A11VO75DRS Rexroth Variable Piston Pump 350Bar

Product Overview

Engineered to meet the high-pressure, heavy-duty demands of mobile hydraulics and construction machinery, our A11VO axial piston variable displacement pump delivers unparalleled performance. Utilizing a swashplate design for open-circuit operations, this specific model (A11VO75DRS/10L-NZD12N00) serves as a flawless, 100% drop-in replacement for the original Bosch Rexroth equivalent. As a dedicated global manufacturer of high-pressure hydraulic components, we enforce rigorous quality control protocols. Every single pump is subjected to 100% simulated working condition testing at full load before shipment. This guarantees that its flow delivery, volumetric efficiency, and control responsiveness consistently meet or exceed OEM standards at a continuous 350 bar, providing your machinery with smooth, efficient, and energy-saving hydraulic power.

Technical Specifications

• Complete Model Code: A11VO75DRS/10L-NZD12N00

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

• Max Displacement: 75 cc/rev (Infinitely variable)

• Nominal Operating Pressure: 350 bar (5100 psi)

• Peak Operating Pressure: 400 bar (5800 psi)

• Maximum Speed (Self-priming): 2600 rpm

• Control Method: DRS (Load Sensing with Pressure Cut-off)

• Rotation: Left-hand (Counter-clockwise, viewed from drive shaft)

• Weight: Approx. 48 kg

Key Technical Advantages

• 100% Drop-in Interchangeability: Manufactured with precise reverse-engineering. The mounting flange, NZD splined drive shaft, and all porting dimensions identically match the original Rexroth specifications, ensuring a swift, modification-free installation for field technicians.

• Advanced DRS Load Sensing Control: Integrated with a highly responsive DRS control valve. This system automatically adjusts flow and pressure based on actual load requirements, drastically reducing engine fuel consumption and system heat generation during idle or partial-load phases to achieve optimal power matching.

• High-Pressure Fatigue-Resistant Materials: The bimetal cylinder block, paired with specially nitrided pistons and wear-resistant brass slippers, ensures exceptional durability. The internal rotary group easily withstands the rigorous demands of continuous 350-bar operation and sudden 400-bar pressure spikes.

• 100% Simulated Working Condition Testing: Zero tolerance for batch sampling. Every assembled A11VO75 unit undergoes stringent full-load flow testing, pressure cut-off response calibration, and thermal equilibrium validation on our automated test rigs to ensure immediate readiness for extreme applications.

Application Areas

Widely deployed in the open-center hydraulic drives of heavy-duty mobile machinery. Perfectly suited as the primary hydraulic power source for excavators, concrete pump truck boom controls, rotary drilling rigs, crawler cranes, and heavy mining equipment.

Expert Maintenance Tips

• Pre-filling the Housing Before Commissioning: Prior to initial startup, the pump housing must be completely filled with clean hydraulic fluid through the highest case drain port to expel all trapped air. Dry running will instantly destroy the pistons and slipper pads.

• Strict Case Drain Pressure Limits: The case drain line must be routed directly to the reservoir (below fluid level) without any restrictions. Ensure that the internal housing pressure never exceeds 2 bar (absolute) even during cold starts or maximum rotational speeds.

• Fluid Cleanliness Standards: Variable piston pumps are highly sensitive to fluid contamination. We highly recommend using premium anti-wear hydraulic fluid and maintaining a system cleanliness level of at least ISO 4406 20/18/15. Regularly monitor return filter differential pressure indicators.