Rexroth A4VG56 Series Pump | A4VG56HD3, A4VG56EZ2 | 400 Bar Closed Circuit Piston Pump

Rexroth A4VG56 Series (Series 32) Closed Circuit Variable Piston Pump

Product Overview: The Rexroth A4VG56 is a premium variable displacement axial piston pump engineered for Closed Circuit hydrostatic transmissions in mobile machinery. As a key member of the proven Series 32, it offers a balanced displacement of 56 cm³/rev. Delivering precise flow and directional control under continuous pressures of 400 Bar, the A4VG56 is the preferred power source for heavy-duty applications. Flagship models such as the A4VG56HD3 (Hydraulic Pilot Control) and A4VG56EZ2 (Electric Proportional Control) integrate charge pumps and high-pressure relief valves, providing superior traction and maneuverability for rotary drilling rigs, pavers, and concrete pump trucks.

Key Technical Advantages:

• Superior Power Density: Delivers a rated pressure of 400 Bar (5800 PSI) and peak capabilities of 450 Bar within a remarkably compact footprint, ensuring robust performance during heavy-duty incline starts.

• Precision Control Modalities (HD / EZ):

  • HD3 Hydraulic Control: Adjusts displacement via pilot pressure, offering rapid response and high reliability in traditional construction machinery systems.

  • EZ2 Electric Control: Features proportional solenoid modulation for seamless integration with Electronic Control Units (ECUs), enabling smart travel and automated speed matching.

• Highly Integrated Components (NZC / NSC): Internally houses the charge pump, high-pressure relief valves, and cut-off valves, drastically simplifying external plumbing and minimizing potential leak points.

• Exceptional Efficiency: Optimized valve plate technology suppresses fluid pulsations and operating noise while maintaining peak volumetric efficiency across the entire speed range.

• Through-Drive Capability (F025 / F003): Supports tandem mounting of secondary pumps (piston or gear) to power auxiliary functions like steering or braking systems.

Detailed Models & Parameters:

• Core Series: Rexroth A4VG Series 32.

• Representative Models: A4VG56HD3DT1/32L-NZC02F025S, A4VG56EZ2DM1/32R-NSC02F003FP.

• Displacement: 56 cm³/rev.

• Rated Pressure: 400 Bar (5800 PSI).

• Peak Pressure: 450 Bar (6525 PSI).

• Rotation: L (Counter-clockwise); R (Clockwise).