Axial piston pump Hydraulic axial piston pump is another type of hydraulic pump. It is available in two types of fixed axial piston pump and variable axial piston pump and also has the following characteristics: For mechanized hydraulic systems, multi-piston pumps are used. These hydraulic pumps can create a more uniform flow of fluid. In hydraulics, two types of radial and axial piston pumps are used. In hydraulic axial piston type, the pistons are placed parallel to the main axis of the pump. The pistons are placed around the main axis of the pump and on the circumference of the circle. The rotation of the main axis of the pump causes the pistons and their cylinders to rotate. By installing a mechanism that changes the angle of the screen behind the pistons, the displacement volume of a pump can be changed. This mechanism actually changes the length of the course of each piston. In this section, the specifications of the axial hydraulic piston pumps provided by Roxan Parsian are given. The basis of piston pumps is based on the reciprocating motion of the piston inside the cylinder, which performs the action of suction and suction of fluid in each reciprocating motion. In other words, the pump converts the rotational motion of the input shaft to the reciprocating motion of the piston. This is usually done by a fixed or variable angle plate (swash plate). In these pumps, the central line of the cylinder block is at a certain angular position relative to the central line of the drive shaft. The piston rods are connected to the actuator axis flange by spherical connections so that changing the distance between the actuator flange and the cylinder block causes the pistons to move back and forth in the cylinder. A Universal link connects the cylinder block to the drive shaft. The axial piston pump, the cylinder block shaft, and the drive shaft are located along the center line. When the cylinder block rotates, the pistons follow the position of the angle plate. They make a reciprocal move. The oil inlet and outlet ducts are connected to the cylinder block via a separator plate.