AT353936 Main Hydraulic Pump for John Deere 648G III Skidder

Product Overview

The AT353936 main hydraulic pump (interchangeable with OEM parts AT180656 and AT195248) is precision-engineered for heavy-duty John Deere forestry equipment. Built to rigid OEM technical specifications, this high-performance pump guarantees 100% drop-in replacement for John Deere 460D, 460DC, 560D, 640G-II, 640G-III, 648G-II, and 648G-III grapple skidders. Manufactured to withstand extreme shock loads and harsh environmental conditions, every unit undergoes rigorous 100% simulated full-load factory testing to deliver uncompromised volumetric efficiency, durability, and hydraulic responsiveness.

Technical Specifications

• Part Number: AT353936 (Cross-Reference: AT180656, AT195248)

• Compatible Equipment: John Deere 460D, 460DC, 560D, 640G-II, 640G-III, 648G-II, 648G-III

• Pump Type: Axial Piston Variable Displacement Main Pump

• Nominal Displacement: Approx. 75 cm³/rev

• Rated Operating Pressure: 28.0 MPa (280 bar / 4060 psi)

• Peak Operating Pressure: 31.5 MPa (315 bar / 4568 psi)

• Maximum Speed: 2400 rpm

• Control Type: Load Sensing with Pressure Cut-Off

• Rotation Direction: Clockwise (CW, viewed from shaft end)

• Net Weight: Approx. 42 kg

Key Technical Advantages

• 100% Direct Interchangeability: Factory-matching mounting flanges, shaft splines, and port dimensions ensure seamless installation without system modification, drastically reducing downtime.

• Premium Tribological Components: High-grade alloy steel cylinder blocks and specialized bimetallic valve plates are precision-lapped to eliminate galling and ensure maximum volumetric efficiency under high pressure.

• Heavy-Duty Bearing System: Fitted with high-capacity roller bearings designed to absorb heavy radial and axial shock loads inherent in demanding forestry operations.

• Low Noise & Rapid Response: Advanced timing groove design optimizes fluid distribution, reducing pressure ripple and operational noise while enhancing load-sensing responsiveness.

Application Areas

• Forestry & Logging Equipment: John Deere wheeled grapple skidders and cable skidders.

• Heavy Mobile Machinery: Main hydraulic power supply for forestry loaders and rugged off-highway equipment sharing the same powertrain platform.

Expert Maintenance Tips

• System Flushing: Thoroughly flush the main hydraulic system and clean the oil reservoir prior to installing the new pump to ensure oil cleanliness reaches ISO 4406 18/16/13 or better.

• Case Priming: Fill the pump housing completely with clean hydraulic fluid through the drain port before initial start-up. Never run the pump dry.

• Filter Replacement: Always replace all hydraulic intake and return filters simultaneously when installing a new pump to prevent immediate contamination.