The choice of hydraulic transmission has a series of advantages that distinguish PT-400 from PTO-driven vehicles:

• wider operating range for the front attachment, meaning greater flexibility;
• fewer vibrations make it possible to work more smoothly and uniformly.
• less wear and tear on the prime mover and its major parts (engine, gearboxes, …): this aspect in particular gives PT-400 components longer life, fewer breakdowns and higher reliability.

Sauer Danfoss pumps and motors have been chosen bearing in mind not only perfect integration with the other main components on PT-400, but also the heavy-duty work the vehicle is designed for; in particular:

• for track transmission 75 cc (4.6 in³) pumps are used, together with motors with proportional displacement of 110 cc (6.7 in³), working pressure of 420 bar (6090 psi) and oil flow of 314 l/min (77 gpm)
• for mulcher transmission 250 cc (15.3 in³) pumps are used, together with motors with fixed displacement of 130 cc (7.9 in³), working pressure of 210 bar (3045 psi) and oil flow of 550 l/min (141 gpm)