Diesel Locomotive Works
The Diesel Locomotive Works in Varanasi, India, is a production unit of Indian Railways. DLW stopped manufacturing Diesel locomotives in March 2019 as IR is moving towards 100% electrification of its rail network. Currently DLW produces only electric locomotives WAP-7 & WAG-9HC. It was the largest diesel-electric locomotive manufacturer in India.
Company
Founded in 1961, the DLW rolled out its first locomotive three years later, on 3 January 1964. It manufactures locomotives which are variants based on the original ALCO designs dating to 1960s and the GM EMD designs of the 1990s. DLW has an annual production capacity of 250 locomotives and plans to increase it to 275 based on the current demand. Since inception, DLW has manufactured a total of 8099 various types of locomotives. DLW manufactured 334 diesel-electric locomotives during financial year 2016–17, which is the highest ever loco production by any loco manufacturing unit in India and bagged the "Best Production Unit Shield" for the second successive year.In AUGUST 2019, DLW developed the India's first bi-mode locomotive, the WDAP-5.
Locomotives produced at DLW
DLW locomotives have power outputs ranging from to. Currently DLW is producing WAP7 and WAG9HC for Indian Railways. Some of its EMD locomotive products are WDP4, WDP4D, WDG-4D, WDG-5 and others as of June 2015.DLW Stopped Production of WDG4D and WDP4D in March 2019.DLW recently started producing HEP capable WAP-7 high horsepower Electric Locomotives and its series starting from 37*** and WDM-2G genset locomotives. Recently, it has been allotted to Santragachi & Tughlakabad Loco Shed.The designation of the locomotives follows the Nomenclature of Indian Railways. Prototypes and individual vehicles are not listed.
| Model series | Number | Construction year | Development | Commitment | Engine | Axis formula | Picture |
| WDM-2 | 2700 | 1962–1998 | Technological Transfer Alco DL560C | Mixed Traffic locomotive | Alco 251B 12-cylinder 2600 HP | Co′Co′ | |
| WDM-3A | 158 new 700 rebulit | 1994–1998 | WDM-2 with upgraded engine | Mixed Traffic locomotive | Alco 251C 16-Cylinder 3100 HP | Co′Co′ | |
| WDM-3D | 344 | 2003 | WDM-3A with Microprocessor engine control EMD parts and bloster-less bogies | Mixed Traffic locomotive | Alco 251C 16-Cylinder 3300 HP | Co′Co′ | |
| WDM-7 | 15 | 1987–1989 | lowered power version of WDM-2 | Shunting service,Branch lines Mixed Traffic locomotive | Alco 251B 12-Cylinder 2600 HP | Co′Co′ | |
| WDP-1 | 69 | 1995–1999 | WDM-2-Variant for passenger traffic | Passenger traffic | Alco 251C 12-Cylinder 2300 HP | Bo′Bo′ | |
| WDP-3A | 69 | 1998–2002 | variant developed from WDM-3A for passenger trains with two final driver's cabs and max speed of 160 km / hr | Passenger traffic | Alco 251C 16-Cylinder 3100 HP | Co′Co′ | |
| WDP-4 | 102 | 2002–2011 | Technology Transfer EMD GT46PAC | Passenger traffic | EMD 710G3B 16-Cylinder 4000 HP | Bo1′1Bo′ | |
| WDP-4B | 90 | 2010–2014 | The WDG4 derived passenger locomotive | Passenger Traffic | EMD 710G3B 16-Cylinder 4500 HP | Co′Co′ | |
| WDP-4D | 234 | 2010–2019 | WDP-4B with dual cabs | Passenger Traffic | EMD 710G3B 16-Cylinder 4500 HP | Co′Co′ | |
| WDG-3A | 1998 | 1995–2010 | freight variant of WDM-3A | Goods traffic | Alco 251C 16-Cylinder 3100 HP | Co′Co′ | |
| WDG-4 | 431 | 1999–2012 | Technology Transfer EMD GT46MAC | Goods traffic | EMD 710G3B 16-Cylinder 4000 HP | Co′Co′ | |
| WDG-4D | 240 | 2013–2019 | WDG-4D | Goods traffic | EMD 710G3B 16-Cylinder 4500 HP | Co′Co′ | |
| WDS-6 | 270 | 1975– | Drivetrain of the YDM-4 meter gauge locomotive as part of the WDM-2 Body | Shunting | Alco 251D 6-Cylinder 1400 HP | Co′Co′ | |
| YDM-4 | 541 | 1961–1993 | Technology transfer Alco DL535A | Metre gauge | Alco 251D 6-Cylinder 1400 HP | Co′Co′ |