John Deere AT364474 Hydraulic Piston Pump | Rexroth A10VO71 Replacement | High Pressure Axial Pump

The AT364474 high-pressure variable axial piston pump by Chengyuan Hydraulic is a precision-engineered power core developed specifically for John Deere heavy machinery. Fully benchmarking the Rexroth A10VO71DFR1 technical standard, this pump is designed to provide accurate hydraulic power for backhoe loaders such as the 310J and 410J. As Chengyuan’s premier replacement solution, the AT364474 emphasizes 100% original-place interchangeability, allowing for rapid installation without any piping modifications. Every pump undergoes 100% simulated condition testing—undergoing extreme pressure and shock load cycles to ensure zero leakage and output stability—making it the ideal choice for those seeking high cost-performance without sacrificing OEM reliability.

Technical Specifications :

• Part Number: AT364474 (John Deere Specs)

• OEM Series: Rexroth A10VO71 / 31 Series

• Displacement: 71 cc/rev

• Nominal Pressure: 280 bar (28 MPa)

• Peak Pressure: 350 bar (35 MPa)

• Max Speed: 2550 rpm (Self-priming)

• Control Type: DFR1 (Pressure and Flow Control / Load Sensing)

• Direction of Rotation: Right-hand (Clockwise)

• Seal Material: High-performance Viton (FKM), heat and chemical resistant

• Weight: Approx. 33 kg

Key Technical Advantages:

• Bi-Metal Valve Plate Technology: Utilizing a high-strength bimetallic sintered valve plate, the pump exhibits significantly improved anti-seizure and wear resistance under continuous high-pressure conditions, ensuring peak volumetric efficiency.

• Load Sensing (DFR1) Precision Control: The integrated DFR1 control mechanism adjusts the swashplate angle in real-time based on load demand. This “power-on-demand” logic drastically reduces system heat generation and improves overall fuel efficiency.

• Reinforced Cylinder & Slipper Assemblies: The piston slippers are crafted from reinforced alloy and precision-lapped to fit the cylinder bores perfectly. This minimizes internal leakage and extends the service life in harsh environments like quarries and construction sites.

• Low-Noise Housing Design: The pump housing is optimized via fluid dynamics to suppress vibrations caused by pressure pulsations. Even at the rated pressure of 28 MPa, the operating noise remains at a very low level, enhancing the operator’s cabin environment.

Application Areas:

• John Deere Backhoe Loaders: 310J, 310K, 315SJ, 410J, 410K.

• Construction Machinery Control: Ideal for hydraulic systems requiring high-pressure boost or main power drive.

Expert Maintenance Tips:

• Pre-Filling Before Startup: After installation, the pump case must be filled with clean hydraulic oil through the top drain port. NEVER start the pump dry; doing so will cause instantaneous damage to the piston shoes and swashplate.

• System Cleanliness Monitoring: We recommend using oil with a cleanliness level of 18/16/13 according to ISO 4406. Regularly replace 10-micron high-precision filters to prevent particles from scratching the cylinder surface.

• Case Drain Backpressure Check: Ensure the case drain line is unobstructed. The backpressure should not exceed 1.2 bar to prevent shaft seal failure and subsequent leakage.