HKU.../4PB works as standart steering unit with auxiliary port destinet for flow providing additional vehicles funktions.
HKUQ.../4 is a new series of hydrostatic steering units with an additionally increased flow. HKUQ.../4 is an "Open Center-Non Load Reaction" hydrostatic steering in which restrictor for applying factor from 1,3 to 2,5 is built-in.
