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EMD SD40
Southern Pacific 7342, an SD40R, in 1980
Type and origin Power type Diesel-electric Builder GMElectro-Motive Division (EMD) General Motors Diesel (GMD) Model SD40 Build date January 1966 – August 1972 Total produced 1,268
Specifications Configuration: ​  • AAR C-C Gauge 4 ft 8+1⁄2 in (1,435 mm)standard gauge 5 ft 3 in (1,600 mm), Brazil Driver dia. 40 in (1,016 mm) diameter Length 65 ft 8 in (20.02 m) over thecoupler pulling faces;65 feet9+1⁄2 inches (20.053 m) on some units starting early 1968. Width 10 ft 0 in (3.05 m) Height 15 ft5+1⁄4 in (4.71 m) Loco weight 360,000 lb (160 t) Fuel capacity 3,200 US gal (12,000 L; 2,700 imp gal) Lubricant cap. 243 US gal (920 L; 202 imp gal) Coolant cap. 295 US gal (1,120 L; 246 imp gal) Sandbox cap. 56 cu ft (1.6 m3) Prime mover EMD16-645E3 Engine type V16diesel Aspiration turbocharged Alternator main : AR-10 auxiliary : D14 Generator (?) Traction motors D-77 Cylinders 16 Loco brake Independent air\ optional:dynamic brakes Train brakes Air, schedule 26-L
Performance figures Maximum speed 83 mph (134 km/h) Power output 3,000 hp (2,240 kW)
Career Locale North America South America Africa

TheEMD SD40 is anAmerican 6-axlediesel-electric locomotive built byGeneral Motors Electro-Motive Division between January 1966 and August 1972. 1,268 locomotives were built between 1966 and 1972. In 1972, an improved version with new electronics was developed and marketed as a new locomotive, theSD40-2.

Like its predecessor in EMD's catalog, theSD35, the SD40 is a high-horsepower, six-axle freight locomotive. The SD40 is a member of EMD's long-runningSpecialDuty class of locomotives, which all are built with 6 axles.

In 1966,EMD updated its locomotive catalog with entirely new models, all powered by the new645 diesel engine. These included six-axle modelsSD38, SD40,SDP40 andSD45. All shared standardized components, including the frame,cab,generator,trucks,traction motors, andair brakes. The primary difference was the power output: SD38 = 2,000 hp (1,490 kW) from a non-turbochargedV16, SD40 = 3,000 hp (2,240 kW) from a turbochargedV16, and SD45 = 3,600 hp (2,680 kW) from a turbochargedV20.

856 examples of this locomotive model were built forAmerican railroads, 330 were built forCanadian railroads, 72 were built forMexican railroads, 6 were built for theGuinea-Boke Project, and 4 SD40Ms riding on5 ft 3 in (1,600 mm) gauge trucks were exported to Brazil. They were manufactured atMcCook, Illinois.

Built by GMD atLondon, Ontario

Mexican SD40's Built by EMD atMcCook, Illinois or GMD atLondon, Ontario

Phases are as listed by Robert Sarberenyi.^{[citation needed]}

The very first test bed SD40, EMD 434, constructed on anSD35 frame in July 1964 was in active service until retired byCanadian National Railway in March 2009 and donated to theMonticello Railway Museum in July 2009, albeit having been upgraded to an "SD40-2R", asIllinois Central 6071.

18 customized SD40s were built for theIllinois Central Railroad as modelSD40A, using the longerSDP45 frame, which allowed for a larger 5,000 gallon fuel tank.

Versions of the SD40 modified for theAustralian loading gauge were sold toWAGR andVictorian Railways as theirL andC classes respectively.

The SD40 was succeeded by an upgradedDash 2 version called theSD40-2.

After having been succeeded by the more modern SD40-2, a large number of SD40 have been upgraded with more modern equipment. The main difference between rebuilt SD40 and genuine SD40-2 is that the latter use a longer frame and has longer front and rear porches, while the rebuilt SD40 have a shorter frame.

A common product of rebuilding SD40s, and sometimes SD40-2s, is anSD40-3. The major addition denotes that the rebuilt unit or units as an SD40-3 is the addition of a micro-processor, and sometimes other modern components. The usual reasons for installing a micro-processor are improved traction control, and better fuel economy (via better injection control). Also, electronic control over braking systems (independent and automatic). This may include some SD39, SD45 and SD45-2 rebuilt to SD40-2 standards.

TheSD40R is a rebuilt of all theSouthern Pacific's SD40 between 1980 and 1981.^[1]

30 SD40 units have been rebuilt asSD40M-2 by Morrison Knudsen for Southern Pacific, alongside 97 SD45s and 6SDP45s.^[2]

TheSD40-2XR designates 15 SD40 and a SDP40 rebuilt to Dash-2 standards forMontana Rail Link.^{[3][better source needed][4]}

TheSD40E is anSD50 rebuilt by theNorfolk Southern Railway and derated to 3000 HP (equivalent to anSD40-2).

• Ex-Canadian National SD40 #5232 (built November 1971) has been purchased by The Vintage Locomotive Society on January 10, 2015, fromCando and theCentral Manitoba Railway. It is being used for revenue service by Prairie Rail Solutions, a wholly owned subsidiary of the Society. The unit has been repainted completely black, with Prairie Rail Solutions lettering and logos. It is VLSX 5232.

• Canadian Pacific SD40 #5500 is preserved at the Revelstoke Railway Museum inRevelstoke, BC. It was CP's first SD40, built in 1966 at GMD'sLondon plant and was retired in 2001. The unit was donated to the museum in 2007. Plans are being made to restore the locomotive to its original look as it was when ordered, including a repaint into its original grey/tuscan red paint scheme, known as the Canadian Pacific "Script".

•Chesapeake and Ohio #7534 has been donated by CSX Transportation to the C&O Historical Society in Clifton Forge, Virginia. This engine is well known in the railroad enthusiast community as it ran on CSX right up to the late-2000s still wearing some of it original C&O paint and lettering, and was the very last SD40 on CSX's roster. The engine was meant to be used on the Buckingham Branch Railroad, which also operates out of Clifton Forge, however the unit spends quite a bit of time at the Historical Society's museum.

•Illinois Central SD40-2R #6071, the first SD40 built, is preserved at the Monticello Railway Museum in Monticello, Illinois. It was originally EMD demonstrator #434. It was sold to the Gulf Mobile & Ohio and it became GM&O #950. The GM&O was later merged into the Illinois Central Railroad and became Illinois Central Gulf #6071, then later rebuilt into an SD40-2R for the IC. It was donated March 11, 2009. The engine is fully functional, however it needs new traction motors if it were to operate again.

•Kansas City Southern de México SD40 1343 (as PRLX 3066) is owned by the Coastal Pines Technical College in Waycross, Georgia and is used to train kids that are looking to work for CSX

•Louisville and Nashville #1230 is owned by theTennessee Valley Railroad Museum but will be put to work on the museum's for-profit subsidiary, the Tyner Terminal Railroad, switching theVolkswagen plant. It will eventually be restored to one of its earlier L&N liveries.^[5]

• Ex-Santa Fe #5007 (built 1966 as ATSF 1707) is preserved at theWestern America Railroad Museum inBarstow, California. It's currently numbered GN 6307, after being donated to the museum byBNSF.^[6]

•Santa Fe #5008 (built 1966 as ATSF 1708) ispreserved at theWalt Disney Hometown Museum inMarceline, Missouri.

In mid December, 2014, it was revealed that Norfolk Southern had set aside two SD40 units, that were retired in 2007, for preservation:

• NS SD40 #1580, built for theNorfolk and Western, was donated to the Roanoke Chapter NRHS on 3/25/24.
• NS SD40 #3170, built asSouthern #3170, the first SD40 bought by theSouthern. It was restored to operating condition at theJuniata Shops inAltoona, Pennsylvania, and then sent to theNS Paint shops at the Debutts Yard inChattanooga, Tennessee, where it made its public debut February 27, 2015. It operated on theNS Coastal Division. On May 18, 2016, it was donated to theTennessee Valley Railroad Museum byNorfolk Southern.^[7]

•Union Pacific #7362 (built 1966 as SP #8475) is used onNorth Platte Community College's North Campus as a training locomotive.^[8]

• Western Maryland #7471 is owned by Precision Locomotive Leasing and currently leased to theSteam Railroading Institute inOwosso, Michigan.

• List of EMD locomotives
• List of GMD Locomotives

• Pinkepank, Jerry A. (1973).The Second Diesel Spotter's Guide. Milwaukee, Wisconsin:Kalmbach Publishing.ISBN 978-0-89024-026-7.
• Sarberenyi, Robert.EMD SD40, SD40A, and SDP40 Original Owners. Retrieved on December 19, 2009
• Eck, H. C., The Modern Locomotive Handbook, 1977
• Service Department (1966). SD40 - SDP40 Operator's Manual. La Grange, IL: Electro-Motive Division of General Motors Corporation

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