During the war, about 80% of MAN’s factory buildings were destroyed, but production equipment and spare parts stock were stored in the countryside. A few trucks were built in Nuremberg as early as 1945. Before the war, MAN’s tractor production had focused on large models, but now there was demand rather for smaller tractors. As early as 1941, MAN had introduced a prototype of a 25-horsepower tractor, which was now taken into further development. Familiar solutions ended up on the drawing board, such as a frameless design where the engine is a load-bearing part. Production began in 1948, which was early compared to many competing German brands. The AS 325 H had a 2.7-liter water-cooled, direct-injection four-cylinder diesel engine and a ZF 5-speed transmission. The tractor was well-equipped: it included, among other things, a differential lock, steering brakes, a leaf-sprung front axle, 12-volt electrical system, and a speedometer. The marketing name chosen was Ackerdiesel (=field diesel). The tractor’s color was more turquoise-tinged than the previous green.

At the very beginning, a four-wheel-drive model, the AS 325 A, was also introduced, which was one of the first German four-wheel-drive tractors. Power for the front wheels was taken from the side of the transmission. The front wheels were only slightly larger than on the rear-wheel-drive model.

In 1950, the AS 330 was introduced alongside, with the engine capacity increased to 2.9 liters and power to 30 horsepower. The majority of production was four-wheel-drive models. The AS 330 A is probably the first four-wheel-drive tractor imported to Finland. Cheaper competing brands flooded the market, and MAN did not achieve a very high market share with rear-wheel-drive tractors.

In 1952, the AS 430 was introduced, featuring a 6-speed transmission and more powerful brakes, as well as the AS 440, where the engine speed was increased from 1500 to 2000 rpm. Power rose to 40 horsepower. An optional lowering crawler gear was available, which also allowed the power take-off speed to be reduced from 735 to 550. The same engine, enhanced by another 2 horsepower, was installed in larger frames in the AS 542 model. It also had a sturdier transmission and rear axle.

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