... High volumetric efficiency 3.High Pressure,Low noise High Pressure hydraulic gear pump Products Features1, Compact structure, small volume, beautiful outlook. ... take out the nuts on the pump lid, the motor and the driving components. Hydraulic gear pump structureParametersAbout usLiuzhou Shuangji Machingery Co., ... to contact us! ^_^ We can produce various hydraulic cylinders Hydraulic gear oil pump