A11VLO130LRDH1/10R-NZD12K07 Rexroth Piston Pump 130cc 350 bar

Product Overview

The A11VLO130LRDH1/10R-NZD12K07 is a Bosch Rexroth A11VLO series swashplate axial piston variable displacement pump. With a maximum displacement of 130 cm³/rev, rated operating pressure of 350 bar, and peak pressure of 400 bar, this open-circuit pump is engineered for hydrostatic drive systems in mobile and industrial applications.

This product offers a 100% genuine OEM-interchangeable solution, manufactured to Bosch Rexroth’s original quality standards. Every unit undergoes 100% simulated working condition testing—covering rated pressure, peak pressure, and full speed range—to ensure field reliability matching original equipment performance.

The pump features LRDH1 compound control, integrating load-sensing control, pressure cutoff, and torque limiter in a single control unit. The housing is constructed from high-strength cast iron with a built-in impeller-type charge pump for enhanced cavitation resistance at high speeds. Output flow is proportional to drive speed and infinitely variable between Vg max and Vg min = 0. The 100% through-drive capability allows direct series mounting of gear pumps or axial piston pumps up to the same nominal size.

Technical Specifications

• Model: A11VLO130LRDH1/10R-NZD12K07

• Manufacturer: Bosch Rexroth

• Series: A11VLO Series 1x

• Pump Type: Swashplate axial piston variable pump (open circuit)

• Max Displacement (Vg max): 130 cm³/rev

• Min Displacement (Vg min): 0 cm³/rev

• Rated Pressure: 350 bar

• Peak Pressure: 400 bar

• Maximum Speed (at Vg max): 2,500 rpm

• Maximum Flow Rate: 325 L/min

• Maximum Power Output: 166 kW

• Control Type: LRDH1 (Load-Sensing + Pressure Cutoff + Torque Limiter)

• Pressure Regulation Accuracy: ±1%

• Response Time: <50 ms

• Direction of Rotation: Clockwise (viewed from shaft end)

• Shaft End: Keyed / Splined shaft (configuration dependent)

• Mounting Flange: SAE two-bolt flange

• Built-in Charge Pump: Equipped (impeller type)

• Through Drive: 100% through-drive capable

• Seals: NBR / FKM

• Weight: Approx. 66–72 kg

• Reference Material Number: R902037545 / R902134429

Key Technical Advantages

1. LRDH1 Triple-Function Compound Control for Precision and Efficiency

The A11VLO130LRDH1 features LRDH1 compound control, integrating load-sensing, pressure cutoff, and torque limiter in a single control unit. Load-sensing automatically adjusts flow to match system demand, eliminating energy waste. Pressure cutoff limits maximum system pressure to protect actuators. The torque limiter prevents engine overload—particularly critical in mobile applications. Together, these functions deliver ±1% pressure regulation accuracy with response times under 50 ms.

2. Built-in Impeller-Type Charge Pump for High-Speed Performance

The A11VLO130 is equipped with a built-in impeller-type charge pump, ensuring adequate inlet charging at high speeds and preventing cavitation. This design enables a maximum speed of 2,500 rpm with charge pump—significantly outperforming the non-charge-pump version (2,100 rpm).

3. 350 bar Rated Pressure for Heavy-Duty Applications

With rated pressure of 350 bar and peak pressure of 400 bar, the A11VLO130LRDH1 handles demanding applications such as excavator travel drives and harvester propulsion. Delivering up to 166 kW of power at 350 bar， it provides ample hydraulic power for large mobile machinery.

4. 100% Through-Drive Capability for Simplified System Architecture

The pump rear end supports 100% through-drive, allowing direct series mounting of gear pumps or axial piston pumps up to the same nominal size. This eliminates the need for additional power dividers, significantly reducing installation space and system complexity.

5. Low-Noise Nine-Piston Design with Pulsation Damping

The nine-piston design combined with optimized porting and pulsation damping technology effectively reduces pressure pulsation and operating noise. Noise levels below 75 dB(A) place this pump among the quietest in its class.

6. High-Strength Materials and Precision Manufacturing

The pump features a high-strength cast-iron housing with precision-ground and hardened friction pairs (cylinder block/valve plate, slippers/swashplate). High-efficiency seals are rated for 10,000+ hours in ISO VG 46-68 fluids. MTBF exceeds 30,000 hours.

Application Areas

The A11VLO130LRDH1/10R-NZD12K07 is widely deployed across the following mobile and industrial equipment sectors:

• Construction Equipment: Excavators, wheel loaders, mobile cranes—implement and travel drive hydraulics

• Concrete Machinery: SCHWING truck-mounted concrete pumps—pumping system drive

• Agricultural Machinery: Large combine harvesters—travel drive and header drive

• Mining & Forestry: Drilling rigs, log skidders, crushers—stable high-pressure power in harsh environments

• Road Construction: Rollers, asphalt pavers

• Industrial Hydraulic Systems: Power units—medium-pressure hydraulic power for various industrial equipment

Expert Maintenance Tips

1. Housing Priming Before First Start

Before starting a newly installed or overhauled A11VLO130LRDH1, fill the pump housing with clean hydraulic fluid through the case drain port until fluid overflows from the highest point. Never start the pump with an empty housing—this will cause instantaneous dry-running damage to critical friction pairs. The built-in charge pump cannot establish sufficient suction pressure immediately at startup, making housing priming essential.

2. Fluid Cleanliness Control

A11VLO series pumps require fluid cleanliness to ISO 4406 18/15 or better. Use high-precision return filters (β10≥75). Contamination is the leading cause of wear on the valve plate and cylinder block face.

3. LRDH1 Control Valve Commissioning

LRDH1 compound control valve commissioning requires sequential adjustment of load-sensing, pressure cutoff, and torque limiter settings. Use Rexroth special test equipment per RE 92500-01-B/04.13 operating instructions. Pressure cutoff should be set at 105–110% of maximum system working pressure; torque limiter setting should match the engine’s maximum output torque.

4. Drain Line Arrangement

The drain line must return directly to the tank with back pressure within specified limits. Keep drain lines as short and straight as possible with minimal bends. The drain port should be oriented upward to maintain oil fill in the housing.

5. Shaft Alignment Precision

Maintain shaft concentricity within 0.05 mm. Use standard flexible couplings to compensate for minor misalignment and prevent premature bearing failure.

6. Regular Inspection and Maintenance

Regularly inspect pump shaft seals and the sealing condition of all connecting lines. Follow the Rexroth A11VO/A11VLO Repair Manual (RDE 92500-21) for scheduled maintenance and servicing. Replace hydraulic fluid and filters every 2,000–3,000 operating hours.