loco-info.com
The reference for locomotives and railcars
Navigation
Random
Search
Compare
Settings

Navigation

Page views since 2023-01-26: 310053
Southern Pacific class S-12
United States | 1919 | 38 produced
No. 1261 in April 1956 in Fresno, California
No. 1261 in April 1956 in Fresno, California
J.A. Strapac Collection
No. 137 on a works photo
No. 137 on a works photo
Baldwin / collection Taylor Rush

After some 0-6-0 switchers, which the Southern Pacific had received from several manufacturers, they built more in their own shops. Six of the class, designated S-12, were built between 1919 and 1921 in Los Angeles and 32 in Sacramento. At least some of the locomotives were oil-fired, as the technical data shows. Their service ended between 1949 and 1952.

General
Built1919-1923
ManufacturerLos Angeles, Sacramento
Axle config0-6-0 (Six-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Service weight153,000 lbs
Adhesive weight153,000 lbs
Total weight291,100 lbs
Axle load38,250 lbs
Water capacity7,000 us gal
Fuel capacity2,940 us gal (oil)
Power
Power sourcesteam
Starting effort31,018 lbf
Power Plant
Driver diameter57 in
Boiler pressure200 psi
Expansion typesimple
Cylinderstwo, 20 x 26 in
Boiler
Calculated Values
steam locomotive
switcher
last changed: 11/2023
loading...

We use cookies to save the following settings:

  • selected navigation structure
  • selected language
  • preferred units
  • spelling of railway company names

If you refuse the use of cookies, the settings will only be retained for the current session and will be reset to the default values the next time you visit the site.

Display of units

Here you can set the desired unit system for the technical data.

  • Metric: Lengths in meters, weights in tonnes, and volumes in cubic meters
  • Imperial (UK): Lengths in feet/inches, weights in long tons and volumes in imperial gallons
  • Imperial (US): Lengths in feet/inches, weights in pounds, and volumes in US gallons
  • Individual: Depends on the country of origin of each locomotive
Operator names

Here you can set the display of railway company names.

  • Short: Abbreviation or short form of the name
  • Standard: commonly used name, partially translated to English
  • Complete: full name in local language