Rexroth A4VG & A4VTG Series Pump | A4VG71, A4VG125, A4VG250 | Closed Circuit Piston Pump

Rexroth A4VG & A4VTG Series High-Pressure Closed Circuit Piston Pump

Product Overview: The Rexroth A4VG series (and the drum-drive optimized A4VTG series) represents the gold standard in global hydrostatic transmissions. Engineered specifically for Closed Circuit systems, these pumps are widely utilized in concrete mixer drum drives, harvester travel systems, and heavy-duty rollers. From the compact A4VG40 to the massive A4VG250, these pumps integrate charge pumps and pressure valves, delivering unmatched power density and reliability for precision driving under demanding conditions.

Key Technical Advantages:

• Advanced & Diverse Control Logic: This series supports various modulation methods. Models like the A4VG71 EZ2D utilize electronic two-solenoid proportional control; the A4VG125HD3 features hydraulic servo control; and the A4VG250EP2 stands for advanced electric proportional adjustment, ensuring smooth, jerk-free maneuvers.

• Excellence Under High Pressure: Rated for operating pressures up to 400 Bar (40 MPa), with peaks reaching 450 Bar. Reinforced piston groups and swashplate structures guarantee an extended service life, even in frequent-reversal applications like the A4VTG90 mixer drive.

• Integrated System Efficiency: The pump housing integrates a charge pump and dual high-pressure relief valves. Models like the A4VG40EP4DM1 demonstrate an ultra-compact envelope, significantly simplifying chassis hydraulic plumbing and reducing potential failure points.

• 100% Industrial Precision Match: Strictly designed according to Series 32 standards. Whether featuring NZF/NSD mounting flanges or specific shaft splines, these components ensure a perfect “drop-in” replacement for original assemblies, minimizing downtime.

Specific Models & Technical Parameters:

• Core Series: A4VG71, A4VG125, A4VG250, A4VTG90, A4VG40.

• Detailed Configurations:

  • A4VG71 EZ2D1/32RNZF001SP

  • A4VG125HD3D2/32L-NZF02F041P-S

  • A4VG250EP2D1/32R-NSD10F001DH

  • A4VTG90EP2/32R-NLD10F011SGT-S

  • A4VG40EP4DM1/32R-NSC02F005DP

• Displacement Range: 40 cm³/rev to 250 cm³/rev.

• Pressure Specs: Rated at 400 Bar (40 MPa); Peak at 450 Bar.

• Applications: Concrete mixer drives, combine harvesters, heavy excavator travel drives, and hydrostatic roller systems.