The hydraulic fan motor is the core executive component of the excavator cooling system.It receives hydraulic oil output from the fan pump,converts hydraulic energy into rotating mechanical energy,and directly drives the cooling fan to rotate,providing heat dissipation for the engine water tank and hydraulic oil radiator.Compared to traditional belt fans,hydraulic fans can achieve stepless speed regulation,and some models have the function of reversing and blowing the radiator,which is widely used in medium and large tonnage excavators.　　Most fan motors are plunger type cycloidal motors,...