Insufficient pump flow problems (1) inhalation volume. The reason is that the suction piping resistance is too large or if less than oil. As the pump speed is too large, the liquid level in the tank is too low, the hydraulic pump sales into the pipeline leak, oil filter blockage. (2) excessive leakage. The reason is that the gap is too large hydraulic pump, caused by poor seal. As with the oil pan is metal fragments, iron and other scratches, face oil spills; variable mechanism in a one-way valve sealing surface with the bad, the bearing surface pump and oil pan or grind marks and other trachoma. Can determine the site of the pump is damaged by checking the hydraulic oil in the pump body mixed foreign matter. (3) maintenance of hydraulic tilt plate angle too small, little displacement pump, which need to adjust the variable piston, swash plate angle increases. Output flow fluctuations related to many factors. Variable pump can be considered as caused by poor control variable mechanism, such as foreign matter entering the variable hydraulic pump repair mechanism, set aside the order marks in the control piston, wear marks, scars, resulting in unstable control piston movement. Because the amplifier energy shortage or damaged parts, comprising a control piston spring damper effectiveness is poor, it can cause instability in the control piston movement. Unstable flow is often accompanied by pressure fluctuations. Such failures are generally open pump, replacement of damaged parts, increased damping, spring rates and improve control pressure. Liyuan hydraulic pump, hydraulic creating crystal factory direct crystal provided by the Jinan Chong Hydraulic Machinery Co., Ltd .. 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!