John Deere AT354782 AT371429 Hydraulic Pump | 75cc Axial Piston Pump for 648H 748H 848H Skidders
| Model Number | AT371429, AT354782 |
|---|
Product Description
LIC Hydraulic’s AT354782 and AT371429 axial piston variable displacement pumps are engineered specifically for the demanding John Deere H and HT series forestry skidders. Featuring a robust 75 cc displacement, these pumps are the lifeblood of log-handling hydraulics, providing consistent power under high-vibration and heavy-duty cycles. Our units offer 100% seamless interchangeability with original OEM equipment. Every pump undergoes 100% full simulated load testing to guarantee that volumetric efficiency and response times meet or exceed original factory specifications for forestry service.
Technical Specifications
Part Numbers: John Deere AT354782, AT371429
Displacement: 75 cm³/rev (75 cc)
Rated Pressure: 280 bar (4060 psi)
Peak Pressure: 350 bar (5075 psi)
Control Type: Load Sensing (LS) with Pressure Limiter (DR)
Max Operating Speed: 2500 rpm
Housing Material: High-tensile Ductile Iron
Piston Construction: Hardened Carburized Steel
Net Weight: Approx. 48.0 kg
Key Technical Advantages
Forestry-Grade Durability: Internal rotating groups are enhanced with specialized heat treatments to resist adhesive wear, ensuring reliability despite the rapid load fluctuations common in logging operations.
Precision Load Sensing: The integrated compensator valve provides surgical flow matching. By delivering only the required flow to the grapple or arch, it minimizes heat buildup and optimizes skidder fuel efficiency.
High Power Density: The 75cc frame is optimized for a compact footprint, allowing for easier maintenance access within the crowded engine compartments of the 648H-848HT machines.
Fluid Pulsation Damping: Advanced valve plate timing grooves suppress fluid ripples, reducing harmonic vibration throughout the chassis and protecting downstream hydraulic components from fatigue.
Application Areas
John Deere Skidders: Primary hydraulic supply for models 648H, 648HT, 748H, 748HT, 848H, and 848HT.
Log Handling Equipment: Suitable for any specialized forestry chassis requiring a high-pressure 75cc variable displacement source.
Expert Maintenance Tips
Mandatory Pre-Filling: Never dry-start. Fill the pump case with filtered hydraulic oil through the highest drain port before initial operation to protect the piston shoes and swashplate.
Drain Pressure Management: Ensure the case drain backpressure remains below 2 bar. In forestry work, damaged return lines can cause backpressure spikes that blow out shaft seals instantly.
Environmental Contamination: Maintain system cleanliness at ISO 18/16/13. In dusty logging environments, the air breather on the hydraulic reservoir is as critical as the oil filter itself—replace it regularly.
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