The SD45 is a six-axle diesel-electric locomotive built by General Motors Electro-Motive Division between 1965 and 1971. It has an EMD 645E3 twenty-cylinder engine generating 3,600 hp (2,680 kW) on the same frame as the SD38, SD39, SD40, and SDP40. As of 2022, most SD45s have been retired, scrapped or rebuilt to SD40-2 standards.

EMD SD45
Great Northern 400 in service at the Minnesota Transportation Museum
Type and origin Power type Diesel Builder General Motors Electro-Motive Division (EMD) Model SD45 Build date Dec. 1965 – Dec. 1971 Total produced 1,260
Specifications Configuration: ​  • AAR C-C Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Length 65 feet 8 inches (20.02 m); 65 feet 9+1⁄2 inches (20.053 m) on some units starting early 1968. Loco weight 368,000 pounds (167,000 kg) Prime mover EMD 645E3 Engine type V20 diesel Generator AR10B Cylinders 20
Performance figures Maximum speed 71 miles per hour (114 km/h) Power output 3,600 hp (2,680 kW) Tractive effort Starting: 92,000 lbf (410 kN) Continuous: 82,100 lbf (365 kN) @ 11 mph (18 km/h)
[1][2]

Design

1,260 were built for American railroads before the SD45-2 replaced it in 1972, along with the related SD45T-2 'Tunnel Motor'.

SD45s had several teething problems. Reliability was not as high as anticipated; the twenty-cylinder prime mover was prone to crankshaft failure from engine block flex. Though it produced 600 horsepower (450 kW) more than the 16-645E3 in the SD40, some railroads felt the extra horsepower wasn't worth it, even after EMD strengthened the block to eliminate crankshaft failures. At low speeds, when tractive effort was adhesion-limited, the SD45 provided no advantage over the SD40.

Buyers included the Burlington Northern, Southern Pacific, Santa Fe, Pennsylvania Railroad, the Great Northern Railway, Union Pacific and the Northern Pacific Railway. Many SD45s still exist, some rebuilt with sixteen-cylinder 645s for lease companies. SD45s and SD45-2s owned by Montana Rail Link retain their 20-cylinder prime movers. Wisconsin Central used to roster a large fleet of SD45s, but its sale to CN has resulted in the retirement of the entire fleet, with mass scrappings. Montana Rail Link is also starting to sell some for scrap.

Original owners

Preservation

• Great Northern 400, named "Hustle Muscle", was the first production SD45. It is preserved by the Great Northern Railway Historical Society, based out of Saint Paul, Minnesota. It was in active service on the Minnesota Transportation Museum's Osceola and St. Croix Valley Railway until it suffered a crankshaft failure in its original 20-645E3 engine, requiring a replacement engine to be installed. BNSF Railway overhauled a 20-645E3 engine from a retired ex-ATSF SD45-2 and donated and installed the new engine in January 2019.^{[citation needed]}
• Erie Lackawanna No. 3607 is preserved at the St. Louis National Museum of Transportation. Restored to EL colors, this unit is a static display.
• Norfolk and Western No. 1776, a high-hood unit, is a static display at the Virginia Museum of Transportation.
• Northern Pacific 3617 is preserved at the Lake Superior Railroad Museum. It has been restored to active service.[3][4]

  

• Seaboard Coast Line No. 2024 is preserved at the Southern Appalachia Railway Museum[5] and is currently painted in the Clinchfield Railroad scheme as of December 2017. [6]
• Southern Pacific No. 7457 is a static display at the Utah State Railroad Museum.
• Wisconsin Central No. 7525 is at the Illinois Railway Museum and is operable. It is one of two WC SD45 units to be painted in an Operation Lifesaver scheme.
• Kansas City Southern No. 1200 is at the Rail Museum of Heroica Matamoros in Matamoros, Mexico on static display

References

Sources

• Foster, Gerald L. (1996). A Field Guide to Trains of North America. Boston: Houghton Mifflin. ISBN 0-3957-0112-0.
• Pinkepank, Jerry. Diesel Spotters Guide 2.
• Solomon, Brian (2014). GE and EMD Locomotives: The Illustrated History. Minneapolis, Minnesota: Voyageur Press. ISBN 978-0-7603-4612-9.
• Diesel Spotter's Guide, Volume 2. Kalmbach, 1994.
• White, Dr. W. J. How Diesel Electric Locomotives Operate. Peat. 1998.

External links

Wikimedia Commons has media related to EMD SD45 locomotives.

• EMD SD45 Original Owners

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