Rexroth A10VSO45 A10VSO71 Piston Pump | A10VEC 80 A10VNO85 | Variable Displacement

Chengyuan Hydraulic presents the A10V Series Axial Piston Variable Pumps, expertly engineered as high-end replacements for Rexroth industrial and mobile standards. This range encompasses the classic A10VSO45/71 (Series 31/52), the high-performance A10VEC 80, and the modernized A10VNO85 specifications. Our units, including specific configurations like A10VEC 80 HZ6/52W2 (R902409028) and A10VNO85DRF/53L, offer 100% Drop-in Interchangeability in terms of mounting geometry, control logic, and dynamic response. Every pump undergoes Chengyuan’s rigorous 100% Simulation Load Testing, verifying operational integrity at 280 Bar to ensure seamless integration into sophisticated Load Sensing (LS) systems.

Technical Specifications 

• Compatible Brand: Rexroth A10V Series

• Core Model Designations: A10VSO45, A10VSO71, A10VEC 80, A10VNO85

• Displacement Range: 45cc/rev, 71cc/rev, 80cc/rev, 85cc/rev

• Nominal Pressure: 280 Bar (28 MPa)

• Peak Pressure: 350 Bar (35 MPa)

• Maximum Speed: 2100 – 2600 r/min (model dependent)

• Control Types: DR (Pressure Control), DRF (Load Sensing), E (Electronic Proportional)

• Housing Material: High-strength Ductile Iron (Stress-relieved)

• Sealing: FKM (Viton) as standard for high thermal stability

Key Technical Advantages:

• Optimized Swashplate Geometry: The precision-cast swashplate minimizes lateral forces on the pistons during reciprocation. This enhances mechanical efficiency and achieves a response time of 40-60ms, meeting the dynamic requirements of high-precision machinery.

• Low-Noise Valve Plate Technology: The valve plate features specialized relief grooves that suppress flow pulsation and pressure oscillations. Chengyuan’s A10V series operates 3-5 dB(A) quieter than typical aftermarket alternatives under full load.

• High Power-to-Weight Ratio: Through advanced structural simulation, models like the A10VNO85 optimize wall thickness without compromising strength, providing high power density ideal for mobile applications with limited installation space.

• Superior Self-Priming Capability: The flow-optimized suction port ensures high filling efficiency even during cold starts or high-speed operations, effectively preventing cavitation and premature wear on the rotating group.

Application Areas:

• Industrial Manufacturing: Injection molding machines, die-casting presses, and metal forming tools.

• Mobile Machinery: Excavator auxiliary circuits, concrete pumps, and heavy-duty cranes.

• Metallurgical Equipment: High-pressure hydraulic power units in steel mills and forging plants.

Expert Maintenance Tips:

• Case Drain Pressure Control: Ensure that the pump case pressure does not exceed 0.5 Bar. Excessive backpressure in the case drain will destroy the shaft seal and cause the piston slippers to detach.

• Pre-Start Priming Protocol: Before initial operation, the pump housing MUST be filled with hydraulic oil via the highest drain port. Running the pump dry will cause catastrophic galling between the valve plate and cylinder block within seconds.

• Fluid Cleanliness Standard: We recommend using ISO VG 46/68 oil with a cleanliness level of at least NAS Grade 8 to maximize the lifespan of the precision-honed piston-slipper assemblies.