Piston for Bosch Rexroth D89275

The 9440190 piston serves as a primary internal component for hydraulic pumps, facilitating the conversion between mechanical motion and fluid pressure. Within the pump housing, this part moves to draw in and discharge hydraulic fluid, which creates the necessary flow and pressure to operate various actuators throughout the machine. Its precise movement is essential for the effective operation of the hydraulic circuit.

This component is specifically engineered for compatibility with the Bosch Rexroth D89275 pump, which corresponds to the A4V056HD type. It is designed to meet the dimensional and operational tolerances required for this specific pump model. The piston ensures the internal sealing and displacement characteristics necessary for the pump to maintain its rated pressure and flow output during operation.

In axial piston pumps, these components are housed within the cylinder block and are driven by the swashplate angle to regulate fluid displacement. Maintaining the integrity of the piston and its contact surfaces is necessary to prevent internal leakage and pressure loss, which directly impacts the power output of the hydraulic system.