Abstract: The paper presents briefly the hydraulic system of multi-functional crusher cleaner, makes detailed theoretical analysis of the mechanism of three hydraulic system plans (throttle-governor system with fixed displacement dual pump, constant flux control system with fixed displacement pump and load-sensitive control system with variable pump), and describes the reasons for selecting the load-sensitive variable pump control system for multi-functional crusher cleaner.

Key words: Throttle speed control, Constant flux control, Load-sensitive control