AT227997 John Deere Hydraulic Pump Interchange

Product Overview

The AT227997 is a high-performance high-pressure hydraulic pump engineered specifically for John Deere heavy-duty machinery, serving as a direct, drop-in replacement compatible with cross-reference models such as AT428960, AT180926, AT223264, and AT139444. Featuring exceptional interchangeability and subjected to 100% simulated working condition testing before dispatch, this pump ensures robust, reliable hydraulic power under the most demanding field environments.

Technical Specifications

• Primary Model Code: AT227997 (Cross-reference: AT428960, AT180926, AT223264, AT139444)

• Brand Compatibility: John Deere / Sauer-Danfoss platform architecture

• Pump Type: High-pressure axial variable piston pump

• Rated Working Pressure: 280 bar (4000 psi)

• Peak Pressure Limit: 350 bar (5100 psi)

• Displacement: 55 cc/rev

• Maximum Drive Speed: 3000 rpm

• Seal Material: High-grade FKM (Viton) for thermal and chemical resistance

• Mounting Interface: SAE standard multi-bolt flange

• Approximate Weight: 28 kg

Key Technical Advantages

• Precision Metallurgy & Nitriding: Cylinder blocks and piston shoes undergo specialized nitriding and micro-grinding to maximize anti-wear characteristics under severe pressures.

• Fluid Dynamic Valve Plate Optimization: Advanced CFD porting design minimizes fluid turbulence and pressure pulsation, significantly reducing operational noise.

• 100% Drop-in Interchangeability: Manufactured strictly to original John Deere dimensional tolerances, allowing instant replacement without plumbing or mounting modifications.

• 100% Simulated Factory Testing: Every individual unit undergoes rigorous testing under full load and simulated temperature conditions to guarantee zero external leakage and high volumetric efficiency.

Application Areas

• John Deere Backhoe Loaders: Primary hydraulic systems for 310, 410, and related backhoe loader series.

• Agricultural Machinery: High-horsepower tractors, self-propelled applicators, and industrial hydrostatic drive applications.

Expert Maintenance Tips

Thoroughly flush the hydraulic circuit and replace return filters prior to installation. Use ISO VG 46 or 68 anti-wear hydraulic oil, maintaining oil cleanliness within ISO 18/16/13 standards. Always pre-fill the pump housing with clean hydraulic oil through the case drain port before initial start-up to avoid dry friction and premature bearing wear.