Rexroth A10VSO71 Axial Piston Pump 280 Bar 78 L/min Hydraulic

The A10VSO71 is an axial piston variable displacement pump manufactured by Bosch Rexroth. It operates via a swashplate design, allowing adjustable flow rates by changing the swashplate angle. This pump is widely used in high-pressure hydraulic systems for industrial machinery, construction equipment, and marine applications due to its efficiency, compact structure, and pressure adaptability.

• Displacement (Vg max): 71 cm³/rev
• Nominal Pressure (p nom): 280 bar
• Maximum Pressure (p max): 350 bar
• Speed Range: Up to 2,200 rpm (at Vg max)
• Flow Rate (at nominal speed): 156 L/min
• Weight: ~33 kg (standard model)
• Control Options: Pressure cutoff (DR type), load sensing, or proportional control variants.

The A10VSO71DR variant features a pressure cutoff (DR control) mechanism. When system pressure reaches the preset cutoff value, the pump reduces its displacement to maintain constant pressure, minimizing energy consumption. Contrary to some misconceptions, the swashplate does not always return to the minimum angle; it adjusts dynamically based on flow demand while sustaining pressure.

This pump is ideal for:

• Hydraulic presses and injection molding machines
• Construction machinery (e.g., excavators, cranes)
• Marine and offshore systems
• Industrial hydraulic power units

• Low Flow/Output: Check for clogged filters, worn seals, or incorrect control settings
• Overheating: Verify fluid viscosity, cooling system, or excessive pressure settings
• Noise/Vibration: Inspect for cavitation, air ingress, or misalignment