Hydraulic pump drive shaft can not bear radial force and axial force, it does not allow direct installation in the shaft pulley, gears, sprockets, usually the drive shaft and pump shaft coupling connection. Let's us see hydraulic pump of the different types.

   Hydraulic pump gear pumps and vane generally can not meet the requirements when using the pump piston. There are other forms of hydraulic pumps, such as screw, etc., but not as good as the above-mentioned three kinds of universal application.