1. Pilot pressure control works displacement of maximum displacement motor starting, when the working pressure is lower than the set pressure valve 7, valve 7 can not afford to control action, motor displacement with X port pilot control pressure changes in stepless variation between the maximum and minimum, enabling the pilot pressure control. When the motors A, B port to provide any working oil pressure when the oil pressure of the cylinder can enter the small chamber 5 of the variable through the check valve. When X port pilot control pressure increases the hydraulic motor, pilot control oil pressure acting on the valve a force will overcome the spring force regulating hydraulic motor 2 and spring 3 fixes, pushes the valve a move to the right in order to improve the load capacity of construction machinery direct method is to increase its hydraulic system pressure, flow and power. Currently, advanced engineering machinery products rated international pressure, mostly in more than 30 MPa, and with the progress of the hydraulic motor repair materials science and technology, there are toward the higher pressure even using high pressure hydraulic technology direction of the trend; traffic is typically In hundreds of liters per minute; power over hundreds of kilowatts. Such as Germany Orensttein && Koppe made the world's first largest RH400 full hydraulic excavator bucket capacity of 42 m3 Liyuan Hydraulic motors, hydraulic oil source 18 variable displacement axial piston pump, the total flow of up to 10,200 L / min; the original motivation for the two QSK60 diesel engine, with a total power of up to 2 014 kW. Hydraulic motors Accessories | crystal create a hydraulic (certified) | hydraulic motors from Jinan Jing Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) Shandong Jinan, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In the crystal creating hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal creating hydraulic better future.