EMD SD10

EMD SD10
Type and origin Power type Diesel-electric Builder General Motors Electro-Motive Division (EMD) Model SD10 Build date 1952 – 1953 (SD7), 1954 (SD9) Total produced 24 (SD7), 14 (SD9) Rebuilder Milwaukee Road's West Milwaukee shops Rebuild date March 1974 – January 1976 Number rebuilt 21
Specifications Configuration: ​  • AAR C-C  • UIC Co′Co′ Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Wheel diameter 40 in (1.016 m) Length 35 feet (11,000 mm; 420 in; 1,100 cm; 11 m) Fuel capacity 1,200 US gal (4,500 L; 1,000 imp gal) Sandbox cap. 50 cu ft (1.4 m3) Prime mover EMD 16-645E Generator EMD D12 Traction motors EMD D67/D77 Cylinders 16 Gear ratio 62:15
Performance figures Maximum speed 65 mph (105 km/h) Power output 1,800 hp (1,300 kW; 1.3 MW)
Career Operators Chicago, Milwaukee, St. Paul and Pacific Railroad Class 18-ERS-6 Numbers 532–534, 542–561 Locale North America
References:

The EMD SD10 were a six-axle 1,800 hp (1,300 kW; 1.3 MW) diesel locomotive, which was a rebuild from EMD SD7 and SD9 diesel locomotives. These units were rebuilt by the Chicago, Milwaukee, St. Paul and Pacific Railroad/Milwaukee Road between March 1974 and January 1976.

History

Between March 1974 and January 1976, the Chicago, Milwaukee, St. Paul and Pacific Railroad/Milwaukee Road had undertook a rebuilding program that involved rebuilding a total of 17 SD7 units and 4 SD9 units into 21 EMD SD10 units at the Milwaukee Road's West Milwaukee shops.

The Milwaukee Road rebuilt units specifically to be a six-axle variant of the four-axled GP10, which the GP10s were rebuilds of EMD GP7 and GP9 units.

The rebuild program involved replacing the original 16-cylinder 567B and 567C prime movers with more powerful 16-cylinder 645E prime movers, this changed the horsepower from 1,500 horsepower (1,100 kilowatts; 1.1 megawatts) and 1,750 horsepower (1,300 kilowatts; 1.30 megawatts) to 1,800 horsepower (1,300 kilowatts; 1.3 megawatts).

When the Milwaukee Road filed for bankruptcy in 1977, three units were passed onto the Soo Line Railroad, the Milwaukee Road's successor.

Preservation

One unit is preserved:

• Milwaukee Road SD10 #532 (formerly known as SD9 #532, SD9 #503 and SD9 #2226) is currently owned by the Whitewater Valley Scenic Railroad (WVSR) at Connersville, Indiana. It retains its original MILW paint scheme and number, it was donated to the WVSR.

Bibliography

• Marre, Louis A.; Pinkepank, Jerry A. (1989). The Contemporary Diesel Spotter's Guide. Kalmbach Books. p. 216. ISBN 978-0-89024-088-5.
• Goneau, Ralph (2004). Tourist Trains 2004. Kalmbach Publishing Company, Books Division. p. 111. ISBN 978-0-87116-207-6.

Further reading

• Danneman, Mike (2022-07-15). Illinois Railroads. Amberley Publishing Limited. ISBN 978-1-3981-0310-8.
• Glischinksi, Steve (2007). Regional Railroads of the Midwest. Voyageur Press. ISBN 978-1-61060-495-6.