PGP Series Hydraulic Gear Pump | PGP500 PGP511 PGP517 Gear Pump Replacement

Genlu Hydraulic proudly introduces our PGP Series high-performance hydraulic gear pumps, engineered for the most demanding industrial and mobile applications. This series comprehensively covers the PGP500, PGP503, PGP505, PGP511, and PGP517 specifications, ensuring perfect compatibility with complex OEM models such as 3349111732, 3349521031, 3349219593, and 3349111004. Genlu unequivocally guarantees 100% Drop-in Interchangeability in mounting flanges, splined shafts, port configurations, and pressure handling relative to Parker original standards. Backed by our uncompromising 100% Simulation Load Testing, each unit is validated for volumetric efficiency, dynamic seal durability, and low-noise performance before dispatch, ensuring relentless, stable, and high-efficiency fluid power for your equipment.

Technical Specifications 

• Product Series: Parker PGP Series Gear Pump

• Representative Models: 3349111732, 3349521031, 3349219593, 3349111004

• Specifications Covered: PGP500, PGP503, PGP505, PGP511, PGP517

• Rated Operating Pressure: 21 – 25 MPa (Model-dependent)

• Peak Pressure: 28 MPa

• Speed Range: 500 – 3500 rpm

• Structural Configuration: High-strength cast iron housing, pressure-balanced side-plate compensation

• Fluid Compatibility: Mineral hydraulic oil, 10 – 200 cSt recommended

Key Technical Advantages:

• Pressure-Balance Compensation: Utilizes high-performance side plates that automatically adjust axial clearance based on output pressure. This drastically reduces internal leakage under high loads and maintains superior volumetric efficiency.

• High-Hardness Gear Engineering: Core gear components are manufactured from high-strength alloy steel, precision ground and vacuum-nitrided for exceptional surface hardness and wear resistance, absorbing pressure transients and extending fatigue life.

• Whisper-Quiet Operation: Optimized gear-mesh overlap and flow-path design minimize flow pulsation, significantly reducing fluid-borne noise—making this series ideal for industrial environments with strict acoustic requirements.

• Modular Flexibility: The PGP series supports multi-section configurations (single, tandem, or multiple pumps), allowing users to precisely match front/rear displacements to drive complex multi-circuit systems from a single power source.

Application Areas:

• Industrial Manufacturing: Auxiliary power for injection molding, hydraulic presses, and industrial power units.

• Mobile Machinery: Forklift hydraulics, aerial work platforms, compact excavators, and loaders.

• Agricultural Equipment: Accessory drive systems for tractors and harvesters.

• Municipal Services: Refuse collection vehicles and specialty environmental maintenance equipment.

Expert Maintenance Tips:

• Suction Side Protection: The primary cause of cavitation is air ingestion or excessive resistance in the suction line. Ensure airtight connections and keep suction piping as short as possible; never install undersized filters on the suction side.

• Start-up Purging: After installation, prime the pump housing with clean hydraulic oil through the case or top port. Run at low pressure for 2-5 minutes to purge air until the sound is consistent, preventing dry-start friction on the gear teeth.

• Fluid Cleanliness Management: As these pumps are sensitive to particle contamination, utilize 20μm or finer return-line filtration. Maintain fluid cleanliness within ISO 4406 18/16/13 and perform regular oil analysis to detect degradation or oxidation.