The course Fluid Systems students gain mobile enhanced knowledge of hydrostatic drives and transmissions for mobile machinery. It builds on the subjects while Fluid Mechanics, Fluid Mechanisms, Fluid systems and components, as well as other subjects. Knowledge gained in these courses apply to fluid systems of mobile devices. They are primarily hydraulic motors drive mobile machines, hydrostatic transmissions, hydraulic power steering, brake systems including ABS, hydraulic damping systems, vehicles, hydrostatic systems upgrades mobile machinery, lubrication systems, hydrodynamic torque converter clutch, etc. Through lectures acquainted with volume control hydrostatic drive and transfer, and the issue of proportional control of hydrostatic drives upgrades of mobile devices. Fundamentals of dynamics are applied to the hydraulic systems of mobile devices. Mentioned issues will be at practice examples through exercises, and also by individual projects.