LNER Class O4
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The London and North Eastern Railway (LNER) Class O4 initially consisted of the 131 ex-Great Central Railway (GCR) Class 8K 2-8-0 steam locomotives acquired on grouping in 1923. These were then further added to when a total of 273 ex-Railway Operating Division ROD 2-8-0s to the same design were purchased between 1923 and 1927. Meanwhile, the 19 GCR Class 8M (LNER Class O5) were rebuilt as O4s in the 1920s and 1930s. Some locomotives were requisitioned by the army during World War II and sent abroad.
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[edit] Sub-classes
The LNER rebuilt many of them, and allotted them into eight subclasses. Sub-class details: [1]
- O4/1, Introduced 1911. Robinson GCR design with small boiler, Belpaire firebox, steam and vacuum brakes and water scoop.
- O4/2, Introduced 1925. O4/3 with cabs and boiler mountings reduced.
- O4/3, Introduced 1917. ROD locos with steam brake only and no scoop.
- O4/4, Rebuilt with O2 boiler, since rebuilt again.
- O4/5, No information.
- O4/6, Introduced 1924. Rebuilt from O5 retaining higher cab (63914-20 with side windows).
- O4/7, Introduced 1939. Rebuilt with shortened O2-type boiler, retaining GCR smokebox.
- O4/8, Introduced 1944. Rebuilt with 100A (B1) boiler.
In 1944, 58 O4s were rebuilt with 100A boiler, Walschaerts valve gear and new cylinders and classified O1.
[edit] British Railways
The locomotives passed to British Railways (BR) in 1948 and were given BR numbers in the range 63570-63920 but this range included 58 locomotives which had been rebuilt as Class O1.
[edit] Preservation
One, BR number 63601, is preserved in Britain where it runs on the preserved Great Central Railway at Loughborough.
[edit] References
- ^ Ian Allan ABC of British Railways Locomotives, summer 1961 edition, part 4, pp 36-37
[edit] External links
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