Inlet pipe is too small, the flow capacity into the oil filter too small or clogged intake air inlet pipe, exclusion of oil is too high, too low, insufficient oil suction and pressure pipes produce liquid impact, etc., will produce noise . So pump sales, must be properly designed tank, the correct choice filter, tubing and directional valve. Folding hydraulic pump overheating excessive heat pump maintenance for two reasons, one is mechanical friction and heat. Since moving surfaces in dry or semi-dry friction state friction, friction between the moving parts of the heat. The second is a liquid friction and heat. High pressure oil leak to the low pressure chamber through a variety of gap, a large number of hydraulic energy into heat energy loss. Therefore, the correct choice of the gap between moving parts, fuel tank capacity and coolers, can put an end to excessive heat pumps and high oil temperature phenomenon. Further domestic pump, return oil back to the oil filter blockage caused by excessive back pressure, oil temperature is too high and the pump can cause overheating. Liyuan Hydraulic / A2FE160 products for the swash plate type (straight shaft axial) quantitative hydraulic piston motor is a hydraulic energy into mechanical energy. And LY-XJ0177-1 rotary gear coupling to use. This product has a structure Simple, small size and other characteristics, installation dimensions and the same type of imported products consistent, background noise, suitable for open hydraulic system widely used in various hydraulic excavator slewing mechanism, with braking device. Repair of hydraulic pumps _ Jing Chong Quality assurance (certification) _ pumps 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.