Hydraulic system when installing hydraulic pump 3 Notes: 1, hydraulic pump drive shaft and motor drive shaft concentricity deviation of less than 0.1MM, the general use of flexible coupling, not allowed to directly drive the V-axis with the shaft rotation , To prevent the pump shaft radial force is too large, affecting the normal operation of the pump; 2, the direction of rotation of the hydraulic pump and inlet and outlet should be installed as required; 3, various types of hydraulic pump suction height, generally less than 0.5 M.