AT522445 Hydraulic Piston Pump Danfoss 45 Series 260Bar

Product Overview

The AT522445 is a heavy-duty axial variable displacement piston pump engineered on the proven Danfoss Series 45 architecture. Built specifically for high-demand hydraulic systems in John Deere agricultural and construction machinery, this pump delivers 100% direct drop-in interchangeability. Every unit undergoes 100% full-load factory testing to simulate severe working conditions, ensuring extreme pressure stability and long-term operating efficiency.

Technical Specifications

• Model Code: AT522445 (Cross Reference: 11274308, AT534169, AT432422, 83024764, 70004303S, AN279297, 11174963, AT465604)

• Pump Type: Swashplate Axial Variable Piston Pump (Danfoss Series 45 Frame)

• Displacement: 45 cc/rev

• Rated Continuous Pressure: 260 bar (3770 psi)

• Peak Operating Pressure: 400 bar (5800 psi)

• Maximum Speed: 3600 rpm

• Control Logic: Load Sensing (LS) & Pressure Compensated (PC)

• Rotation Direction: Clockwise (CW) / Counter-Clockwise (CCW)

• Unit Weight: Approx. 22.5 kg

Key Technical Advantages

• Precision Metallurgy & Tribology: Cylinder block and piston shoes are manufactured with nitrided copper alloys and ultra-precision grinding to optimize anti-wear characteristics and minimize internal leakage under high pressures.

• Hydrodynamic Balance Design: Engineered with optimized valve plate geometry to balance axial and radial loads, drastically reducing fluid pulsation and operational noise levels.

• 100% Direct Drop-in Fit: Designed strictly to original Danfoss and John Deere mounting specifications, ensuring hassle-free installation without plumbing modifications.

• High Volumetric Efficiency: CFD-optimized internal passages guarantee volumetric efficiency exceeding 93% at 260 bar rated pressure, preventing heat buildup and saving fuel.

Application Areas

• John Deere Agricultural Machinery: Primary hydraulic and steering pumps for John Deere self-propelled sprayers, combine harvesters, and high-horsepower tractors.

• Mobile & Industrial Hydraulics: Direct replacements for loaders, backhoes, and mobile hydraulic platforms operating on the Danfoss 45 Series framework.

Expert Maintenance Tips

Flush the hydraulic circuit thoroughly and replace return filters before mounting the pump. Use ISO VG 46/68 anti-wear hydraulic oil, maintaining oil cleanliness to ISO 18/16/13 (NAS Class 8) or cleaner. Always pre-fill the pump housing through the case drain port with clean oil before initial startup to prevent dry friction and premature bearing damage.