In 1910 the Central South African Railways

Central South African Railways

From 1902 to 1904, the area of power of Lieutenant-Colonel Sir Percy Girouard later also included the lines of The Netherlands-South African Railway Company; together this dominion covered all lines in the Transvaal that belonged to NZASM ....

 placed one American built Class 10 4-6-2

4-6-2

4-6-2, in the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels on two axles , six powered and coupled driving wheels on three axles, and two trailing wheels on one axle .These locomotives are also known as Pacifics...

 Pacific steam locomotive

Steam locomotive

A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...

 in service. When the South African Railways was established in 1912, this locomotive was renumbered and reclassified to the sole Class 10D.

Manufacturer

One 4-6-2 Pacific passenger locomotive was ordered by the Central South African Railways (CSAR) from the American Locomotive Company

American Locomotive Company

The American Locomotive Company, often shortened to ALCO or Alco , was a builder of railroad locomotives in the United States.-Early history:...

 (ALCO) in 1910. It was built to very much the same specifications as that of the CSAR Class 10-2 of that same year, designed by CSAR Chief Mechanical Engineer (CME) G.G. Elliot. The locomotive was superheated, with a Belpaire firebox

Belpaire firebox

The Belpaire firebox is a type of firebox used on steam locomotives. It was invented by Alfred Belpaire of Belgium. It has a greater surface area at the top of the firebox, improving heat transfer and steam production...

, Walschaerts valve gear and a bar frame. It was slightly more powerful than the Class 10-2 and was classified as Class 10 by the CSAR, with running number 1002.

Renumbering

With the establishment of the South African Railways in 1912, when the former Cape Government Railways

Cape Government Railways

The Cape Government Railways was the government-owned railway operator in the Cape Colony from 1874 until the creation of the South African Railways in 1910.-Private railways:...

 (CGR), Natal Government Railways

Natal government railways

The Natal Government Railways was formed in January 1877 in the Colony of Natal.In 1877 the Natal Government Railways acquired the Natal Railway Company for the sum of £40,000, gaining the line from the Point to Durban and from Durban to Umgeni...

 (NGR) and CSAR were amalgamated into one national carrier for the Union of South Africa

Union of South Africa

The Union of South Africa is the historic predecessor to the present-day Republic of South Africa. It came into being on 31 May 1910 with the unification of the previously separate colonies of the Cape, Natal, Transvaal and the Orange Free State...

, their locomotives were reclassified and renumbered on the SAR roster. The other fifteen CSAR Class 10

South African Class 10 4-6-2

In 1904 the Central South African Railways placed fifteen Class 10 steam locomotives with a 4-6-2 Pacific wheel arrangement in service. In 1912, when they were assimilated into the South African Railways, they were renumbered but retained their Class 10 classification.-Manufacturer:Fifteen 4-6-2...

 locomotives, built by the North British Locomotive Company

North British Locomotive Company

The North British Locomotive Company was created in 1903 through the merger of three Glasgow locomotive manufacturing companies; Sharp Stewart and Company , Neilson, Reid and Company and Dübs and Company , creating the largest locomotive manufacturing company in Europe.Its main factories were...

, retained their classification on the SAR roster, but the ALCO built one was reclassified to the sole Class 10D and renumbered 779.

Service

The Class 10D was placed in service on fast passenger work in the Transvaal and later in the Orange Free State. It spent its last working years at Bloemfontein, until it was withdrawn from service in 1931 and scrapped.

See also

• South African Class 10 4-6-2
  South African Class 10 4-6-2
  In 1904 the Central South African Railways placed fifteen Class 10 steam locomotives with a 4-6-2 Pacific wheel arrangement in service. In 1912, when they were assimilated into the South African Railways, they were renumbered but retained their Class 10 classification.-Manufacturer:Fifteen 4-6-2...
  
  
• South African Class 10A 4-6-2
  South African Class 10A 4-6-2
  In 1910 the Central South African Railways placed ten Class 10-2 4-6-2 Pacific steam locomotives in service, of which five were built with and five without superheaters...
  
  
• South African Class 10B 4-6-2
  South African Class 10B 4-6-2
  In March 1910 the Central South African Railways placed ten Class 10-2 steam locomotives with a 4-6-2 Pacific wheel arrangement in service, of which five were built with and five without superheaters. In 1912, when the five superheated locomotives were assimilated into the South African Railways,...
  
  
• South African Class 10C 4-6-2
  South African Class 10C 4-6-2
  In 1910 the Central South African Railways placed twelve Class 10-C 4-6-2 Pacific steam locomotives in service. When the South African Railways was established in 1912, these locomotives were renumbered and reclassified to Class 10C.-Manufacturer:...
  
  
• Tender locomotive numbering and classification
• The 4-6-2 "Pacific"
• List of South African locomotive classes