Parker PGP Series Hydraulic Gear Pump Replacement | PGP517 3339111193

Genlu Hydraulic excels as a world-class engineered fluid power component manufacturer, precision aluminum-extrusion specialist, and strategic B2B global supplier of high-capacity hydraulic external gear pumps and complex tandem modular configurations. The PGP Series High-Performance External Aluminum Hydraulic Gear Pump platform (specifically focusing on the definitive PGP500 and PGP517 frame configurations) is engineered as a premium, structurally reinforced, and 100% drop-in interchangeable alternative to the baseline gear pumps manufactured by Parker Hannifin / Commercial Hydraulics. We manage modern multi-axis CNC production cells and retain complete quick-ship warehouse inventory for complex, highly technical replacement codes such as PGP517B0520AE1H3NN4N3S-505A008 (tandem setup), PGP517A0230CD1H3NP3P2B1B1 (single setup), and proprietary Parker 10-digit commercial ordering numbers including 3339111193 and 3339111308.

Operating as the primary working fluid control heart for mobile construction equipment, aerial work platforms, municipal vocational trucks, and agricultural attachment steering manifolds, a medium-to-high pressure gear pump must withstand continuous severe pressure loading (up to 250 bar) without experiencing thermal volumetric fade. Genlu’s PGP series pumps conform directly to the precise engineering specifications found in original manufacturer technical manuals. We guarantee perfect drop-in retrofit layout compatibility across standard SAE 2-bolt mounting flanges (such as SAE B pilots), involute splined or keyed input drive shafts, split-flange fluid port geometric center distances, and the dual-plate pressure-balanced internal assembly. Prior to final quality packaging release, every gear pump assembly undergoes 100% Full-Simulation Condition Testing on digitized diagnostic stands to verify that volumetric efficiency remains above 93% under maximum pressure and thermal conditions.

Technical Specifications 

• Product Line: PGP Series High-Performance External Aluminum Hydraulic Gear Pump (100% cross-compatible with Parker PGP500 / PGP517 standards)

• Core Covered Specific Configurations & Cross-Mapping:

  • PGP517B0520AE1H3NN4N3S-505A008 Variant (PGP517B designates a tandem pump housing with thru-drive configuration; displacement code 0520 signifies 52.0 cc/rev for the primary front section; equipped with SAE B 2-bolt mounting flange and specific splined drive shaft; directly replacing commercial codes 3339111193 / 3339111308)

  • PGP517A0230CD1H3NP3P2B1B1 Variant (PGP517A designates a single-section pump structure; displacement code 0230 signifies 23.0 cc/rev; C profile input drive journal paired with D standard mounting configuration)

• Volumetric Frame Displacement Profiles:

  • 0230 Specification: 23.0 $cc/rev$ ($1.40\,in^3/rev$)

  • 0520 Specification: 52.0 $cc/rev$ ($3.17\,in^3/rev$)

  • (Full series accommodates a comprehensive displacement matrix from 16.0 $cc/rev$ up to 52.0 $cc/rev$)

• Continuous Rated Operating Pressure: 250 bar (25 MPa / 3625 psi) continuous loading envelope

• Maximum Intermittent Intermittent Peak Pressure: Rated up to 275 bar (27.5 MPa / 4000 psi) resisting transient system relief overshoots

• Permissible Input Rotational Speed Range: From 2400 rpm up to 3400 rpm depending on specific displacement volume and oil inlet feed conditions

• Minimum Stable Operating Idle Speed: 500 rpm

• Primary Structural Metallurgy: High-tensile aerospace-grade extruded aluminum alloy pump body, complemented by high-strength ductile iron front and rear covers

• Multi-Stage Tandem Stacking Capability: 100% rated for multi-section configurations (double, triple, or quadruple tandem) utilizing independent internal section seals to prevent fluid cross-migration

Key Technical Advantages:

• High-Tensile Extruded Aluminum Body for Structural Integrity: Unlike standard die-cast aluminum pumps, the PGP517 core body is precision-extruded from dense, aerospace-grade aluminum alloys. This process ensures a uniform internal grain structure free from micro-voids or porosity. Under continuous 250 bar loads, radial expansion of the casing is minimized, preventing premature wear between the gear teeth tips and the internal housing walls.

• Pressure-Balanced Thrust Plates with Specialized Wear Coatings: The gear faces are flanked by precision-machined alloy thrust plates. Specialized “3-shaped” hydrostatic pressure seals and anti-extrusion backing blocks are integrated onto the rear faces of these plates. This arrangement routes pressurized system oil behind the plates, providing optimal clamping force against the gear faces for automatic axial clearance compensation and sustained volumetric efficiency.

• Heavy-Duty Monolithic DU Journal Bushings for Low-Friction Operation: The internal gear shafts run on high-capacity, single-piece PTFE-lined composite journal bushings instead of standard needle bearings. This setup eliminates the risk of catastrophic pump failure due to loose roller needles, provides excellent vibration damping when handling shaft deflection or small radial preloads, and keeps full-load operating noise below 72 dB.

• One-Piece Forged High-Tooth Profile Alloy Gear Sets: Both the drive and driven gear shafts are forged from premium alloy steel (e.g., 20CrMnTi), followed by case hardening and precise profile grinding. The gear tooth geometry is hydrodynamically optimized to reduce fluid trapping and output pressure ripples, ensuring a consistent, uniform fluid flow while maintaining a surface hardness above HRC60.

Application Areas:

• Mobile Construction & Earthmoving Machinery: Primary fluid supply for wheel loader pilot circuits, medium excavator independent cooling fan loops, and small dozer attachment controls.

• Specialized Vocational Vehicles & Aerial Lift Equipment: Main lift pumps for scissor and boom-type aerial work platforms, refuse compaction truck control manifolds, and heavy commercial truck liftgates.

• Modern Agricultural & Forestry Mechanization: Primary hydraulic power for combine harvester steering controls, header lift mechanisms, and large agricultural tractor three-point linkage systems.

Expert Maintenance Tips:

• Verify Total Input Torque Thresholds on Multi-Stage Tandem Assemblies: In multi-stage assemblies like the PGP517B0520, the primary drive shaft transfers the combined torque of all downstream pump sections. When coupling the pump to an engine or motor via a flexible coupling, always verify that the total operating torque does not exceed the main input shaft’s shear limit. Never use a hammer to force a coupling onto the shaft, as axial impacts can crack the internal thrust plates or snap rings, causing internal failure upon startup.

• Prevent Aeration and Dry-Run Scuffing in Aluminum Components: Extruded aluminum gear pumps are highly sensitive to air ingestion. If the intake line draws air or if the fluid becomes heavily emulsified, the protective oil film on the wear components will fail. Running dry for even 30 seconds can cause rapid friction welding (galling) between the steel gears and the aluminum housing, leading to a locked rotor condition. Ensure all intake connections are vacuum-tight.

• Mandatory System Flushing and Filter Optimization Prior to Retrofitting: When replacing an original pump assembly (such as 3339111193 or 3339111308) that has failed due to internal wear, fine metallic debris will remain suspended in the system oil. Before installing the new pump, flush all hydraulic lines, thoroughly clean the main reservoir, and replace both suction and return filter elements. Maintain a fluid cleanliness standard of ISO 4406 19/16 or NAS 8 to protect the new components.