JNR Class ED73

Class ED73

The first locomotive delivered, ED73 1, in 1962

Type and origin Power type Electric Builder Toshiba Build date 1962 - 1963 Total produced 22

Specifications UIC class Bo-Bo Gauge 1,067 mm (3 ft 6 in) Bogies DT119B Wheel diameter 1,120 mm (3 ft 8 in) Length 14,400 mm (47 ft 3 in) Width 2,805 mm (9 ft 2.4 in) Height 4,260 mm (14 ft 0 in) Loco weight 67.2 t Electric system(s) 20 kV AC, 60 Hz Current collection overhead wire Traction motors MT52

Performance figures Power output 1,900 kW

Career Operators JNR Numbers ED73 1–22, ED73 1001–1022 Locale Kyushu Delivered 1962 First run 1962 Preserved 0

The Class ED73 (ED73形) was a Bo-Bo wheel arrangement AC electric locomotive type operated by Japanese National Railways (JNR) in Kyushu, Japan, between 1962 and the 1980s.^[1]

Design

The Class ED73 design was broadly derived from the Class ED72 locomotives introduced a year earlier, but as the Class ED73 was primarily intended for use on freight services, it did not include a steam generator for train heating, and was therefore 3 m (9 ft 10 in) shorter than the Bo-2-Bo wheel arrangement Class ED72.^[1] The DT119B bogies were also almost identical to those used on the full-production Class ED72 locomotives.^[2]

History

A total of 22 locomotives were built by Toshiba between 1962 and 1963.^[1] The first locomotives were delivered to Moji Depot in northern Kyushu.^[2]

In the late 1960s, the entire class was modified with improved braking performance for use on express freight services, and the locomotives were renumbered in the ED73 10xx series.^[1] The locomotive numbers were painted yellow at this time.^[1] In later years, the class was also used on overnight sleeping car services, as these trains did not require steam heating.^[1]

The class was withdrawn by the early 1980s.^[1] No examples of the class have been preserved.^[3]

See also

• Japan Railways locomotive numbering and classification

References

1. Inoue, Kōichi (1999). 国鉄機関車辞典 [JNR Locomotive Encyclopedia]. Japan: Sankaido. pp. 140–141. ISBN 4-381-10338-6.
2. Tezuka, Kazuyuki (January 1963). "交流電気機関車ED731" [AC electric locomotive ED73 1]. Japan Railfan Magazine (in Japanese). Vol. 3 no. 19. Japan: Koyusha Co., Ltd. p. 14.
3. Sasada, Masahiro (September 2012). 国鉄&JR保存車大全 [JNR & JR Preserved Rolling Stock Complete Guide]. Tokyo, Japan: Ikaros Publications Ltd. p. 126. ISBN 978-4863206175.