Union Pacific Class S-6

Union Pacific Class S-6
Technical specifications
Manufacturer(s)	Lima Locomotive Works
Build date	1920
Classification	S-6
Rail gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Valve gear	Walschaerts
Cylinders	Two, outside
Boiler pressure	180 psi (1,200 kPa)
Bore stroke	21 in × 26 in (530 mm × 660 mm)
Fuel type	Coal
Performance figures
Tractive effort	34,400 lbf (153,000 N), 78,000 lbf (350,000 N) with booster
Service information
Running numbers	4451-4480
Disposition details
Preserved	Nos. 4455 and 4466
Disposition	Two preserved, remainder scrapped

The Union Pacific Class S-6 was a class of 0-6-0 switcher type steam locomotives built by the Lima Locomotive Works for the Union Pacific Railroad.

History

In the 1920s, the Union Pacific Railroad decided that, what they needed was more shop switchers for switching service in Cheyenne, Wyoming. So the Lima Locomotive Works, who was insisted of the idea, had went back to the drawing board, drew up plans for this new type of steam shop switchers, constructed the steam shop switchers, and delivered the new switcher steam locomotives to the Union Pacific Railroad, which these engines were known as the Union Pacific Class S-6. they were in-fact, the UP Cheyenne Shop's last steam shop switchers built and delivered to the Union Pacific Railroad.

Withdrawal of the Class had occurred the 1960s, but not all of them were scrapped, two examples have survived into preservation. Those said examples were Nos. 4455 and 4466. With 4466 being restored to operating condition and retired again in 1999 and placed on static display at the California State Railroad Museum in Sacramento, California, and 4455 was retired from active service and placed on static display at the Colorado Railroad Museum in Golden, Colorado.

Accidents and incidents

• No. 4476 had derailed and had wrecked itself on March 7, 1947, at Grand Island, Nebraska, it was deemed "Damaged beyond repair", retired in April 1947 and was scrapped.

Stock list

Image	Loco No.	Build date	Status	Notes
File:UP 4452.jpg	4452	1920	Scrapped	-
File:20dcaa1bdde2f1efdc8f667cb54c3e78.jpg	4453	1920	Unknown	-
File:20dcaa1bdde2f1efdc8f667cb54c3e78.jpg	4454	1920	Unknown	-
	4455	1920	On static display at the Colorado Railroad Museum in Golden, Colorado.	-
File:UP 4456.jpg	4456	1920	Scrapped	-
File:Be7df7fff121142da4f3ea372d19b9b2.jpg	4459	1920	Scrapped	-
	4466	October 1920	On static display at the California State Railroad Museum in Sacramento, California.	Restored to operating condition until 1999, when new California emissions regulations had banned the use of coal-fired steam locomotives in operation, which caused it to be placed on static display at California State Railroad Museum in Sacramento, California.
	4471	-	Scrapped	-
-	4476	-	Scrapped	Wrecked on March 7, 1947 at Grand Island, Nebraska; retired in April 1947 and scrapped.

Gallery

• Gallery