China Railway DF7G
Dōngfēng 7G
China 2002 386+ produced
The DF7G is a six-axle diesel-electric locomotive built for shunting service and for short transfer and mainline services. It is being powered by a twelve-cylinder variant of the sixteen-cylinder engine that powers the DF4C mainline locomotive. From the standard types 0000 and 5000, more than 370 have been built. Very similar to the type 5000 is the type 9000 of which only four have been built for dock working. Three of the type 8000 were built as plateau type for work on the Lhasa railway. These have a more powerful 16-cylinder engine that still delivers enough power at high altitudes. More locomotives were exported to Cuba, Mongolia and Estonia.
Technical data
General
| Property | type 0000 | type 5000 / 9000 | type 8000 |
|---|---|---|---|
| Built | seit 2002 | seit 2003 | 2006 |
| Manufacturers | Qingdao Sifang, Qishuyan, CRRC Beijing | ||
| Wheel arrangement | C-C | ||
| Gauge | 1,435 mm (Standard gauge) | ||
Dimensions and weights
| Property | type 0000 | type 5000 / 9000 | type 8000 |
|---|---|---|---|
| Length | 18.40 m | 18.98 m | |
| Service mass | 138 t | ||
| Adhesion mass | 138 t | ||
| Rigid wheelbase | 3.60 m | ||
| Axle load | 23 t | ||
Power plant
| Property | type 0000 | type 5000 / 9000 | type 8000 |
|---|---|---|---|
| Engine | 12V240ZJ | 12V240ZJ6F | EQ16V240ZJB |
| Engine type | V12 diesel | V16 diesel | |
Power
| Property | type 0000 | type 5000 / 9000 | type 8000 |
|---|---|---|---|
| Power source | diesel-electric | ||
| Indicated power | 2,200 kW (2,991 PS) | 2,000 kW (2,719 PS) | 2,940 kW (3,997 PS) |
| Top speed | 100 km/h | ||
| Starting effort | 435.0 kN | 438.0 kN | |
Calculated values
| Property | type 0000 | type 5000 / 9000 | type 8000 |
|---|---|---|---|
| Factor of adhesion | 1 : 3.11 | 1 : 3.09 | |
| Power-to-weight ratio | 15.9 kW/t | 14.5 kW/t | 21.3 kW/t |
| Adhesive weight/Total | 1 : 1.00 | ||
