Rexroth A10VSO71 Hydraulic Piston Pump 280 Bar Variable Axial

A10VSO71DRG/31R-VRC92K08 A10VSO71DRG/32R-VKD72U99 A10VSO71DRS/32R-VKD72U99 A10VSO71FE1D/31R-VKC92N00 A10VSO71LA7D/32R-VKD72U99 Rexroth hydraulic pump motor German original axial piston pump

FAQ:

1. What is the A10VSO71 series?

The A10VSO71 is a variable displacement axial piston pump with a swashplate design, designed for hydrostatic transmission in open circuits. It offers stepless flow regulation by adjusting the swashplate angle and is widely used in high-power hydraulic systems for industrial and mobile applications, such as construction machinery, metallurgy, and marine equipment.

2. What are the key features of the A10VSO71 pump?

• Pressure Range: Nominal pressure of 280 bar, peak pressure of 350 bar.

• Flow Control: Flow is proportional to drive speed and displacement, adjustable via swashplate angle.

Efficiency: Energy saving modes (e.g. pressure/low/power control) reduce energy consumption by 30% compared to fixed pumps

Durability: Fluorocarbon (FKM) shaft seals, fluid hydrostatic bearing technology, and low noise design

Versatility: Supports through shaft drive for additional pump installation

3. What control options are available?

The series offers multiple control modes:

• DR/DRG: Pressure control (direct or remote).

DFR: Pressure and Flow Composite Control

DFLR: Integrated Control of Pressure, Flow, and Power

• ED/EP: Electrohydraulic proportional control.

4. How to install the pump correctly?

• Orientation: Prefer horizontal shaft mounting; Vertical installation requires rough oil priming and air blending

Drain Lines: The shell drain ports (L1/L2) must be separately led to the fuel tank, with a back pressure of ≤ 0.5 bar

Success Pressure: Maintain ≥ 0.8 bar absolute at the inlet (≥ 0.5 bar during cold start)

Piping: Use SAE standard flange ports and vibration solubilizing connectors

5. What are common faults and their solutions?

Low/No Flow: Check for clogged suction pipe, leaks, or low tilt angle of the inclined plate

Pressure Fluctuations: Inspect to control piston wear or foreign objects entering the variable mechanism

Overheating: Verify oil cleanliness (NAS ≤ 9) and cooling system

Leakage: Replace damaged shaft seal or check drain pipe design

Noise: Ensure proper oil suction pressure and coupling alignment

6. Maintenance recommendations?

Oil Quality: Use ISO VG 46 anti-wear hydraulic oil and regularly test for contamination

Seals: Inspect shaft seals every 2000 hours to shorten the cycle in high temperature environments

Long Storage: Drain oil and add rust inhibitor

7. Where is the A10VSO71 typically applied?

• Industrial: Metallurgy, presses, plastic injection machines.

• Mobile: Concrete pump trucks, excavators, deck machinery.

Energy Sensitive Systems: Cranes, winches with power control requirements

For further details, consult official manuals (e.g., RE92706-01-B) or contact authorized suppliers.

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Note: Specifications may vary by model (e.g., A10VSO71DFR vs. A10VSO71DRG). Always confirm parameters before installation.

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