three cabless SD40-2Bs were also rebuilt from standard SD40-2s by the Burlington Northern Railroad in the early 1980s. The units had been in collisions and it was decided that it was cheaper to rebuild them without cabs. Canadian Pacific also owns a few SD40-2Bs. These were created by welding metal plates over the cab windows of may of its ex Norfolk Southern and some of its original SD40-2s.
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[edit] Appearance and spotting features
Just as the SD38, SD40, and SD45 shared a common frame, so too did the SD38-2, SD40-2, and SD45-2. It was 3 ft (0.91 m) longer than the previous models, giving an overall locomotive length of 68 ft 10 in (21.0 m) over the coupler pulling faces. The SD38-2 and SD40-2 shared the same basic superstructure, since they both used the same 16-645E3 engine (in naturally aspirated and turbocharged form respectively); the long hood was 18 inches (46 cm) longer than the SD38 and SD40, but since the increase in frame length was even greater, the SD38-2 and SD40-2 were left with even larger front and rear "porches" than the earlier models. These empty areas at front and rear are distinctive spotting features to identify the Dash 2 models of both units. The SD40-2 can be distinguished from the SD38-2 by having three roof-mounted radiator fans instead of two. Another distinguishing feature of the SD40-2 as compared to the SD40 is the SD40-2's trucks (HT-C truck), which have shock absorbers on the outside of middle axle. However, this is not true of the former Conrail SD40-2s. After a rash of derailments involving Amtrak SDP40F units that were equipped with HT-C trucks, Conrail ordered the SD40-2 units and several orders of SD50s with the older flexicoil trucks.
[edit] Additional specifications
| Main generator: | AR10 alternator |
|---|---|
| Traction motors: | 6 × D77/78 DC |
| Standard gearing: | 62:15 |
[edit] Original Owners
| American SD40-2 orders | |||
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| Railroad | Quantity | Road numbers | Notes |
| Atchison, Topeka and Santa Fe Railway | 187 | 5020-5192, 5200-5213 | Most now in service with BNSF Railway |
| Burlington Northern Railroad | 779 | 900-925, 930-961, 980, 996, 6325-6385, 6700-6799, 6824-6836, 6917-6928, 7000-7291, 7832-7940, 8000-8181 | |
| Baltimore and Ohio Railroad | 20 | 7600-7619 | Now in service with CSX Transportation |
| Chicago and North Western Railway | 135 | 6801-6935 | Most now in service with Union Pacific Railroad |
| Conrail | 167 | 6358-6524 | Equipped with flexicoil trucks |
| Clinchfield Railroad | 5 | 8127-8132 | Now in service with CSX Transportation |
| Illinois Central Gulf Railroad | 4 | 6030-6033 | 6031 was converted into 6200, 6033 was destroyed in a collision in Flora, Mississippi on February 6, 1994 |
| Kennecott Utah Copper Corporation | 7 | 101-107 | |
| Kansas City Southern Railway | 46 | 637-692 | 637 was first EMD SD40-2 built |
| Louisville and Nashville Railroad | 191 | 1259-1278, 3554-3612, 8000-8039, 8067-8086, 8095-8126, 8133-8162 | Now in service with CSX Transportation |
| Milwaukee Road | 90 | 21-30, 171-209, 3000-3040 | |
| Missouri-Kansas-Texas Railroad | 37 | 600-636 | Most now in service with Union Pacific Railroad |
| Missouri Pacific Railroad | 306 | 790-838, 3139-3321, 6020-6073 | Most without dynamic brakes, some still in service with Union Pacific Railroad |
| Norfolk and Western Railway | 162 | 1625-1652, 6073-6207 | Some are High hood units |
| Oneida and Western Railroad | 8 | 9950-9957 | Later became BC Rail 743-750, 749 is now GECX 749 |
| Chicago, Rock Island and Pacific Railroad | 10 | 4790-4799 | Later became Illinois Central Gulf 6040-6049. Six are in in service with Wisconsin and Southern Railroad |
| Seaboard Coast Line Railroad | 54 | 8040-8066, 8087-8094, 8133-8161 | Now in service with CSX Transportation |
| St. Louis-San Francisco Railway | 8 | 950-957 | |
| Soo Line Railroad | 57 | 757-789, 6600-6623 | |
| Southern Railway | 128 | 3201-3328 | High hood units; now in service with Norfolk Southern Railway |
| Union Pacific Railroad | 686 | 3123-3239, 3243-3304, 3335-3399, 3410-3583, 3609-3808, 8000-8002, 8035-8099 | |
| Canadian SD40-2 orders | |||
| Railroad | Quantity | Road numbers | Notes |
| Algoma Central Railway | 6 | 183-188 | |
| BC Rail | 17 | 751-767 | |
| Canadian Pacific Railway | 484 | 5560, 5565-5879, 5900-6069 | |
| Canadian National Railway | 123 | 5241-5363 | These units had the Canadian Safety Cab with 4 windows and were classified as SD40-2W |
| Ontario Northland Railway | 8 | 1730-1737 | |
| Quebec, North Shore and Labrador Railroad | 44 | 221-264 | |
| Export SD40-2 orders | |||
| Railroad | Quantity | Road numbers | Notes |
| Boke Project (Guinea) | 3 | 107-109 | |
| Ferrocarriles Unidos del Sureste (Mexico) | 4 | 601-604 | |
| Ferrocarriles Nacionales de México | 103 | 8700-8798, 13001-13004 | |
| British Rail Class 59 (United Kingdom) Operated by Mendip Rail and English, Welsh & Scottish Railway | 15 | 59001 - 005, 59101-104, 59201-206 | European export version of the SD40-2 with two cabs, known as the JT26CWR-SS |
[edit] Rebuilds
A number of SD40-2s have been rebuilt into other models. Some of the oddest are the narrow gauge BB40-2s.
Conversely, several other models of EMD locomotive have sometimes been rebuilt to SD40-2 standards, including the SD40, SD45 and SD45-2.
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