Rexroth A11VLO Series A11VLO260LRDU2 Hydraulic Piston Pump for concrete pumps and excavator

Product Overview:
The A11VLO260LRDU2 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 LRDU2 combined control (power control + pressure cutoff + hydraulic pilot 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, widely used in concrete pump trucks, large excavators, and mining machinery .

Technical Specifications:

Core Features:

• Robust Swashplate Design: The proven swashplate design with high-strength cast iron construction ensures reliable operation, excellent volumetric efficiency (up to 95%), and long service life in open circuit applications. Cast iron housing provides 30% higher load-bearing capacity than aluminum alternatives and superior vibration damping .

• LRDU2 Combined Control: Advanced control system combining power control (externally adjustable even when the pump is running), pressure cutoff for system protection, and hydraulic pilot control for precise displacement adjustment—delivering comprehensive system management for complex machinery .

• Designed for Mobile Applications: Primarily engineered for use in demanding mobile applications, with rugged construction to withstand harsh operating conditions including extreme temperatures, vibrations, and shock loads .

• 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 (gear pumps or smaller axial piston pumps) up to the same nominal size, enabling flexible and space-saving multi-circuit system configurations .

• Optional Charge Pump (Impeller): For applications requiring enhanced suction performance or higher speeds, an optional built-in charge pump (impeller version AVLO) is available .

• High Power Density: Delivers up to 349 kW of power at max flow with excellent power-to-weight ratio, maximizing machine performance in heavy-duty applications .

• Low Noise Operation: Noise-optimized design with new housing incorporating reinforcing support ribs and optimized distribution plate reduces noise emission by up to 8 dB(A) compared to similar products .

• Excellent Suction Characteristics: Superior self-priming performance ensures reliable operation even in demanding conditions and at higher speeds, minimizing cavitation risks .

• Durability: High-quality materials and stringent quality control processes ensure long service life in demanding continuous operation, with MTBF exceeding 15,000 hours .

Main Applications (Suitable Equipment):
The A11VLO260LRDU2 is 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

• Trailer concrete pumps and vehicle-mounted 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 

• Rotary drilling rigs 

3. Mining & Tunneling Machinery:

• Mining machinery and coal mining equipment 

• Roadheaders and boom-type tunneling machines 

• Tunnel boring machines (TBM) and shield tunneling machines 

• Rock drilling rigs and foundation equipment

4. Heavy Industrial Machinery:

• Hydraulic presses and forging equipment 

• Metallurgical equipment and steel mill machinery 

• Large injection molding machines - main hydraulic power

5. Specialty Applications:

• Wet shotcrete machines and concrete spraying equipment 

• Hydraulic power units for heavy industry

• Marine and offshore hydraulic systems

• Petroleum and oil field equipment