Parker PGP505 PGP530 Hydraulic Gear Pump | 7029120058 7029110058 | Loader & Excavator

LIC Hydraulic proudly presents the Parker PGP500 Series (PGP505/PGP530), a premium line of axial-compensated gear pumps engineered for the brutal duty cycles of mobile machinery. Specifically designed for excavators and loaders, models such as 7029120058 and 7029110058 provide steady, high-pressure performance for steering and pilot systems. Our units offer 100% original interchangeability, ensuring a seamless drop-in fit for OEM replacements. Every assembly is subjected to 100% dynamic load testing to guarantee maximum volumetric efficiency and durability in the field.

Technical Specifications (Bulleted List)

• Product Series: PGP505 (Group 1), PGP530 (Group 3)

• OEM Part Numbers: 7029110058, 7029120005, 7029120058

• Displacement Range:

  • PGP505: 2.0 to 12.0 $cm^3/rev$

  • PGP530: 20.0 to 70.0 $cm^3/rev$

• Rated Operating Pressure: Up to 275 bar (4000 PSI)

• Peak Pressure Capability: Up to 300 bar (4350 PSI)

• Maximum Speed: 3000 to 4000 RPM

• Body Material: High-tensile extruded aluminum alloy

• Internal Bushings: Heavy-duty, self-lubricating DU bearings

Key Technical Advantages

• Pressure-Balanced Efficiency: The floating thrust plate design utilizes internal hydraulic pressure to maintain optimal clearances, resulting in over 95% volumetric efficiency.

• Advanced Two-Piece Design: This structural refinement minimizes potential leak paths and enhances body rigidity for high-pressure applications.

• Quiet Operation: Precision-ground 12-tooth gears reduce flow ripple and mechanical vibration, contributing to a quieter operator environment.

• Robust Cold-Start Capability: Internal lubrication channels are optimized to protect the bushings and gear faces during cold-weather startups.

Application Areas

• Excavators: Primary choice for pilot control pumps, fan drive systems, and auxiliary hydraulic circuits.

• Loaders: Essential for hydraulic steering circuits, transmission control, and hydraulic cooling fans.

• Specialized Machinery: High-pressure power source for municipal sweepers and waste management vehicles.

Expert Maintenance Tips

• Pre-Lubrication Protocol: Prior to initial startup, fill the pump housing with filtered hydraulic oil through the suction port. Manual rotation is recommended to ensure internal friction pairs are protected.

• Contamination Control: Maintain fluid cleanliness at ISO 4406 18/15/12 or better. Clean oil is the single most critical factor for extending the life of aluminum gear pumps.

• Seal Integrity: Always check for “O-ring extrusion” during service intervals. Any air ingress on the suction side can lead to cavitation, which will rapidly scar the internal pump body.