After the Second World War, various European locomotive manufacturers began developing diesel-electric locomotives, which began to displace steam traction in the USA. In Sweden, Nydqvist and Holm AB (NoHAB) acquired the license to manufacture diesel locomotives for the Electro-Motive Division (EMD) in 1949. The Americans owned an export version of the F-series with 2-stroke-diesel, which had a driver's cab at both ends. For the lighter superstructure in Europe, locos were equipped with six instead of four axles. Customer could choose between six (Co'Co wheel alignment) or four (A1A) (A1A) driven axles. During the Cold War, the procurement of 20 all-axle machines M61 for the Hungarian State Railways MÁV from NoHAB was spectacular, as there was a rule among the Warsaw Pact states that locomotives could not be obtained from western countries. However, since no vehicles were available in the Eastern Bloc that met the required specifications, the MÁV was allowed to procure the 1950 hp (at 900 rpm) and 105 km/h six-axle vehicles equipped with a steam boiler. The Hungarian locomotives were by far the best pullers of NoHAB family. Different starting processes can be selected with F1: 1x press button = warm start / press button 2x = false start / press button 3x = cold start
F5 enables the heavy load mode: The diesel notch is always one up compared with normal operation. If you want to jump two notches, simply set CV 104 to 170 (instead of 150).
F27 turns on the manual ntoching. Once F28 is on, you can use F28 to notch up and F29 to notch down. F27, F28, and F29 must be turned off to return to normal mode. If F27 is off and you press F28, the prime mover will run to full speed.
F17 will bring the locomotive to full stop.