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A4VG56
Rexroth
A4VG56 Axial Piston Pump – High-Power, Compact Drive for Demanding Hydrostatic Systems
The A4VG56 is a robust and compact variable displacement axial piston pump, engineered specifically for high-performance closed-circuit hydrostatic transmissions. Part of the proven A4VG series, its bent-axis design delivers exceptional power density, efficiency, and control versatility, making it the ideal drive solution for a wide range of medium-to-high power mobile and industrial machinery.
Primary Applications & Equipment:
This pump is designed as the core component of efficient hydrostatic drive systems in demanding applications, including:
Construction & Road Building Machinery: Medium-sized wheel loaders, asphalt pavers, compactors, and road planers.
Agricultural Equipment: Mid-range tractors, forage harvesters, and specialty agricultural vehicles.
Material Handling: Industrial forklifts, reach stackers, and terminal tractors.
Specialized Vehicles: Drilling rigs, forest harvesters, and airport ground support equipment.
Core Technologies & Design Features:
Efficient Bent-Axis Design: Utilizes a robust bent-axis principle, renowned for high power density, excellent starting torque, smooth operation, and long service life, even under continuous high-pressure operation.
Variable Displacement for Closed Circuit: Designed specifically for closed-loop systems, it provides infinitely variable flow output to control the speed and torque of hydraulic motors, enabling precise and responsive control of vehicle travel and implement functions.
Integrated Charge Pump & Valving: Typically incorporates a built-in gear-type charge (supercharge) pump and an integrated valve block containing essential components such as pressure relief valves (cross-port reliefs), a flush valve for cooling, and a pressure cutoff valve. This creates a compact, space-saving, and highly functional drive unit.
Versatile Control Options (Various Implementations): The A4VG56 platform supports multiple control types (e.g., hydraulic pressure control "HD", electro-proportional control "EP", mechanical servo control) to match different system architectures, from simple lever control to sophisticated electronic CAN-Bus interfaces.
High Power & Compact Footprint: Delivers high power output from a relatively compact and lightweight package, maximizing design flexibility for equipment manufacturers.
Engineered for Reliability in Demanding Environments:
Built to withstand the shocks, vibrations, and contamination challenges of mobile equipment, the A4VG56 ensures high reliability and maximum uptime. Its service-friendly design facilitates maintenance and contributes to a lower total cost of ownership.
Key Specifications (Typical):
Series: A4VG (Closed Circuit, Variable Displacement)
Displacement: 56 cm³/rev (Variable, maximum)
Maximum Operating Pressure (Closed Loop): Typically up to 400/450 bar (depending on control type and specific model variant).
Control Types Available: Can be configured with various controls (e.g., HD, DA, EP) to suit specific system requirements for pressure limitation, power control, or speed regulation.