The Unimat 09-32/4S is designed as a three-part vehicle. The main section of the machine is carried by two 2-axled bogies. The main frame is arched and encompasses the moving sub frame (‘satellite’) which carries all working units of the tamping machine. The satellite is supported on the track at the rear on a 2-axled bogie and is connected to the machine’s main frame at the front via a longitudinal roller guide. The 2-axled, bogie-mounted trailer, which carries the fuel tank with a capacity of 4,500 litres and a cabin for driving during transfer, is positioned directly behind the main section.