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A11VLO130LRDU2
Product Overview:
The A11VLO130LRDU2 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 130 cm³/rev and the advanced LRDU2 combined control (power control + pressure cutoff + electric proportional 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.
Technical Specifications:
| Parameter | Value |
|---|---|
| Model | A11VLO130LRDU2 (Series 1) |
| Type | Swashplate design, variable axial piston pump |
| Displacement | 130 cm³/rev (steplessly variable from Vg max to Vg min = 0) |
| Nominal Pressure | 350 bar (5000 psi) |
| Maximum Pressure | 400 bar (5800 psi) |
| Peak Pressure | Up to 450 bar depending on configuration |
| Maximum Speed | 2500-2700 rpm (depending on control configuration) |
| Flow Rate | Up to 273 L/min (at rated speed) |
| Power Rating | Up to 190 kW at 350 bar |
| Torque | 724 Nm at 350 bar |
| Control Type | LRDU2 - Combined power control + pressure cutoff + electric proportional remote control |
| Design | For open circuit hydraulic systems |
| 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 |
| Shaft Type | Splined shaft for direct engine coupling |
| Port Connection | Side ported with SAE flange ports |
| Weight | Approximately 66-72 kg (depending on configuration) |
| Material | High-strength cast iron construction with hardened steel internal components |
| Temperature Range | -20°C to +95°C |
| Seal Material | FKM / NBR options available |
Core Features:
LRDU2 Combined Control: Advanced control system combining power control (externally adjustable even when the pump is running), pressure cutoff for system protection, and electric proportional remote control for precise displacement adjustment. This "smart brain" system continuously monitors output pressure and automatically adjusts displacement to maintain constant power, preventing engine overload under heavy loads while optimizing performance during lighter loads. The LRD designation indicates: L (power control), R (pressure cutoff), and D (electric proportional remote control).
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.
High-Pressure Capability: Delivers 350 bar nominal and up to 450 bar peak pressure, meeting the most demanding mobile and industrial application requirements.
Excellent Suction Characteristics: Superior self-priming performance ensures reliable operation even in demanding conditions and at higher speeds. The A11VLO variant includes a built-in centrifugal charge pump (impeller) for high-speed applications.
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.
Electric Proportional Remote Control: The "D" suffix allows operators to precisely control pump displacement via an electronic joystick in the cab. This not only reduces operator fatigue but also provides the interface for intelligent construction and remote-controlled operation, making it a key enabler for smart machinery applications.
Low Noise Operation: Optimized distribution plate design and advanced housing with reinforcing support ribs effectively reduce fluid pulsation, achieving significantly lower noise levels compared to conventional pumps.
Durability: High-quality materials and stringent quality control processes ensure long service life in demanding continuous operation. Critical friction pair components undergo special surface treatments and precision matching for extended life even under 24/7 high-intensity operation.
Main Applications (Suitable Equipment):
The A11VLO130LRDU2 is the specialized power unit for medium-to-heavy machinery requiring high-pressure, variable flow hydraulics. It is extensively used in:
Concrete Pump Trucks (Primary Application):
Main hydraulic pump for concrete pump trucks and trailer pumps - SANY, Zoomlion, and Putzmeister concrete pump truck main oil pump configuration
Truck-mounted concrete pumps and stationary concrete pumps
Concrete placing booms and shotcrete machines
Large Excavators & Construction Machinery:
Main hydraulic pump for large excavators (25-35 ton class)
Crawler excavators and material handlers
Wheel loaders and backhoe loaders
Road rollers and compaction equipment
Rotary Drilling Rigs & Foundation Equipment:
Power head drives for rotary drilling rigs - main winch and crowd system drive
Piling rigs and foundation machinery
Tunnel boring machines (TBM) and roadheaders
Mining Machinery:
Mining equipment and coal mining machinery
Rock drilling rigs and blast hole drills
Underground mining vehicles and loaders
Crane & Heavy Lifting Equipment:
Crawler cranes and mobile cranes - telescopic boom and swing systems
Material handlers and heavy lifting equipment
Industrial Machinery:
Large hydraulic presses and injection molding machines
Metallurgical equipment and steel mill machinery
General industrial hydraulic power units
Marine & Offshore Applications:
Marine hydraulic systems - winch drives and deck machinery
Offshore equipment and port machinery
Specialty Applications:
Forestry equipment and harvesters
Agricultural machinery and large tractors
Petroleum and oil field equipment