In 1946, Hans Hürlimann launched two of the best tractors in the world, the D-100 and D-200 models. The Hürlimann engine with an output of 45 hp was the product of decades of experience in engine construction. The engines were designed according to the then modern principle of direct injection. The low-speed 4-cylinder diesel engine was characterized by its smooth, balanced running and very long service life. For many years, Hürlimann tractors were equipped with the proven Hürlimann worm gear.

It was completely insensitive to the most severe overloads. The worm and worm wheel of the Hürlimann tractor were even made on the world famous machines of David Brown. The Swiss Army was also impressed by the Hürlimann quality and procured over 120 examples of the D-200 type between 1948 and 1952. The last examples were even in service until 1992!