Rexroth AA11VLO260LRDH2 Hydraulic Piston Pump for Large Excavators Heavy-Duty Mining Machinery

The AA11VLO260LRDH2 is a high-performance swashplate design axial piston pump from the renowned Rexroth A11VLO series . Specifically engineered for open circuit hydraulic systems, this variable pump delivers exceptional power density, reliable operation, and precise control under extreme loads . With a displacement of 260 cm³/rev and advanced LRDH2 combined control (power control + pressure cutoff + hydraulic control), it provides stepless, energy-efficient flow adjustment for demanding mobile and industrial applications . This unit is a direct, high-quality replacement solution for original Rexroth equipment, with material number R902064039 / R902275552 .

Technical Specifications:

• Model: AA11VLO260LRDH2

• Type: Swashplate design, variable axial piston pump

• Displacement: 260 cm³/rev (steplessly variable from Vg max to Vg min = 0) 

• Nominal Pressure: 350 bar (continuous operation) 

• Maximum Pressure: 400 bar (peak) 

• Maximum Speed: 1800-2300 rpm (depending on configuration) 

• Flow Rate: Up to 468 L/min (at max speed) 

• Control Type: LRDH2 - Combined power control + pressure cutoff + hydraulic pilot control

• Design: For open circuit hydraulic systems 

• Operating Mode: Self-priming conditions, with tank pressurization, or with optional built-in charge pump (impeller) for higher speeds 

• Through-Drive: 100% through drive suitable for adding gear pumps and axial piston pumps up to the same nominal size 

• Mounting Flange: SAE / ISO 3019-1 standard (SAE version for US market compatibility) 

• Weight: Approximately 125-138 kg 

• Material: Robust cast iron construction 

• Temperature Range: -25°C to +115°C (with FKM shaft seal) 

Core Features:

• Robust Swashplate Design: The proven swashplate design with cast iron construction ensures reliable operation, excellent efficiency, and long service life in open circuit applications. Features robust bearing system and high-quality materials for demanding continuous operation .

• LRDH2 Combined Control: Advanced control combining power control (externally adjustable even when pump is running), pressure cutoff for system protection, and hydraulic pilot control for precise displacement adjustment - providing comprehensive system management .

• Designed for Mobile Applications: Primarily engineered for use in demanding mobile applications, with rugged construction to withstand harsh operating conditions .

• Stepless Variable Displacement: Output flow is proportional to drive speed and infinitely variable between Vg max and Vg min = 0, offering precise flow matching to reduce energy consumption and heat generation .

• 100% Through-Drive Capability: Universal through-drive design allows mounting of additional pumps up to the same nominal size, enabling flexible and space-saving multi-circuit system configurations .

• Exceptional High-Speed Capability: Particularly high speeds are possible with impeller pump version (AVLO), enhancing performance in demanding applications .

• Flexible Installation Options: Operates under self-priming conditions, with tank pressurization, or with optional built-in charge pump (impeller) for enhanced suction performance at higher speeds .

• High Power Density: Delivers 273 kW of power at max flow and 350 bar pressure, providing exceptional power-to-weight ratio .

• Low Noise Operation: Optimized design ensures low noise levels during operation, meeting stringent workplace noise regulations .

• High Efficiency: Volumetric efficiency up to 95% minimizes energy loss and reduces operating costs .

Main Applications (Suitable Equipment):
The AA11VLO260LRDH2 is widely recognized as the specialized high-power unit for heavy machinery requiring high-pressure, variable flow hydraulics. It is extensively used in:

1. Concrete Pump Trucks (Primary Application):

• Main hydraulic pump for large concrete pump trucks (37m-56m boom pump trucks) 

• SANY, Zoomlion, Putzmeister, and Schwing concrete pump trucks - standard main pump configuration 

• Truck-mounted concrete pumps and stationary concrete pumps

• Concrete placing booms and line pumps

2. Large Excavators & Construction Machinery:

• Main hydraulic pump for large excavators (30-50 ton class) 

• Material handlers and crawler excavators

• Crawler cranes and heavy lifting equipment 

• Roadheaders and boom-type tunneling machines 

3. Mining & Heavy Industry:

• Mining machinery and coal mining equipment 

• Rotary drilling rigs 

• Heavy industrial machinery and presses 

• Metallurgical equipment and steel mill machinery 

4. Foundation & Drilling Equipment:

• Piling rigs and foundation machinery 

• Tunnel boring machines (TBM) 

• Rock drilling rigs 

5. Specialty Applications:

• Hydraulic power units for heavy industry 

• Mobile cranes and crawler cranes 

• Marine and offshore hydraulic systems 

• Pile machinery and foundation equipment