Parker PGP511 Hydraulic Gear Pump | 3349 Series Replacement | High Pressure Aluminum Pump
| Model Number | 3349122280, 3349122279, 3349121521, 3349116318, 3349116316, 3349122115, 3349219479, 3349121515, 3349112785 |
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Product Description
LIC Hydraulic’s Parker PGP511 (3349 Series) high-pressure gear pumps are engineered as premier 100% interchangeable replacements for original Parker Hannifin PGP units. Designed for durability and peak efficiency, these aluminum-bodied pumps are the ideal solution for demanding mobile and industrial hydraulic systems. We prioritize reliability through 100% simulated load testing, ensuring every 3349 series pump delivers OEM-matching performance, flow stability, and seamless mechanical fit.
Technical Specifications (PGP511/3349 Core Range)
Model Series: Parker PGP511 / 3349
Displacement Range: 6.0 cm³/rev to 33.0 cm³/rev
Nominal Pressure: Up to 250 bar (3625 PSI)
Intermittent Pressure: Up to 280 bar (4060 PSI)
Max Speed: Up to 3500 rpm
Shaft Options: Splined, Keyed, or Tapered shafts (SAE/European standards)
Mounting: SAE 2-bolt, 4-bolt, or standard European flanges
Construction: High-tensile extruded aluminum body with cast iron covers
Seals: High-performance NBR or Viton options
Key Technical Advantages
Pressure-Balanced Design: Features floating bush technology that automatically adjusts axial clearances. This maintains superior volumetric efficiency even during continuous high-pressure operations.
Fatigue-Resistant Body: The extruded aluminum alloy housing provides higher strength-to-weight ratios and superior resistance to hydraulic pulsations compared to conventional sand-cast pumps.
Advanced Gear Profiling: Precision-ground 12-tooth gears reduce flow ripples and mechanical vibration, ensuring quiet operation and stable hydraulic power output.
Heavy-Duty Bushings: Equipped with high-performance DU composite bearings, designed to handle high radial loads and provide exceptional resistance to seizure.
Application Areas
Mobile Hydraulics: Forklifts, agricultural tractors, and mini-excavator auxiliary circuits.
Municipal Vehicles: Refuse compactors, street sweepers, and snow removal equipment.
Industrial HPUs: Power units for machine tools, lifting platforms, and conveyor systems.
Expert Maintenance Tips
Initial Priming: Always fill the pump with clean hydraulic fluid before the first start-up to prevent catastrophic dry-run damage.
Fluid Cleanliness: Maintain system oil at ISO 4406 18/16/13 standards. Contamination is the primary cause of internal wear on gear faces.
Inlet Conditions: Check suction lines regularly to ensure no air ingress. A vacuum exceeding 0.2 bar can lead to cavitation and premature pump failure.


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