Rexroth A11VLO190 Series Pump | A11VLO190LRDU2/11R-NZD12K02P-S | R902196118

The Rexroth A11VLO190 Series from LIC Hydraulic is a flagship variable displacement axial piston pump designed for heavy-duty open-circuit systems. Model A11VLO190LRDU2/11R-NZD12K02P-S (PN: R902196118) is renowned for its high power density and the integrated centrifugal charging pump, which ensures exceptional suction performance at high speeds. We guarantee 100% mechanical interchangeability and subject every unit to 100% power curve calibration and $400\text{ bar}$ peak pressure testing, delivering industrial-grade reliability.

Technical Configuration Details

• Displacement Sizes: $145\text{ cc}, 190\text{ cc}, 260\text{ cc/rev}$.

• Control Type (LRDU2): Composite control including Power Control (LR), Pressure Cut-off (D), and Hydraulic Proportional override (U2).

• Part Number: R902196118.

• Operating Pressure: Nominal $350\text{ bar}$ ($5100\text{ psi}$); Peak up to $400\text{ bar}$.

• Suction Characteristic: Integrated charge pump for high-speed, cavitation-free operation.

Key Technical Advantages

• Integrated Impeller Technology: The internal charge pump allows the A11VLO to operate at higher speeds compared to standard swashplate pumps, providing superior performance even when the reservoir is located below the pump level.

• Sophisticated LRDU2 Control: This logic automatically optimizes pump displacement against system pressure, preventing engine stalls and maximizing fuel or energy efficiency during peak loads.

• Full Through-Drive Capability: Engineered for versatility, the through-drive allows for $100\%$ torque transfer to auxiliary pumps, enabling compact and powerful tandem pump arrangements.

• Enhanced Bearing Durability: Designed for high-duty cycle industrial and mobile environments, the internal rotating group is supported by heavy-duty bearings to handle significant radial loads and extend MTBF (Mean Time Between Failures).

Application Areas

• Large Excavators: Primary power source for boom, arm, and bucket circuits.

• Rotary Drilling Rigs: Reliable high-pressure supply for the rotary head and winch systems.

• Industrial Extrusion Presses: High-flow, constant power supply for metal or plastic forming.

• Marine & Dredging: Powering heavy-duty winches and positioning hydraulics on offshore vessels.

Expert Maintenance Tips

• Case Drain Management: Proper drainage is critical for A11VLO pumps. The case drain back-pressure must be kept below $2\text{ bar}$. Excessive pressure will destroy the shaft seal and may lead to catastrophic failure of the slipper-retaining system.

• Filtration Integrity: Maintain fluid cleanliness to ISO 4406 18/16/13. Due to the high precision of the LRDU2 controller, even minor contamination can lead to control instability or erratic shifting.

• Cold Start Protocol: In cold environments, ensure the fluid is preheated or use a low-viscosity start-up procedure. The charge pump requires fluid within a specific viscosity range to prime the main piston group effectively.