John Deere AT522444 Original Hydraulic Piston Pump

Original John Deere AT522444 Hydraulic Piston Pump

The John Deere AT522444 Original Hydraulic Piston Pump is engineered to deliver unmatched fluid power efficiency for heavy-duty earthmoving applications. Utilizing the world-renowned Danfoss Series 45 variable displacement platform, this 90 cc/rev pump transforms mechanical engine torque into highly responsive hydraulic energy with minimal power loss. By matching output precisely to system load demands, it significantly prevents unnecessary heat generation, safeguards sensitive control valves, and optimizes your machine's overall fuel economy under heavy civil construction workflows.

Rugged Cast Iron Infrastructure & Extended Wear Life

Built to survive the harshest job site environments, the AT522444 features an advanced, single-piece rigid cast iron housing. This robust design dramatically reduces potential fluid leak paths while serving as a heavy-duty acoustic shield that lowers cabin noise during high-pressure operations. Equipped with premium internal rotating groups and reinforced tapered roller input shaft bearings, this genuine OEM pump delivers high tolerance against severe structural shock loads and fine particle contamination, ensuring an exceptionally long service life.

Direct OEM Fitment & Zero-Hassle Installation

Eliminate costly field alignment errors and extensive machinery downtime. As a genuine John Deere factory component, the AT522444 offers 100% plug-and-play compatibility with your motor grader’s original hydraulic plumbing, mounting brackets, and control harnesses. Its precision-machined port configurations and exact spline specifications guarantee a clean, leak-free connection, restoring your equipment to its original factory performance standards immediately upon installation.

Bulleted Selling Points / High-Density Features 

For quick scanning on product tabs or Amazon/Alibaba listings, use these punchy bullet points:

• Genuine John Deere OEM Quality: 100% original factory component ensures seamless operational integration and prevents premature pressure drops.

• Advanced Danfoss Series 45 Technology: Proven open-circuit variable axial piston design provides smooth, highly proportional hydraulic flow control.

• High Volumetric 90 cc/rev Displacement: Delivers optimal fluid volume and rapid cylinder response times for precise machine blade and steering control.

• 310 Bar Continuous Pressure Rating: Heavy-duty architecture engineered to handle constant high-pressure cycles up to 4,495 PSI without sacrificing efficiency.

• Single-Piece Rigid Frame: High-strength cast iron housing absorbs structural vibrations, eliminates leak points, and minimizes operator cab noise.

• Load-Sensing Energy Savings: Automatically adjusts flow based on real-time working resistance, drastically reducing engine fuel consumption.

• Perfect Application Match: Custom-configured explicitly for John Deere G-Series Motor Graders powered by the 6.8L engine platform.

• Technical Specifications

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

  • Maximum Pressure Rating: Up to 310 bar / 4,495 psi continuous

  • Maximum Rated Speed: 3,600 rpm

  • Product Dimensions: Approx. 15.8 in x 13.8 in x 11.5 in (401 mm x 350 mm x 292 mm)

  • Net Weight: Approx. 81.0 lbs / 36.7 kg

• Unit Length: 15.6 inches

• Unit Width: 13.5 inches

• Unit Height: 12.5 inches 

 Compatible Equipment Models

This main hydraulic pump delivers direct-fit, bolt-on OEM configuration for the following John Deere Motor Graders: 

620G 622G 670G 672G 770G 772G 870G 872G