The Diesel Locomotive Works (DLW) in Varanasi, India, is a production unit owned by Indian Railways, which manufactures diesel-electric locomotives and their spare parts. It is the largest manufacturer of diesel-electric locomotives in India. Locally it is abbreviated as D L W. It is located on the DLW to BHU road of the metropolitan city of Varanasi.
Founded in 1961, DLW launched its first locomotive three years later, on January 3, 1964. It manufactures locomotives that are variants based on the original ALCO designs that date back to the 60s and the GM EMD designs of the 90s. DLW has an annual production capacity of 250 locomotives and plans to increase it to 275 depending on the current demand.
The DLW locomotives have powers ranging from 2,600 horsepower (1,900 kW) to 5,500 horsepower (4,100 kW). DLW currently produces EMD GT46MAC and EMD GT46PAC locomotives under license from Electro-Motive Diesels (formerly GM-EMD) for Indian Railways. Some of its EMD locomotive products are WDP4, WDP4D, WDG4D, WDG5 and others as of June 2015.