A11VLO130LE2S/10L-NZD12K02P-K Rexroth Piston Pump 130cc 350bar

Product Overview

The A11VLO130LE2S/10L-NZD12K02P-K is a Bosch Rexroth A11VLO Series swashplate-type axial piston variable displacement pump. The A11VLO Series is Rexroth’s all-purpose high-pressure pump line for open-circuit hydrostatic drives, covering eight displacement sizes from 40 to 260 cm³/rev. The A11VLO130 delivers a maximum displacement of 130 cm³/rev.

This model features LE2S control—an integrated control combining Load Sensing, Power Control, and Electric Override functionality. The LE2S control automatically adjusts displacement in response to system load changes for on-demand flow distribution, while power control limits maximum input power to prevent prime mover overload, and electric override enables remote intervention via electrical signals. 10L denotes the Series 10 design platform with Left-hand rotation configuration. NZD12K02P-K is the shaft, mounting flange, and port configuration code. R902155616 is the corresponding Rexroth material number.

As a direct OEM-equivalent replacement solution for the Bosch Rexroth A11VLO Series, this product offers complete in-situ interchangeability, strictly adhering to Rexroth’s original design specifications and mounting interface standards. Every unit undergoes 100% simulated duty-cycle testing, ensuring that key performance metrics—including volumetric efficiency, pressure-flow characteristics, and case drain flow at rated pressure and full displacement—meet or exceed original factory specifications.

Technical Specifications 

• Model Number: A11VLO130LE2S/10L-NZD12K02P-K

• Rexroth Material Number (MAT. NO.): R902155616

• Brand Series: Bosch Rexroth A11VLO Series (Series 10)

• Pump Type: Swashplate Axial Piston Variable Displacement Pump (Open Circuit)

• Maximum Displacement: 130 cm³/rev

• Rated Pressure (Continuous): 350 bar

• Peak Pressure (Intermittent): 400 bar

• Maximum Speed (at Vg max): Approx. 2100–2500 rpm (application dependent)

• Theoretical Flow (2100 rpm, Vg max): Approx. 273 L/min

• Control Type: LE2S – Load Sensing + Power Control + Electric Override

• Rotation Direction: L – Left-hand (counter-clockwise from shaft end)

• Mounting Type: SAE Flange Mounting (NZD12 configuration series)

• Shaft Type: Splined Shaft (DIN 5480)

• Self-Priming Capability: Self-priming, tank-pressurized, or with built-in charge pump

• Through-Drive Capability: 100% through-drive for gear pumps or axial piston pumps of the same size

• Flow Adjustment: Infinitely variable from qV max to qV min = 0

• External Adjustment: Power setting adjustable externally, even during operation

• Housing Material: High-strength Cast Iron

• Hydraulic Fluid: Mineral Oil

• Recommended Filtration: ISO 18/15 or higher

• Weight: Approx. 66–72 kg (configuration dependent)

Key Technical Advantages

1. LE2S Integrated Control – Load Sensing + Power Control + Electric Override in One
The LE2S control configuration integrates Load Sensing control, Power Control, and Electric Override functionality into a single control unit. Load sensing ensures pump output flow precisely matches system load demand, delivering on-demand flow distribution with zero overflow losses and significant system-level energy savings; power control limits maximum input power to prevent prime mover overload; and electric override enables remote intervention via 24V electrical signals. Together, these three functions achieve both system-level energy efficiency and protection for both the prime mover and hydraulic system.

2. 350 bar Rated Pressure with 400 bar Peak Capacity
The A11VLO130 delivers a rated working pressure of 350 bar with peak pressures up to 400 bar. At 130 cm³/rev displacement, it outputs approximately 273 L/min theoretical flow (at 2100 rpm) and substantial hydraulic power, providing ample power reserves for medium to large mobile equipment.

3. 100% Through-Drive for Flexible Multi-Pump System Expansion
The A11VLO Series features 100% through-drive capability as standard, allowing gear pumps or axial piston pumps of the same size to be mounted directly on the rear of the pump. This design enables the A11VLO130LE2S/10L-NZD12K02P-K to serve as the lead pump in multi-pump systems, providing drive power for subsequent pump stages and significantly simplifying system layout while saving installation space.

4. Superior Self-Priming Capability with Flexible Inlet Conditions
The A11VLO Series supports self-priming operation, tank-pressurized operation, and an optional built-in charge pump. This design significantly enhances cavitation resistance at high speeds, ensuring stable flow output even under challenging inlet conditions—including cold starts, high-altitude operation, and low inlet pressure scenarios.

5. Externally Adjustable Power Setting with Broad Flow Regulation Range
The A11VLO Series allows power setting adjustment from outside the pump, even while the pump is in operation. Output flow is infinitely variable between maximum displacement and zero displacement. This feature provides exceptional flexibility for on-site commissioning and system optimization.

6. High-Precision Friction Pairs for Extended Service Life
The A11VLO Series incorporates proven high-precision friction pair designs combined with optimized bearings and rotating groups, ensuring long-term reliability under continuous high-load operating conditions. Rexroth original quality standards and 100% through-drive capability together form the technical foundation that makes this series a benchmark in heavy-duty mobile equipment applications.

Application Areas

• Rotary Drilling Rigs: Primary pump providing high-pressure, high-flow hydraulic power for drilling and lifting operations

• Concrete Pump Trucks: Delivering stable, continuous high-pressure hydraulic power for pumping systems

• Large Excavators: Meeting the combined flow and pressure demands of heavy excavation operations

• Mining Equipment: Suitable for roadheaders, scraper loaders, and other equipment operating in high-dust, high-vibration extreme environments

• Agricultural Machinery: Hydrostatic drives for large combine harvesters and forage harvesters

• Industrial & Specialized Applications: Injection molding machines, hydraulic presses, port cranes, and other scenarios with stringent hydraulic power stability requirements

Expert Maintenance Tips

1. Model Confirmation & Pre-Installation Inspection: Prior to installation, confirm the complete model code as A11VLO130LE2S/10L-NZD12K02P-K with Rexroth material number R902155616. This is a Series 10 left-hand rotation configuration—pay special attention to matching the rotation direction with the host machine PTO. Verify that the SAE flange mounting specification and splined shaft type (DIN 5480) match. Manually rotate the shaft before installation to confirm smooth, obstruction-free rotation.

2. Fluid Cleanliness Control: The A11VLO Series recommends a minimum filtration rating of ISO 18/15. Replace hydraulic fluid and filters every 1,000–2,000 hours. Complete system flushing is mandatory before initial start-up.

3. LE2S Controller Tuning: The LE2S control configuration integrates load sensing, power control, and electric override functions. Commissioning should follow this sequence:

   • Load Sensing Setting: Set the LS differential pressure (typically 14–20 bar) based on maximum system load demand

   • Power Control Setting: Set the maximum input power limit based on prime mover rated power to prevent overload

   • Electric Override Test: Verify that the 24V electrical signal correctly intervenes in control characteristics
     Perform initial settings under no-load conditions, then gradually increase load to target operating conditions with fine adjustments.

4. Left-Hand Rotation Port Identification: This model features left-hand rotation—suction and pressure port positions are reversed compared to right-hand versions. During installation, carefully cross-reference piping diagrams to ensure suction and pressure lines are correctly connected to the corresponding ports.

5. Initial Start-Up & Priming: Before first start-up, pre-lubricate the pump by filling the housing with clean hydraulic fluid through the case drain port. Perform a brief jog start (5–10 seconds) to confirm correct rotation direction (left-hand), and check for abnormal noise or leakage. Then正式 start the pump and run at low load for several minutes to purge air from the pump and system lines.

6. Case Drain Port Positioning & Pressure Monitoring: During installation, ensure the drain port is positioned higher than the pump body to prevent oil starvation in the pump chamber after shutdown. Case pressure must not exceed 1.5 bar (absolute) . Install a pressure gauge on the case drain line for real-time monitoring.