View source for EMD SD18

{{short description|Model of  1800 hp Co′Co′ American diesel locomotives}}
{{refimprove|date=July 2017}}
{{Infobox locomotive
| name = EMD SD18
| powertype = [[Diesel-electric]]
| image = CIM 60, 50, and 52 (SD9s) at engine house, Springfield, IL on May 7. 1966 (22254571698).jpg
| caption = Chicago and Illinois Midland Railway 60 coupled to two SD9 locomotives at [[Springfield, Illinois]], 7 May 1966
| aarwheels = C-C
| builder = [[Electro-Motive Diesel|General Motors Electro-Motive Division]] (EMD)
| buildmodel = SD18
| builddate = April 1960 &ndash; March 1963
| primemover = [[EMD 567]]
| enginetype = [[V16 engine|V16]] [[Diesel engine|diesel]]
| cylindercount = 16
| poweroutput = {{convert|1,800|hp|MW|abbr=on|lk=in}}
| totalproduction = 114
| gauge = {{track gauge|ussg|allk=on}}<br/>{{track gauge|5ft3in|lk=on}}, Brazil
}}
The '''EMD SD18''' is a 6-axle diesel [[locomotive]] built by [[Electro-Motive Diesel|General Motors Electro-Motive Division]] between April 1960 and March 1963.<ref name=":0">{{Cite book|last=Marre|first=Louis A.|url=https://www.worldcat.org/oclc/34531120|title=Diesel locomotives : the first 50 years : a guide to diesels built before 1972|date=1995|publisher=Kalmbach Pub. Co|isbn=0-89024-258-5|location=Waukesha, WI|pages=66–68|oclc=34531120}}</ref> Power was provided by an [[EMD 567D1]] 16-[[cylinder (engine)|cylinder]] engine which generated {{convert|1,800|hp|MW|abbr=on|lk=in}}.<ref name=":0" />

54 examples of this locomotive model were built for [[United States|American]] railroads,<ref name=":0" /> and 60 for export, including fifteen for [[Korail]] (order numbers 700735–700749, serial numbers 28373–28387).

== Design and Production ==
The SD18 was the third model in EMD's SD (special duty) line of locomotives. It was designed as a modified [[EMD GP18|GP18]] which had six axles instead of four. The additional axles allowed for more tractive effort and a more even distribution of weight compared to the GP18.<ref name=":0" />

== Original Owners ==
{| class="wikitable" style=text-align:center
! Owner
! Quantity
! Numbers
|- 
|[[Bessemer and Lake Erie Railroad]]
|7
|851–857<ref name=":0" />
|- 
|[[Chesapeake and Ohio Railway]]
|19
|1800–1818<ref name=":0" />
|- 
|[[Chicago and Illinois Midland Railway]]
|2
|60–61<ref name=":0" />
|- 
|[[Duluth, Missabe and Iron Range Railway]]
|19
|175–193<ref name=":0" />
|- 
|[[Reserve Mining Co.]]
|7
|1226–1232<ref name=":0" />
|- 
|[[RFFSA]] (export to Brazil)
|45
|3401–3445
|- 
|[[Korea National Railroad]]
|15
|6001–6015
|-
!Totals !! 114 !! 
|}

== Preservation ==
At least four SD18s have been preserved.

Chop-nosed [[Duluth, Missabe and Iron Range Railway|Duluth, Missabe & Iron Range]] 193 is now an operating member of the [[Lake Superior Railroad Museum]] collection. They also previously had DM&IR 316 in their collection, which is an "SDM"; an EMD SD18 given [[EMD 645]] power assemblies by the Missabe, though still labeled as an SD18.<ref>{{Cite web|title=Diesel Locomotives|url=https://lsrm.org/project/diesel-locomotives/|access-date=2021-08-07|website=Lake Superior Railroad Museum|language=en-US}}</ref> In 2019 #316 was traded for Northern Pacific #245 and left the museum for the Dakota Quality Grain Corporation in Parshall, N.D.

As of March 2022, grain terminal operator AgRail LLC of Bloomington, Illinois has acquired Western Rail Inc. SD18M No. 1229 through a lease-to-purchase agreement. The unit began service with Minnesota's Reserve Mining in May 1961 and was last used by the Western Milling plant in Goshen, CA. It was rewired in the 1980s.<ref>{{Cite web |last=Smedley |first=Steve |date=March 15, 2022 |title=Illinois grain facility acquires rare SD18M |url=https://www.trains.com/trn/news-reviews/news-wire/illinois-grain-facility-acquires-rare-sd18m/ |access-date=2022-03-17 |website=Trains}}</ref>

== References ==
{{Reflist}}
* {{Pinkepank diesel spotters guide 2}}

== External links ==
* {{commonscat-inline|EMD SD18 locomotives}}

{{EMD SDs}}
{{Korail rolling stock}}

[[Category:Electro-Motive Division locomotives|SD18]]
[[Category:C-C locomotives]]
[[Category:Diesel–electric locomotives of the United States]]
[[Category:Railway locomotives introduced in 1960]]
[[Category:Freight locomotives]]
[[Category:Standard-gauge locomotives of the United States]]
[[Category:Standard-gauge locomotives of South Korea]]
[[Category:Diesel–electric locomotives of South Korea]]
[[Category:Chesapeake and Ohio locomotives]]