A Small Locomotive for Big Uses.
The best known small locomotive and also the diesel locomotive built in the largest numbers in German was the Köf II, a diesel hydraulic small locomotive with around 125 horsepower. These locomotives were authorized for 30 to 50 km/h / 19 to 31 mph, depending on the brake system. Approximately 800 new locomotives for the DB were built in addition to about 1,000 locomotives of this class from the Forties. Around 1976, 1,100 units were in service on the DB; they had been re-designated as the classes 322, 323, and 324. On the DR (East Germany) approximately 250 Kö II and Köf II were in service as the classes 100.1 and 100.8, which became the class 310 on the DB AG. In addition to the state railroad's small locomotives, there are a large number of other units that were delivered directly to private railroads and industrial operations both domestically and abroad. The total number off the Köf II and its siblings is estimated at 2,500 units. Many of these proven small locomotives are still in service today as second hand locomotives.