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, resulting in liquid hammering detecting low suction pump less oil and high-pressure pipes, were generate noise. Therefore, we must properly designed tank pump repair, the correct choice filter, tubing and directional valve. Overheating hydraulic folding excessive heat pumps for two reasons, one is mechanical friction and heat. Since moving surfaces in dry or semi-dry friction state friction pump maintenance, 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 cooler pump, the pump can prevent excessive heat and high oil temperature phenomenon. Also, back to the oil filter blockage caused by excessive back pressure back to the oil, the oil temperature is too high and can cause the pump to overheat. Piston pump is an important means of hydraulic system. It relies on the plunger reciprocates in the cylinder, so that the volume of the cavity sealing work to achieve a change in the suction pressure oil. Piston pumps with a rated pressure, compact structure, high efficiency and flow and easy adjustment, are widely used in high-pressure, high flow and flow needs to be adjusted occasions, such as hydraulic machines, construction machinery and ships in. Hydraulic pump sales _ _ Jing Chong hydraulic preferred by the Jinan Jing Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) strong, credible, in Jinan, Shandong mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead crystal create hydraulic and you hand into the brilliant, for a better future!