Rexroth A4VG Series Pump | A4VG56, A4VG90, A4VG125, A4VG250 | Excavator Travel Pump | A4VG56DWDT1

Rexroth A4VG Series High-Pressure Closed Circuit Piston Pumps for Excavators

Product Overview: The Rexroth A4VG series is the powerhouse behind global excavator hydrostatic travel drive systems. Specifically engineered for closed-circuit applications, this series integrates the boost pump, high-pressure relief valves, and auxiliary valves, greatly simplifying the overall hydraulic layout. The range covers displacements from the mainstream 56cc (A4VG56) up to the high-power 250cc (A4VG250). The featured model A4VG56DWDT1/32R-NZC02F003D-S is optimized for excavator environments, delivering smooth and robust power output at a rated pressure of 400 Bar, ensuring superior climbing ability and steering agility in harsh operating conditions.

Key Technical Advantages:

• Highly Integrated Closed-Loop Design: Built-in charge (boost) pump and full valve functions minimize external piping, reducing potential leakage points and enhancing machine reliability.

• Intelligent DW Control: The DW (Speed-related control) automatically modulates pump displacement based on engine RPM and load, ensuring smooth power distribution and preventing engine stalling.

• Extreme High-Pressure Durability: Rated for continuous operation at 400 Bar (5800 PSI) with peak capabilities up to 450 Bar, meeting the demands of high-frequency reversals and heavy-duty cycles.

• Superior Power-to-Weight Ratio: Optimized for the Series 32 platform, the compact design is ideal for the confined pump compartments of modern excavators.

• Customized Specifications (-S): Supports specialized configurations (e.g., NZC02F003D-S) to ensure a perfect “drop-in” fit with chassis reducers from major excavator brands.

Detailed Models & Parameters:

• Core Series: Rexroth A4VG Series 32 & 40 (Closed Circuit).

• Full Displacement Range: A4VG45, A4VG56, A4VG71, A4VG90, A4VG125, A4VG180, A4VG250.

• Control Modalities: DW (Speed related), EP (Electric proportional), DA (Hydraulic speed control).

• Model Keywords: A4VG56DWDT1/32R, NZC02F003D-S.

• Pressure Ratings: Rated at 400 Bar (5800 PSI) continuous; Peak capability up to 450 Bar (6500 PSI).

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

• Target Applications: Crawler excavator travel drives, wheeled excavator drives, rotary drilling rigs, and heavy material handlers.