Rexroth A11VLO Series Piston Pump | AA11VLO260DRS | AA11VLO130 AA11VLO190

The Rexroth A11VLO Series from LIC Hydraulic is a premier, high-pressure axial variable displacement piston pump designed for heavy-duty open-circuit systems. Models like the AA11VL0260DRS/11R/NZD12N00-S set the industry standard for suction performance and power density. Covering displacements from $130\text{cc}$ to $260\text{cc}$, this series is engineered to handle the most rigorous mining and construction tasks. We guarantee 100% mechanical interchangeability and subject every unit to 100% high-pressure load and response testing, ensuring peak performance at a continuous $350\text{ bar}$ rating.

Technical Configuration Details (e.g., AA11VLO260DRS)

• Displacement: $260\text{ cm}^3\text{/rev}$ (Options for 130, 145, 190 also available)

• Max Pressure: $350\text{ bar}$ ($5000\text{ psi}$) rated; $400\text{ bar}$ ($5800\text{ psi}$) peak

• Control Type: DRS (Pressure Control with Load Sensing)

• Rotation: R (Clockwise)

• Mounting: SAE Standard Flange

• Seals: High-performance Viton (FKM) for thermal stability

Key Technical Advantages

• Superior Self-Suction Capabilities: The A11VLO utilizes an optimized flow path and impeller design, allowing for higher operational speeds without the need for tank pressurization, simplifying the overall hydraulic circuit.

• Heavy-Duty High-Pressure Design: Built with a high-strength cast iron housing, this pump excels in high-duty cycle environments. It maintains tight tolerances and volumetric efficiency even under continuous $350\text{ bar}$ loads.

• Dynamic Response Control: The DRS controller enables the pump to adjust its stroke in milliseconds according to load demands. This minimizes energy waste, reduces heat generation, and provides the operator with precise machine control.

• Tandem Drive Versatility: Equipped with a robust through-drive capability, the A11VLO supports the mounting of additional pumps on the same shaft, providing a compact solution for multi-circuit power requirements.

Application Areas

• Mining: Main pumps for large excavators, hydraulic roof supports, and heavy-duty drilling rigs.

• Construction: Concrete pumps, crawler cranes, and rotary drilling rigs.

• Marine & Offshore: Dredger cutter drives and large-scale offshore crane systems.

• Industrial HPUs: Heavy-duty scrap balers, forging presses, and metal extrusion lines.

Expert Maintenance Tips

• Initial Priming & Air Bleeding: Always fill the pump housing with clean hydraulic oil through the highest drain port before startup. For large displacement pumps like the 260 series, ensuring the housing is free of air is critical to prevent catastrophic shoe-to-swashplate damage.

• Filtration Integrity: Maintain oil cleanliness to ISO 4406 18/16/13. We recommend installing a vacuum switch on the suction line to monitor for filter clogging, which can lead to cavitation in large-displacement units.

• Tandem Torque Verification: When utilizing the through-drive for a multi-pump setup, always calculate the total torque across the input shaft. The combined torque of all sections must not exceed the maximum allowable limit for the first section’s shaft.