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GM SD18 5022 MRS.jpg
MRS (ex-RFFSA) #5022, EMD SD18
Type and origin
Power type Diesel-electric
Builder General Motors Electro-Motive Division (EMD)
Model SD18
Build date April 1960 – March 1963
Total produced 114
AAR wheel arr. C-C
Gauge 4 ft 8 12 in (1,435 mm)
5 ft 3 in (1,600 mm), Brazil
Prime mover EMD 567D1
Cylinders V16
Performance figures
Power output 1,800 hp (1.3 MW)

An EMD SD18 is a 6-axle diesel locomotive built by General Motors Electro-Motive Division between April 1960 and March 1963. Power was provided by an EMD 567D1 16-cylinder engine which generated 1,800 hp (1.3 MW).

54 examples of this locomotive model were built for American railroads, and 60 for export, including 15 for Korail (Order#700735~700749, Serial#28373~28387).

Original Owners[edit]

Owner Quantity Numbers
Bessemer and Lake Erie Railroad 7 851-857
Chesapeake and Ohio Railway 19 1800–1818
Chicago and Illinois Midland Railway 2 60-61
Duluth, Missabe and Iron Range Railway 19 175-193
Reserve Mining Co. 7 1226–1232
RFFSA (export to Brazil) 45 3401-3445
Korea National Railroad 15 6001-6015


At least four SD18s have been preserved. Chop-nosed Duluth, Missabe & Iron Range 193 is now an operating member of the Lake Superior Railroad Museum collection. They also have DM&IR 316 in their collection, which is an "SDM"; an EMD SD18 given EMD 645 power assemblies by the Missabe. However, it is still labeled as an SD18.

The South Branch Valley Railroad also regularly operates former Bessemer & Lake Erie SD18 853 as their 182.

A fourth unit is Chesapeake and Ohio 7311, in Chessie System colors and with VLIX reporting marks. It was sold to a company in the State of Washington and is slated for a complete rebuild. As of now the unit has been running freights but should be rebuilt soon.This SD18 rides on Alco trucks.

Additionally, both SD18s owned by the Chicago & Illinois Midland are still in operation, and are used by the Illinois Midland Railroad, the successor to the CIM.


  • Pinkepank, Jerry A. (1973). The Second Diesel Spotter’s Guide. Milwaukee, WI: Kalmbach Publishing Company. ISBN 0-89024-026-4.