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The Taff Vale Railway O4 class was a class of 0-6-2T steam tank locomotives designed by Tom Hurry Riches and introduced to the Taff Vale Railway in 1907. They were rebuilt with taper boilers and superheaters by the Great Western Railway (GWR) from 1924.

Taff Vale Railway O4 class
'O4' No. 289 at Danygraig Locomotive Depot, Swansea Docks 1946
Type and origin
Power typeSteam
DesignerTom Hurry Riches
BuilderBeyer, Peacock & Co. (24);
Manning Wardle (7);
Vulcan Foundry (10)
Build date1907 (7), 1908 (14), 1910 (20)
Total produced41
Specifications
Configuration:
​
 • Whyte0-6-2T
Gauge4 ft 8+1⁄2 in (1,435 mm) standard gauge
Driver dia.4 ft 6+1⁄2 in (1.384 m)
Loco weight61.00 long tons (68.32 short tons; 61.98 t)
Fuel typeCoal
Boiler pressure175 psi (1.21 MPa)
CylindersTwo, inside
Cylinder size17.5 in × 26 in (444 mm × 660 mm)
Performance figures
Tractive effort21,730 lbf (96.7 kN)
Career
OperatorsTaff Vale Railway
Great Western Railway;
British Railways
Retired1948–1955
DispositionAll scrapped

The first loco withdrawn was 402 in April 1948 from Treherbert shed. The last three locos, 290, 317 and 321 were withdrawn together from Cardiff East Dock shed in July 1955. None are preserved.


Builders and numbering


The locomotives were built in several batches by Vulcan Foundry, Manning Wardle and Beyer, Peacock and Company. Their GWR numbers were in the range 200-420 but they were not consecutive and were intermingled with other classes.

YearQuantityManufacturerSerial NumberTVR NumbersGWR NumbersNotes
19077Manning Wardle1698–170438, 43, 59, 67–69, 94285, 287, 293–295, 420, 296420 renumbered 220 sometime between 1946 and 1950
19087Beyer, Peacock & Co.5095–510139, 95, 97, 98, 101, 102, 104286, 297–302300–302 renumbered 200–202 sometime between 1946 and 1950
19087Beyer, Peacock & Co.5127–51336, 9, 48, 56, 58, 105, 111280, 282, 289, 291, 292, 236, 314314 renumbered 206 sometime between 1946 and 1950
191010Beyer, Peacock & Co.5384–539313, 49, 112–116, 118, 119, 121409, 290, 315, 317–321, 324, 333315, 317–321, 324, 333, 409 renumbered 207–211, 215–218 sometime between 1946 and 1950
191010Vulcan Foundry2529–25381, 28, 8, 17, 35, 36, 46, 108–110278, 279, 281, 283, 284, 414, 288, 310, 311, 313310, 311, 313, 414 renumbered 203–205, 219 sometime between 1946 and 1950

See also




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