Union Pacific No. 2537

Union Pacific No. 2537
Railway(s)	Oregon Short Line Railway (Union Pacific Owned)
Status	On Static Display
Location	Walla Walla, Washington.
Technical specifications
Type	2-8-2 "Mikado"
Serial number(s)	60237
Manufacturer(s)	American Locomotive Company (Schenectady Works)
Build date	December 1918
Rebuilder	UP
Rebuilt	Early 1940's or so
Classification	MK-Special (MK-63)
Model	USRA Light Mikado
Wheel arrangement	2-8-2
Dia. of Drivers	63"
Weight	484,300 Lbs. (Both engine and tender)
Rail gauge	4 Feet 8 1/2 Inches (Standard gauge)
Valve gear	Walschaerts
Valves	14"
Cylinders	26" x 30"
Boiler type	Wagon Top (Extended)
Boiler diameter	78" (First sheet) 90" (Last sheet in front of Firebox)
Boiler pressure	200 Lbs. PSI.
Superheater	Schmidt
Firegrate area	66.7 Sq ft.
Fuel type	Coal
Fuel capacity	16 Tons of Coal 10,000 Gallons of Water
Braking	Westinghouse
Performance figures
Maximum speed	65 Miles per hour (Design speed Maximum)
Tractive effort	54,724 Lbs. TE.
Service information
Entered service	by January 1919.
Operator(s)	Oregon Short Line Railway Union Pacific Railroad
Running numbers	UP/OSL #2537
Nickname(s)	"Mikado" "MacArthur"
Liveries	All black with Aluminum enameled rods, lettering/numbering, Graphite grey Smokebox and Firebox. Red valves and knobs.
Disposition details
Retired	July 1959
Preserved	Walla Walla, Washington.

Union Pacific No. 2537 is a class MK-7 2-8-2 "Mikado" type steam locomotive that was originally built for the Union Pacific Railroad as 2482 by the American Locomotive Company's Schenectady Works in December 1918.

History and Background

Primarily used in freight service with all other members of the Class, #2537 was part of an order for twenty USRA Light Mikado's built in 1918 to 1919 (Numbered #2535 to #2554) for the Union Pacific Railroad's Oregon Short Line Railway. All were built with Type D Duplex Mechanical stokers and were Coal-Fired. A well-liked design on the UP, they all remained in service until after World War II as the #2537 made it's last run around 1956 when it was put into storage as Diesel power came on scene. In July 1959, the No. 2537 was donated to the City of Walla Walla, Washington and placed on static display in Jefferson Park along with a Class CA-13 Rock Island bay window caboose where the two have remained on static display ever since.

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