In order to increase the load capacity of construction machinery, hydraulic motors, direct way is to increase its hydraulic system pressure, flow and power. Currently, advanced engineering machinery products rated international pressure, mostly in more than 30 MPa, hydraulic motors for sale, and with advances in materials science and technology, there are toward the higher pressure even using high pressure hydraulic technology direction of the trend; traffic usually in the hundreds of liters per minute; power in hundreds of kilowatts. Such as Germany Orensttein && Koppe made the world's first largest RH400 full hydraulic excavator bucket capacity of 42 m3, hydraulic oil source for the variable displacement axial piston pump 18, maintenance of hydraulic motors, 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. Qualitative and quantitative analysis should be uniform, mutually complementary; qualitative analysis is the basic prerequisite for quantitative analysis, there is no qualitative and quantitative is a blind, worthless quantitative; qualitative and quantitative analysis to make it more scientific and accurate, it It can cause extensive and in-depth qualitative analysis of the conclusions drawn. Quantitative analysis is based on statistical data, the mathematical model and a mathematical model to calculate the object's method of analysis of the indicators and their values. Hydraulic motor installation, creating hydraulic preferred crystal (certification), the hydraulic motor 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.