A4FO22 Hydraulic pump

The A4FO22 pump is a model within the A4FO series of axial piston hydraulic pumps, engineered for high efficiency and reliability in converting mechanical power into hydraulic energy. These pumps operate on the axial piston principle, where several pistons are arranged in a circular pattern within a cylinder block, rotating around a central axis. This design allows for precise control of the hydraulic fluid flow and pressure, making axial piston pumps suitable for a wide range of demanding applications.

Features and Functions:

  1. High-Pressure Operation: The A4FO22 is built to withstand and operate efficiently under high-pressure conditions. This capability is crucial for applications requiring significant force or lift, ensuring consistent performance even under strenuous conditions.
  2. Variable Displacement: One of the defining characteristics of the A4FO22 pump is its variable displacement feature. This allows the pump to adjust its output flow rate and pressure in response to the hydraulic system’s demand, optimizing performance and energy efficiency. Variable displacement is achieved through the adjustment of the piston stroke length within the pump, controlled by a swashplate mechanism.
  3. Durability and Reliability: Designed with robust materials and engineering principles, the A4FO22 is built to offer long service life and dependability. Its construction is aimed at minimizing wear and tear even in harsh operating environments, reducing downtime and maintenance costs.
  4. Energy Efficiency: The pump’s design emphasizes minimizing energy loss through optimized hydraulic fluid dynamics and mechanical efficiency. This not only contributes to lower operating costs but also supports sustainability by reducing energy consumption.


The versatility and performance of the A4FO22 pump make it suitable for a broad spectrum of applications across various industries. Some of the primary application areas include:

  • Construction Machinery: In excavators, cranes, loaders, and other construction equipment, the A4FO22 pump provides the hydraulic power needed for lifting, digging, and other high-force activities.
  • Agricultural Equipment: Tractors, harvesters, and other agricultural machines utilize these pumps for operations requiring precise hydraulic control, such as steering, lifting, and processing.
  • Manufacturing and Industrial: In industrial settings, the A4FO22 pump can be found in hydraulic presses, injection molding machines, and other equipment requiring precise control and reliability under high pressure.
  • Mobile Applications: Beyond stationary machinery, the pump is also used in mobile hydraulic systems where efficiency and variable displacement capabilities are critical for optimal performance.