China Railways DFH mainline locomotives

DFH1, DFH3, DFH4 东方红1、东方红3、东方红4
DFH3-0009 at Beijing Railway Museum (2010)
Type and origin Power type Diesel-hydraulic Builder DFH1: Sifang DFH3: Sifang DFH4 Sifang, Ziyang, Qishuyan  China Build date DFH1 1959‡[1] 1964-1972 (series) DFH3 1976-87[1] DFH4 1969-81[2] Total produced DFH1 109[1] DFH3 268 DFH4 6[2]
Specifications Configuration: ​  • UIC DFH1,DFH3 B’B’ DFH4 6 axle Gauge 1,435 mm (4 ft 8+1⁄2 in) Wheel diameter DF1, DF3 1,050 mm (41.34 in) DF4 ? Minimum curve DF1, DF3 145 m (476 ft) DF4 ? Length DFH1 16.550 m (54 ft 3.6 in)[1] DFH3 17.970 m (58 ft 11.5 in)[1] Width DFH1 3.106 m (10 ft 2.28 in) DFH3 3.279 m (10 ft 9.09 in) Height DFH1 4.516 m (14 ft 9.80 in) DFH3 4.450 m (14 ft 7.20 in) Loco weight DFH1 84 t (83 long tons; 93 short tons) DFH3 92t Prime mover DFH1 2 of 12V175Z, 12V180Z or 12V175ZL DFH3 12V180JZ DFH4 2 of 12V200ZL later 12V200ZJ[2] Transmission DFH1 hydraulic 12175Z (2 of)[3]
Performance figures Maximum speed DFH1 140 km/h (87 mph)*,[1] 120 km/h (75 mph)†[1] DFH3 120 km/h (75 mph)[1] Power output DFH1 1,060 kW (1,420 hp)*,[1] 1,220 kW (1,640 hp)†[1] DFH3 2*730 kW (980 hp), 2*820 kW (1,100 hp)¤[1] DFH4 3,308 kW (4,436 hp)¶[1] Tractive effort DFH1250 kN (56,000 lbf) / 270 kN (61,000 lbf) (maximum) DFH3 271 kN (61,000 lbf) (maximum)
Career Operators China Railway Korean State Railway
First 73 units † Final 36 units ‡ NY1 prototype ¤ Two units produced in 1986 of higher power ¶ First units produced were of higher power[2]

The China Railways DFH1 (Chinese: 东方红1) was a type of 4-axle B'B' single-cab diesel-hydraulic locomotive used on mainline passenger services; the DFH3 (Chinese: 东方红3) was a later development of a similar design but with two driving cabs.

The China Railways DFH4 (Chinese: 东方红4) was a 6-axle high-powered freight and passenger locomotive, it did not reach mass production.