HL-A4VG HYDRAULIC PUMPS
Variable Displacement Axial Piston Pump for Closed Circuit

Variable Displacement Axial Piston Pump for Closed Circuit

The HL-A4VG variable displacement pump is designed for precision, reliability, and efficiency in closed-loop hydraulic systems. It ensures smooth control, rapid response, and high-pressure output, making it ideal for demanding applications in mobile and industrial machinery.

  • Displacement 40-180 cm³/rev
  • Nominal pressure 400 bar
  • Max. allowable pressure 450 bar
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Technical Data
Size 40 56 71 90 125 180
Displacement (variable pump) Vgmax cm³/rev 40 56 71 90 125 180
Displacement (boost pump) Vg Sp cm³/rev 8.8 11.8 19.8 19.8 28.5 40
Max. rotation speed nmax rpm 4000 3600 3300 3000 2800 2500
Min. rotation speed nmin rpm 500 500 500 500 500 500
Max. flow at n=nmax L/min 160 201.6 234.3 270 350 450
Max. power at n=nmax
V=Vg max (Δp=400 bar) 		kW 106.6 134.4 156.2 180 233.3 294
Max. torque at V=Vgmax (Δp=400 bar) Nm 254.4 356 451.5 572.4 795 1146.5
Case volume V L 1.1 1.5 1.5 1.5 2.2 3.2
Weight kg 32 39 50 61 82 102
Features
  • Optimized for Closed-Circuit Systems Engineered for hydrostatic drive applications in mobile machinery, ensuring seamless performance under heavy loads.
  • Precise Flow Control Adjusts flow proportionally to pump speed and displacement for smooth operation.
  • Seamless Variable Adjustment Swashplate angle allows infinitely adjustable displacement control for greater precision.
  • Stable Flow Reversal Zero-passage swashplate transition ensures smooth directional changes without pressure spikes.
  • Built-in Overload Protection High-pressure relief valves protect pumps and motors from excessive loads, enhancing system safety.
  • Integrated Auxiliary Pump Provides boost pressure and control oil to maintain system stability.
  • Pressure Limiting Valve Built-in relief system prevents excessive boost pressure for optimized performance.
  • High-Precision, Long-Lasting Components Reinforced internal structures and premium bearings ensure extended durability.
  • Reliable Sealing System PARKER sealing components prevent leaks and maintain consistent performance in extreme conditions.
  • Control Mode HW, DA1, DA2, HD1, HD3
Applications
Construction Machinery
Construction Machinery
Mining and Quarrying Equipment
Mining and Quarrying Equipment
Agricultural Machinery
Agricultural Machinery
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