Mobile, portable filter units with integrated motor/pump units (filter carts) as cost-effective alternative to permanently installed partial-flow filters. Allows professional filling, flushing and cleaning of hydraulic systems and lubricating oil systems. Compact and agile while also suitable for long operating periods and high flow rates. Viscosity-dependent nominal flow rate up to 110 l/min. Use with spin-on or conventional filter elements with a filter grade between 3 and 125 µm.