China Railways DFH shunting locomotives

Specifications
Specifications
Configuration:;
• UIC	B'B'
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); DFH5 13.700 m (44 ft 11.4 in); DFH6 ?; DFH7 ?; DFH21 12.000 m (39 ft 4.4 in)
Transmission	Hydraulic

Type and origin
Type and origin
Power type	Diesel-hydraulic
Builder	DFH2, DFH5, DFH6, DFH7 Ziyang locomotive works; DFH2, DFH5, DFH21 Sifang locomotive works
Build date	DFH2 1973; DFH5 1976-1988; DFH6 1981; DFH7 1988; DFH21 1977 (prototype), 1982
Total produced	DFH2 ?; DFH5 >500; DFH6 1; DFH7 4; DFH21 >29

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, 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
Power type
Type and origin
Power type	Diesel-hydraulic
Builder	DFH2, DFH5, DFH6, DFH7 Ziyang locomotive works; DFH2, DFH5, DFH21 Sifang locomotive works
Build date	DFH2 1973; DFH5 1976-1988; DFH6 1981; DFH7 1988; DFH21 1977 (prototype), 1982
Total produced	DFH2 ?; DFH5 >500; DFH6 1; DFH7 4; DFH21 >29
Configuration:;
Specifications
Configuration:;
• UIC	B'B'
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); DFH5 13.700 m (44 ft 11.4 in); DFH6 ?; DFH7 ?; DFH21 12.000 m (39 ft 4.4 in)
Transmission	Hydraulic
Maximum speed
Performance figures
Maximum speed	DFH2 62 km/h (39 mph); DFH5 40 km/h (25 mph); DFH6 ?; DFH7 ?; DFH21 50 km/h (31 mph)
Power output	DFH2 650 kW (870 hp); DFH5 790 kW (1,060 hp); DFH6 1,740 kW (2,330 hp); DFH7 790 kW (1,060 hp); DFH21 640 kW (860 hp)
Operators
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.

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.

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