From 1953, Maschinenfabrik Kiel offered the four-axle models 600 D and 800 D as the first version of the first-generation shunting locomotives. To improve cornering ability, two axles were connected to a Beugniot lever and thus shifted sideways without creating problems for the transmission with coupling rods. The MaK marine diesels MS 301 and MA 301 each delivered 600 and 800 hp from six cylinders respectively. What was new for shunting locomotives was that the 800 D could be supplied with a gear ratio for a top speed of up to 80 km/h on request. From 1957 and 1958, first the MaK 850 D and then the 650 D were available, each with 50 hp more thanks to revised engines. The V 65 was developed from the 650 D, which was designed for use by the Bundesbahn.
Nineteen of the 600 D locomotives were delivered to Cuba, nine to Turkey and 29 to private German customers. Of the 104 800 Ds in total, 46 were exported to Sweden, 25 to Cuba and five to Turkey. The 21 pieces of the 650 D remained mostly in Germany, but of the 33 pieces of the 850 D, 23 alone went to Cuba.
The MaK 1000 D with the same dimensions was already available from 1955. It had the same engine as the 800 D, but it now had 1,000 hp thanks to a turbocharger. It received standard gearing for 60 km/h and greater tractive effort, but an example was built with a design for 92 km/h on an experimental basis. 22 examples were built, eight of which were delivered to Cuba. Two years later, the 1200 D was introduced, which had a further increased output of 1,200 hp thanks to the engine speed being increased to 1,000 rpm and was built 15 times. It were precisely these strongest locomotives that were often ordered with a service weight increased by ballast to up to 80 tons.
