目前,在西德次要铁路和工矿专用线上运用的内燃机车有1200～1500台,其中大部分是1950～1960年间制造的。使用者感到这些机车面临着一个更换的问题。为了降低价格和维修费用,决定购买标准化机车。它们成立了一个工作小组,经过几年研究以后,制定了两种机车方案:第一种方案的机车为无转向架式结构,三轴,功率在370～520千瓦之间;第二种方案的机车为BB轴 At present, 1,200 to 1,500 diesel locomotives are being used on the West German secondary railways and industrial and mining lines, most of which were made between 1950 and 1960. Users feel that these locomotives face a replacement problem. In order to reduce the price and maintenance costs, decided to buy a standardized locomotive. They set up a working group, after several years of research, developed two locomotive programs: the first program locomotive without bogie-type structure, three-axis, power between 370 to 520 kilowatts; the second program Locomotive for the BB axis