Chosen Government Railway Tehoko class (テホコ) Korean National Railroad Teou5 class (터우5) Korean State Railway Tŏuo class (더우오)
A wrecked Sentetsu Tehoko-class locomotive in 1945.
Type and origin Power type Steam Builder ALCo, Shahekou Works Build date 1917–1919 Total produced 36
Specifications Configuration: ​  • Whyte 4-6-0 Gauge 1,435 mm (4 ft 8+1⁄2 in) Driver dia. 1,680 mm (66 in) Length 17,972 mm (58 ft 11.6 in) Width 2,997 mm (9 ft 10.0 in) Height 4,232 mm (13 ft 10.6 in) Loco weight 72.52 t (71.37 long tons) Tender weight 43.45 t (42.76 long tons) Fuel capacity 6.00 t (5.91 long tons) Water cap. 15,100 L (4,000 US gal) Firebox: ​  • Grate area 3.73 m2 (40.1 sq ft) Boiler: ​  • Small tubes 167 x 51 mm (2.0 in)  • Large tubes 20 x 137 mm (5.4 in) Boiler pressure 12.6 kgf/cm2 (179 psi) Heating surface 175.50 m2 (1,889.1 sq ft) ​  • Tubes 161.90 m2 (1,742.7 sq ft)  • Firebox 12.00 m2 (129.2 sq ft) Superheater: ​  • Heating area 38.60 m2 (415.5 sq ft) Cylinders 1 Cylinder size 530 mm × 660 mm (21 in × 26 in) Valve gear Walschaerts
Performance figures Maximum speed 95 km/h (59 mph) Tractive effort 120.0 kN (27,000 lbf)
Career Operators Chosen Government Railway Korean National Railroad Korean State Railway Class Sentetsu: テホコ KNR: 터우5 KSR: 더우오 Number in class 36 Numbers Sentetsu: テホコ1–テホコ36 Delivered 1917–1919

The Tehoko-class (テホコ) locomotives were a class of steam tender locomotives of the Chosen Government Railway (Sentetsu) with 4-6-0 wheel arrangement.^[1] The "Teho" name came from the American naming system for steam locomotives, under which locomotives with 4-6-0 wheel arrangement were called "Ten Wheeler".^[2]

After the Liberation of Korea, of the 178 surviving locomotives of all Teho classes - including six previously owned by private railway companies - 106 went to the Korean National Railroad in the South, and 72 to the Korean State Railway in the North.^[3]

Description

The first large class of 4-6-0 locomotives delivered to Sentetsu was the テホコ (Tehoko) class, which were express locomotives equipped with automatic injectors and other improvements, and which were much larger than the previous Teho classes.^[1] The first nine, originally numbered 271–279, were built by ALCo's Schenectady Works in 1917,^[4] followed by six copies, numbered 280–285, built in the same year by the South Manchuria Railway's Shahekou Works;^[1] Another twelve followed in 1918 from ALCO's Pittsburgh plant, numbered 295–306.^[1] Like all Teho-type locomotives operated by Sentetsu, they had driving wheels of 1,680 mm (66 in) and a top speed of 95 km/h (59 mph),^[1] and were initially used as mainline passenger power on the Gyeongbu Line; they were later relegated to branchline duties.^[5] In the 1938 general renumbering they became テホコ1 through テホコ36.^[4] The 27 locomotives on the roster at the time of the 1918 renumbering became 701–727 in that year;^[4] the last nine, delivered in 1918–19 from Shahekou, were numbered 728–736. In Sentetsu's general renumbering of 1938 the class was designated テホコ (Tehoko) class, and the locomotives were renumbered テホコ1 through テホコ38.^[1]

Postwar

Construction

References