JCB 3CX 4CX Hydraulic Pump PGP620 | 7029531021 7029531024 7029531025

LIC Hydraulic offers the PGP620 Series High-Pressure Gear Pumps, the standard power units for JCB 3CX, 4CX, 3DX, and 4DX backhoe loaders. These pumps serve as the hydraulic “heart,” powering the loader bucket, the excavator arm, and stabilizers. Engineered using the robust Parker PGP620 design platform, these pumps feature specialized pressure-loaded plates and high-tensile gears capable of handling continuous pressures up to $275\text{ bar}$. For part numbers 7029531021 and 7029531024, our units offer a direct OEM-spec fit, ensuring your JCB equipment maintains its legendary digging force and cycle times.

Technical Specifications (Quick Reference)

• Series: PGP620 / PGP Series.

• OEM Part Nos: 7029531021, 7029531024, 7029531025, 7029531026.

• Max Pressure: $275\text{ bar}$ ($4000\text{ PSI}$).

• Mounting: JCB standard 2-bolt or 4-bolt patterns with specified splined shafts.

• Material: High-strength aluminum alloy or cast iron housing (model dependent).

Key Technical Advantages

• Axial Clearance Compensation: Floating bushings automatically adjust to pressure, minimizing internal fluid bypass and maximizing lifting power.

• Heavy-Duty DU Bearings: Designed to withstand the high radial loads from gear drive and the intense vibrations inherent in backhoe operation.

• Global Interchangeability: Built to precise SAE and ISO standards, ensuring seamless replacement for original JCB components without modification.

• High Volumetric Efficiency: Maintains peak performance even as hydraulic oil temperatures rise during long shifts in hot environments.

Application Areas

• Backhoe Operations: Main hydraulic flow for the boom, dipper, and bucket cylinders.

• Front Loader Functions: Rapid power for lift and tilt on the front loader arm.

• Auxiliary Circuits: Powering hammers, stabilizers, and steering systems.

Expert Maintenance Tips

• Startup Lubrication: Before first start, pour clean hydraulic oil into the inlet port and rotate the shaft by hand to ensure the internal plates and gears are pre-lubricated.

• Monitor Inlet Vacuum: Ensure the suction hose is in perfect condition. Air leaks or restricted suction (cavitation) will cause immediate “scoring” on the internal aluminum housing.

• Cleanliness Standard: Maintain oil cleanliness to ISO 4406 19/17/14. JCB machines are high-production units; any hard contamination will degrade the pump’s efficiency within hours.

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