Serial production of DH 3600 type diesel shunting locomotives with 360 HP started in 1968 under license of German MAK Company and 25 units were produced up to 1975.

Production of 16 PA4 V-185 type diesel engines started in 1968 under license of French Semt Pielstick Company. ,

From a factory into an organization

In 1970 the Eskişehir Railway Factory became the name “Eskişehir Locomotive and Engine Industry” (ELMS).