About

Axial piston variable pump

A4VG

5.1 Performance descriptionThe axial piston variable pump generates, controls and regulates a hydraulic fluid flow. It is designed for mobile applications such as construction machinery.Refer to data sheet 92003 and the order confirmation for the technical data, operating conditions and operating limits of the axial piston unit.5.2 Product descriptionThe A4VG is an axial piston variable pump with swashplate design for hydrostatic drives in closed circuits. The flow is proportional to the drive speed and displacement. The flow can be steplessly changed by controlling the cradle (12). For axial piston units with swashplate design, the pistons are arranged axially relative to the drive shaft.In the closed circuit, the hydraulic fluid flows from the hydraulic pump to the consumer, e.g. hydraulic motor and from there directly back to the hydraulic pump. There is a high-pressure side and a low-pressure side which alternate depending on which side is under load

1 Drive shaft2 Retainer plate3 Stroking piston4 Control unit (using the EP as an example here)

Versatile Axial Piston Design for Demanding Applications

REXROTH HYDRAULIC PUMPS stand out for their advanced axial piston technology, suitable for both open and closed circuit operations. With options for variable displacement, high pressure tolerance, and multiple mounting types, these pumps adapt seamlessly to diverse industrial and mobile machinery applications. They support both clockwise and counterclockwise rotation, making them ideal for customized system designs in sectors like construction, marine, and agriculture.


Engineered for Reliability and Long Service Life

With ISO 9001:2015 certification and compliance with ISO 4406:1999 fluid cleanliness standards, every pump is built to provide dependable performance throughout its lifespan. The robust construction using premium materials, along with efficient pressure and flow compensator control systems, means minimal maintenance and extended service life, even under rigorous operational conditions.


Flexible Specification and Application

Each model in the A4VG, A10VSO, and A11VO series can be configured for specific voltage, direction of rotation, mounting, and sealing requirements. The pumps are compatible with a wide viscosity range (10 to 100 mm/s) and provide self-priming capabilities where needed. Available flow rates range from 10 to 250 L/min, suitable for both light and heavy-duty functions, making it easy to integrate them into any hydraulic system design.