China Railways DFH shunting locomotives

DFH2, DFH5, DFH6, DFH7, DFH21 东方红2、东方红5、东方红6、东方红7、东方红21
DFH2-0008
Type and origin Power type Diesel-hydraulic Builder DFH2, DFH5, DFH6, DFH7 Ziyang locomotive works[1] DFH2, DFH5, DFH21 Sifang locomotive works[1] Build date DFH2 1973[1] DFH5 1976-1988[1] DFH6 1981[1] DFH7 1988[1] DFH21 1977 (prototype), 1982 Total produced DFH2 ? DFH5 >500[2] DFH6 1[1] DFH7 4[1] DFH21 >29
Specifications Configuration: ​  • UIC B'B'[1] Gauge 1,435 mm (4 ft 8+1⁄2 in) DFH21 1,000 mm (3 ft 3+3⁄8 in) Minimum curve (?) Length DFH2 12.400 m (40 ft 8.2 in)[1] DFH5 13.700 m (44 ft 11.4 in)[1] DFH6 ? DFH7 ? DFH21 12.000 m (39 ft 4.4 in)[1] Transmission Hydraulic
Performance figures Maximum speed DFH2 62 km/h (39 mph)[1] DFH5 40 km/h (25 mph)[1] DFH6 ? DFH7 ? DFH21 50 km/h (31 mph)[1] Power output DFH2 650 kW (870 hp)[1] DFH5 790 kW (1,060 hp)[2][3] DFH6 1,740 kW (2,330 hp)[1] DFH7 790 kW (1,060 hp)[1] DFH21 640 kW (860 hp)[1]
Career Operators China Railway DFH2, DFH5, DFH6, DFH7, DFH21 Vietnam Railways D10H

The China Railways "Dongfang Hong" diesel-hydraulic locomotive classes DFH2, DFH5, DFH6, and DFH7, built from the 1970s to 1990s, were all used as shunters on the Chinese railway network.

The use of diesel-hydraulic shunters has fallen out of favour on the Chinese rail network, with diesel-electric locomotives being used. However, diesel-hydraulic machines continued to be produced for industrial railways – mainly the China Railways GK classes.^[2]

The DFH21 class is a meter gauge version of the DFH2, and was used on the Yunnan–Vietnam Railway for both passenger and freight services; the same machines are used on the Vietnam Railways where they are known as the D10H.