1. Product Overview

This product isThe core heart component of Rexroth A4VSO series swash plate axial piston pumpofThe core heart component, mainly includingCylinder block,PistonandValve plate. These components are the friction pairs with the highest load and the most severe wear in the hydraulic pump. Their state directly determines the output pressure, flow rate and volumetric efficiency of the pump.

2. Details of Core Components

• Cylinder block

  • Process: The inner hole is honed with high precision to form a micron-level matching clearance with the piston; the end face is mirror-polished to closely fit the valve plate, ensuring sealing under high pressure.

    
    

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• Piston

  • Process: The spherical surface of the piston contacts the swash plate, and the rod part precisely matches the cylinder block hole to achieve reciprocating motion and bear huge lateral force.

    
    

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• Valve plate

  • Process: The surface is precisely polished. Some models are equipped with hydrostatic support grooves or damping holes to reduce leakage and noise and improve the anti-cavitation ability.

    
    

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3. Core Features

• Complete set of precise matching: The cylinder block and the piston are grouped and selected as a set of friction pairs to ensure that the matching clearance of each pair of components is consistent, avoiding early wear or internal leakage caused by improper clearance.

• High-cost-performance maintenance solution: Compared with replacing the entire pump assembly, replacing this core kit can save60%-70%or more of the maintenance cost. It is the most economical solution to restore the performance of the A4VSO pump.