Rexroth A11VLO190 Variable Pump | R902233541 | A11VLO190LE2S/11L-NSD12K02P

The Rexroth A11VLO190 Series from LIC Hydraulic is the definitive high-pressure axial piston pump for demanding open-circuit applications. This specific model, A11VLO190LE2S/11L-NSD12K02P (Part No. R902233541), is engineered for superior performance in heavy construction and industrial machinery. The “L” designation signifies an integrated impeller (charge pump), ensuring exceptional self-priming capabilities at high shaft speeds. We guarantee 100% mechanical interchangeability and subject every unit to 100% full-load efficiency testing and precise LE2S control calibration.

Technical Configuration Details

• Displacement: $190\text{ cc/rev}$ for high-flow requirements.

• Pressure Rating: Continuous $350\text{ bar}$ ($5100\text{ psi}$); Peak $400\text{ bar}$.

• Control Type (LE2S): Advanced power control with electronic override for optimized fuel efficiency.

• Through Drive: Equipped with NSD coupling, allowing for secondary pump tandem mounting.

Key Technical Advantages

• Enhanced Self-Priming: The built-in impeller allows the pump to operate at higher speeds compared to standard A11VO models without the risk of cavitation, making it ideal for engine-driven mobile applications.

• Robust Swash-Plate Design: Optimized for high-frequency load cycles, the internal rotating group features hardened surfaces that resist wear under the most grueling 24/7 operation.

• Precise Power Management: The LE2S control system minimizes “dead power” by adjusting the swash plate angle in real-time based on system pressure, reducing thermal load and increasing the overall machine life.

• Low Noise Characteristics: Precision-engineered porting and internal damping structures ensure that even at peak pressure, the A11VLO maintains a professional, low-decibel operational profile.

Application Areas

• Heavy Excavators: Primary hydraulic power for 40-80 ton class machines.

• Concrete Pumps: High-pressure delivery systems for skyscraper construction.

• Offshore & Mining: Reliable power supply for winches, drill rigs, and heavy-duty industrial presses.

Expert Maintenance Tips

• Initial Priming: Before startup, the pump housing must be filled with filtered hydraulic oil through the highest case drain port. “Dry starts” will cause catastrophic failure of the piston shoes within seconds.

• Case Pressure Regulation: Always use a dedicated case drain line returned directly to the reservoir. Ensure back-pressure stays below $2\text{ bar}$ to preserve the integrity of the high-pressure shaft seal.

• Suction Line Integrity: Even with the impeller, ensure the suction line is fully sealed and unrestricted. Air ingress is the primary cause of controller instability and premature erosion of the cylinder block.