The Ganz DVM-4 is a diesel-electric shunting locomotive developed and manufactured by Ganz-MÁVAG of Hungary in the mid-1950s to meet a requirement issued by the Soviet Railways (SZhD).
[1] The DVM-4 is of a hood-type design, with a cab at one end, external walkways around the engine compartment, and a welded steel frame.
[2] In the 1950s the Soviet Union began a large-scale program to replace steam locomotives with diesel and electric traction.
Ganz-MÁVAG thus began work on a derivative of their successful DVM-2 design, modifying it to meet Soviet specifications, and in 1956 a prototype of the new locomotive was tested on the Moscow-Kursk-Donbass Railway.
On the Baltic Railway (encompassing the Estonian, Latvian and Lithuanian SSRs), they were used to haul light, local passenger trains around Tallinn and Riga, in addition to shunting.
[2] In 1964 the SZhD received three very similar locomotives of works type DVM-7, which were designated ВМЭ2 (VME2) class; these had the same prime mover as the DVM-4, but upgraded to produce 589.4 kW (790 hp).