Rexroth 32 series A10VSO71 axial piston hydraulic pump

The A10VSO71 is an axial piston pump of swashplate design with variable displacement. Unlike bent-axis units, the swashplate allows for faster response times and simpler control mechanisms. The “71” refers to the geometric displacement per revolution: 71 cm³/rev in the 32 Series (up from 63 in the 30 Series).

Control Options: From Simple to Smart

Not all A10VSO71 pumps come with the same behavior. Your choice of controller defines system efficiency.

DG-Direct Pressure Control

A simple pressure compensator. Once system pressure hits the set point, the pump swashes back to near-zero flow. Best for constant-pressure systems like test rigs.

DR-Remote Pressure Control

Same as DG but with an external pilot port. Allows pressure cut-off from a proportional relief valve.

DFR / DFL-Flow and Pressure Control (Load Sensing)

The most common configuration. The pump maintains a fixed pressure difference (Δp) across an orifice, typically 14–20 bar. This yields:

Power savings-Only delivers flow required by the actuators.

Thermal reduction-Less oil heating compared to fixed pumps.

Expert tip: If your application has multiple simultaneous movements (e.g., a log loader), choose DFR. If you have single high-torque movements (e.g., a press cylinder), DR may suffice.

Application Examples

Case A: Mobile Concrete Pump

A truck-mounted concrete pump uses two A10VSO71 DFR pumps. One drives the boom cylinders, the other the S-valve. Load sensing ensures the engine doesn’t stall when flow demand spikes. Result: 15% fuel savings vs. fixed-displacement systems.

Case B: Industrial Scrap Shear

A recycling shear requires 350 bar peak for cutting hardened steel. The A10VSO71 with DRG (remote pressure + pilot operation) provides pre-compression relief, avoiding pressure overshoot. Pump noise remained below 80 dBA after 12,000 hours.

Installation & Maintenance: Avoiding Common Failures

Suction Condition Is Everything

The A10VSO71 has a minimum inlet pressure of 0.8 bar absolute (at the flange). Starvation leads to slipper failure within hours. Always use:

A properly sized suction strainer (≤ 50 μm absolute)

No sharp 90° elbows before the inlet

A breather filter on the tank to prevent vacuum

Fluid Cleanliness-The Silent Killer

Rexroth demands ISO 4406 Class 18/16/13 (about NAS 7). Real-world data shows:

Class 20/18/15 → pump life reduced by 50%.

Water content > 0.1% → accelerated plate erosion.

Practical advice: Use offline kidney loop filtration and change return filters every 1,000 hours in dusty environments.

For more information on the A10VSO71 hydraulic pump, please visit https://www.baolilaihydraulic.com/product/.

Specifications

Selection Table

Q1: My pump rattles at low displacement (< 20%). Is that normal?

A1:Yes. At very low swash angles (< 5°), the pistons experience inertial loading. Reduce minimum displacement stop or add a small case drain line backpressure (2–3 bar).

Q2:What is the typical rebuild interval?

A2:Under clean oil and moderate duty (200 bar average), expect 8,000–12,000 hours before cylinder block or slipper wear necessitates a rebuild. High-continuous 280 bar duty: 5,000–7,000 hours.

Q3:How to purchase an A10VSO71 hydraulic pump?

A3:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.

Q4:What is the price and delivery time of the A10VSO71 hydraulic pump?

A4:The specific price and delivery time will be provided based on the specific model you provide.