PGP640 Parker 600 Series Gear Pump Cast Iron High Pressure

Product Overview

The PGP640 (including codes such as PGP640B0700CE4A4NT5T3S-511A014 and 7049521107) and related models PGP620, PGM620 and PGM640 belong to the Parker Hannifin 600 Series heavy-duty cast iron external gear pumps and motors. Featuring a two-piece interlocking cast iron construction, pressure-balanced thrust plates and journal bushings, these units deliver high volumetric efficiency, high power density and long service life. Continuous pressures reach up to 275 bar with speeds up to 3000 rpm. Available in single or multiple sections, they offer direct bolt-on interchangeability with OEM units and undergo 100% simulated duty testing for demanding mobile hydraulic applications.

Technical Specifications 

• Models: PGP640 / PGP620 / PGM640 / PGM620 (600 Series)
• Type: Fixed displacement external gear pump/motor (Heavy-Duty Cast Iron)
• Displacement range (PGP/PGM640): 30–80 cm³/rev (1.83–4.88 in³/rev)
• Displacement range (PGP/PGM620): 19–50 cm³/rev
• Displacement range (PGP/PGM610): 7–32 cm³/rev
• Continuous operating pressure: Up to 275 bar (4000 psi; slightly lower for larger displacements)
• Maximum speed: Up to 3000 rpm
• Minimum speed: Approx. 500 rpm
• Body material: Cast iron
• Design features: Pressure-balanced thrust plates, journal bushings, two-piece interlocking construction
• Configuration: Single or multiple sections; integral valve options (relief, priority, unloading, etc.)
• Rotation: Clockwise, counterclockwise or bi-rotational
• Mounting: SAE 2-bolt / 4-bolt flanges
• Other: Compatible with standard hydraulic fluids, water-glycol, phosphate esters; recommended filtration per ISO 4406

Key Technical Advantages

1. True drop-in interchangeability: Manufactured to OEM dimensional, flange and porting standards for bolt-on replacement without modifications.
2. High volumetric efficiency and power density: Pressure-balanced thrust plates and precision machining minimize internal leakage for stable, efficient output.
3. Heavy-duty cast iron construction: Two-piece interlocking design provides impact resistance and long service life in severe mobile applications.
4. Flexible multi-section and valve integration: Supports multiple sections and integral relief/priority valves to simplify system plumbing.
5. 100% simulated duty testing: Full pressure, flow, noise and endurance verification before shipment ensures ready-to-install reliability.

Application Areas

• Construction machinery fan drive, steering and brake systems
• Material handling and forklift hydraulics
• Mowers, winches and agricultural equipment
• Military and heavy-duty mobile equipment
• Open-circuit systems requiring high-pressure cast iron gear pumps/motors

Expert Maintenance Tips

• Confirm rotation direction, flange and shaft compatibility before installation; use recommended hydraulic fluid and maintain cleanliness (ISO 19/17/14 or better recommended).
• Start at low speed unloaded; check for leaks and noise. Observe shaft load limits on multi-section units.
• Regularly inspect seals and bearings; ensure unrestricted suction lines to prevent cavitation.
• Keep oil temperature within –20 to +80 °C; avoid over-pressure operation.
• For special codes or integral valve configurations, verify the complete order code and consult technical support.