Bidirectional variable displacement pump means a pump, the prime mover in the case of the same rotational direction, by changing the variable displacement mechanism, such as a method to change the inclination direction or the compression ratio of the axial piston pump of the swash plate, etc.. Examples such as the original is northeast - southwest to the variable displacement pump repair phone to the northwest - southeast direction, the variable pump suction port becomes the original oil outlet, original oil outlet into a suction port, which changes the flow of streams . Refinement variable pump in a closed loop, thus changing the direction of rotation of the load, such as rotating swash plate and cylinder swash plate pump exists in the cylinder plunger while absorbing, while oil pressure. Hydraulic Oil Selection: Selection 20-200Cstnian hydraulic oil viscosity hydraulic oil, recommended 30-50cST quality hydraulic oil viscosity. Variable oil pump sales of less than 5 degrees, coping hydraulic oil for heating. Cleanliness of hydraulic oil should be kept below NAS10 variable pump, should be cleaned every three months back to the oil filter cartridge, to keep the oil flow and clean. Oil level in the oil holding ruler bits or more: When the oil level is too low, the hydraulic oil is contained in the air is not sufficiently released, so that the pumps produce much noise and damage. Variable variable pump pump maintenance _ _ Jinan crystal by crystal Chong Chong hydraulic 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 continuous improvement to create innovative ideas will lead crystal hydraulic and you hand into the brilliant, for a better future!