Parker PGP640 Triple Gear Pump | 7049532002 | PGP640 & PGP620 Combination

The Parker PGP640/PGP620 Triple Gear Pump from LIC Hydraulic is a premium power solution for heavy-duty multi-circuit hydraulic systems. Part number 7049532002 combines the high-flow PGP640 section with two PGP620 sections, allowing a single drive source to power three independent functions. Constructed with high-strength ductile iron housings, this pump is engineered for extreme durability under high-pressure pulses. We guarantee 100% mechanical interchangeability with original Parker Commercial units. Every assembly is 100% load-tested for volumetric efficiency and synchronization across all three stages.

Technical Configuration Details

The triple unit consists of:

1. Front Section (PGP640B): $65\text{ cc/rev}$ — Primary power source.

2. Middle Section (PGP620B): $37\text{ cc/rev}$ — Auxiliary circuit support.

3. Rear Section (PGP620A): $23\text{ cc/rev}$ — Steering or pilot control.

• Max Continuous Pressure: Up to $310\text{ bar}$ ($4500\text{ psi}$).

• Max Speed: $3000\text{ RPM}$.

• Shaft Type: Heavy-duty spline (T6/E6 specifications).

• Sealing: High-grade Viton for superior thermal and chemical resistance.

Key Technical Advantages

• Ductile Iron Reliability: The two-piece high-strength iron construction provides a much higher fatigue limit than aluminum pumps, making it the preferred choice for applications with frequent pressure spikes.

• Advanced Interlocking Gears: Precision-ground gear sets combined with pressure-balanced thrust plates minimize internal flow ripple, resulting in quieter operation and reduced hydraulic fatigue on the entire system.

• Superior Volumetric Efficiency: Axial clearance compensation technology ensures that the pump maintains over $95\%$ efficiency even at its peak $310\text{ bar}$ rating, optimizing fuel consumption and cycle times.

• Integrated Multi-Circuit Power: Consolidation of three pumps into one unit saves valuable space, eliminates the need for complex PTO splitters, and reduces the weight of the hydraulic power unit.

Application Areas

• Heavy Construction: Excavators (Triple pump merging systems), loaders, and graders.

• Mining & Quarrying: Underground mining vehicles and mobile crushing plants.

• Forestry: Harvesters and processors requiring multi-function simultaneous control.

• Material Handling: Reach stackers and heavy-duty industrial lift trucks.

Expert Maintenance Tips

• Inlet Suction Sizing: Ensure the suction manifold is correctly sized for the combined flow of all three sections. Suction vacuum exceeding $5\text{ in.Hg}$ will cause cavitation, leading to rapid wear of the primary section.

• System Cleanliness: Given the high pressure and precision of the PGP620 sections, maintain oil cleanliness at ISO 4406 18/16/13 or better. High-pressure filtration is recommended for each discharge port.

• Thermal Management: Multi-stage pumps generate significant heat at high duty cycles. Monitor case temperatures and ensure your cooling system is sized for the total combined output power of the triple unit.