John Deere Hydraulic Piston Pump | AT186167 AT197383 AT172603 | High Pressure Oil Pump

The AT Series Hydraulic Piston Pumps from LIC Hydraulic are high-performance solutions specifically engineered for John Deere construction and agricultural equipment. These pumps, including key part numbers like AT186167 and AT197383, are the primary power source for the hydraulic systems in backhoe loaders and graders. Utilizing Axial Piston technology, these units offer superior efficiency and durability compared to standard gear pumps. We provide 100% drop-in replacements, matching original John Deere specifications for splines, mounting flanges, and porting locations.

Technical Highlights

• Part Numbers: AT180926, AT186167, AT197383, AT172064, AT172603.

• Design: Load Sensing Axial Piston Variable Displacement Pump.

• Operating Pressure: Rated for heavy-duty construction cycles (up to $4000\text{ psi}$ range).

• Material: High-tensile cast iron housing with hardened rotating groups.

Core Advantages

• Fuel Efficiency through Control: The integrated load-sensing compensator adjusts flow instantly based on operator input, reducing engine drag during idle and improving overall vehicle fuel economy.

• Heavy-Duty Rotating Group: Hardened pistons and lapped valve plates provide a tight seal, ensuring high volumetric efficiency and consistent power delivery even in extreme temperatures.

• OEM-Grade Compatibility: Engineered as direct replacements for Parker/John Deere factory-installed units, eliminating the need for hose or bracket modifications during installation.

• Extreme Durability: Specifically designed to handle the rapid pressure spikes common in backhoe digging operations, significantly outlasting generic aftermarket alternatives.

Expert Maintenance Tips

• Case Drain Management: Ensure the case drain line is connected and unobstructed. High case pressure is the #1 cause of shaft seal failure and internal bearing damage in AT series pumps.

• Filter Replacement: John Deere systems require high-cleanliness hydraulic fluid (ISO 18/16/13). Always replace the hydraulic return and suction filters when installing a new pump to prevent immediate contamination.

• Suction Line Check: Before startup, verify that the suction hose is in good condition and not collapsing. Cavitation caused by suction restriction will destroy a new piston pump in minutes.