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A4VG125
Rexroth
A4VG125 Axial Piston Pump – High-Efficiency, Heavy-Duty Power for Demanding Closed-Circuit Drives
The A4VG125 is a premium, high-capacity variable displacement axial piston pump, engineered to deliver maximum power and control in closed-loop hydrostatic transmission systems. Representing the upper echelon of the A4VG series, it combines large displacement with advanced control technology to provide robust, efficient, and intelligent drive solutions for the most demanding mobile and industrial applications.
Primary Applications & Equipment:
This heavy-duty pump is designed as the core power unit for high-torque drive systems in a wide range of powerful machinery:
Heavy Construction & Mining: Large wheel loaders, bulldozers, mining shovels, and heavy-duty drilling rigs requiring immense tractive effort.
Forestry & Material Handling: Large harvesters, forwarders, port cranes, and heavy forklifts.
Agricultural Machinery: High-horsepower tractors and self-propelled harvesting equipment.
Special Vehicles & Industrial Drives: Tunnel boring machines (TBMs), winch drives for marine applications, and large industrial test stands.
Core Technologies & Design Features:
Large-Displacement Bent-Axis Design: Utilizes a robust bent-axis principle with a displacement of 125 cm³/rev, delivering exceptionally high flow and torque output. This design ensures high power density, smooth operation, and excellent mechanical efficiency under continuous high-pressure loads.
Optimized Closed-Circuit Efficiency: Specifically engineered for closed-loop hydrostatic drives, minimizing internal losses and heat generation. This results in superior overall system efficiency, reduced fuel consumption, and enhanced operational economy for high-power machinery.
Integrated Electro-Hydraulic Control: Available with advanced electro-proportional (EP) control options, enabling precise, responsive, and programmable control of pump displacement via electrical signals. This allows for seamless integration into modern CAN-Bus or joystick-controlled systems, facilitating intelligent power management and superior operator handling.
Complete, Compact Drive Package: Incorporates a built-in gear-type charge pump for reliable circuit supercharging and a comprehensive integrated valve block. The valve block typically includes cross-port relief valves, flushing valves, and pressure cut-off functions, offering a space-saving and simplified system solution.
Built for Extreme Reliability: Constructed with heavy-duty components, including reinforced casings and oversized bearings, to withstand shock loads, high continuous pressure, and harsh operating environments, ensuring maximum durability and minimum downtime.
Engineered for Intelligent Performance & Superior Control:
The A4VG125 is engineered to deliver not only raw power but also intelligent, controllable power. Its advanced design and control options enable optimized machine performance, enhanced productivity, and reduced total cost of ownership through improved efficiency and reliability.
Key Specifications (Typical):
Series: A4VG (Closed Circuit, Variable Displacement)
Displacement: 125 cm³/rev (Variable, maximum)
Maximum Operating Pressure (Closed Loop): Up to 400/450 bar (specific rating depends on control type and model variant).
Control Options: Available with hydraulic servo control (HD), advanced electro-proportional control (EP), and other variants to meet precise system requirements for pressure, power, or speed regulation.