Product Overview
The PGP350B578SEAB15-7SHAB15-1 (Part Number 3239120292) belongs to the Parker PGP300 Series of three-piece cast iron, fixed-displacement external gear pumps. This model is built on the PGP350 housing platform, with displacement code 578 indicating a geometric displacement of 57.8 cm³/rev (approx. 3.53 in³/rev) .
The PGP300 Series is Parker’s most representative heavy-duty cast iron gear pump/motor platform, comprising four housing sizes – PGP315, PGP330, PGP350, and PGP365 – with displacements ranging from 7.6 to 147.5 cm³/rev. The series is built around three-piece cast iron construction, low-friction bushings, and balanced thrust plate design, delivering exceptional performance and reliability under heavy-duty hydraulic applications.
Manufactured to strict Parker original specifications, this product features 100% form-fit-function interchangeability – mounting dimensions, port configurations, and shaft styles are fully identical to original Parker PGP300 series pumps, requiring zero modifications for direct replacement. Every pump undergoes 100% simulated duty-cycle testing prior to shipment, with performance validation conducted at rated pressure, flow, and actual load conditions.
PGP300 Series Platform Positioning:
PGP315 (Smallest Housing): Displacement 7.6–40.6 cm³/rev, speed 3,000 RPM – for small to medium flow requirements
PGP330 (Small-Medium Housing): Displacement 16.1–64.6 cm³/rev, speed 3,000 RPM – general-purpose mainstream model
PGP350 (Medium-Large Housing): Displacement 20.9–104.5 cm³/rev, speed 2,400 RPM – medium-large flow heavy-duty applications
PGP365 (Largest Housing): Displacement 44.3–147.5 cm³/rev, speed 2,400 RPM – high-flow heavy-duty applications
Technical Specifications
PGP350B578SEAB15-7SHAB15-1 (Specific Model)
Model Number: PGP350B578SEAB15-7SHAB15-1
Parker Part Number: 3239120292
Series: Parker PGP350 Series (PGP300 Platform)
Geometric Displacement: 57.8 cm³/rev (approx. 3.53 in³/rev)
Maximum Continuous Operating Pressure: 241 bar (3,500 psi)
Intermittent/Peak Pressure: 275 bar (4,000 psi)
Maximum Speed: 2,400 RPM
Minimum Speed: 400 RPM
Construction: 3-piece cast iron housing, external gear, journal bushings
Rotation: Bi-rotational (CW/CCW optional)
Mounting: SAE / ISO / DIN flange
Shaft Type: SAE / ISO / DIN splined or keyed
Port Connections: SAE / ISO / NPT / BSPP / ODT
Port Locations: Side ports or rear ports
Body Material: Cast Iron
Fluid Compatibility: Standard hydraulic fluids, phosphate-ester, water-glycol
Maximum Fluid Temperature: 80°C (180°F)
Minimum Fluid Temperature: -20°C (0°F)
Maximum Kinematic Viscosity: 7,500 SUS
Minimum Kinematic Viscosity: 50 SUS
Radial Load Capacity: 510 kg (1,125 lb)
Maximum Flow Rate: 250 L/min (66 gal/min)
Maximum Weight: 27 kg (60 lb)
Thru-Drive Capability: Yes
Configuration: Single / Tandem / Multiple (up to 6 sections)
PGP315 Series (Full Specifications)
Displacement Range: 7.6–40.6 cm³/rev (0.465–2.48 in³/rev)
Maximum Continuous Pressure: 241 bar (3,500 psi)
Maximum Speed: 3,000 RPM
Maximum Flow Rate: 121 L/min (32 gal/min)
Maximum Weight: 10 kg (22 lb)
PGP330 Series (Full Specifications)
Displacement Range: 16.1–64.6 cm³/rev (0.985–3.94 in³/rev)
Maximum Continuous Pressure: 241 bar (3,500 psi)
Maximum Speed: 3,000 RPM
Maximum Flow Rate: 151 L/min (40 gal/min)
PGP350 Series (Full Specifications)
Displacement Range: 20.9–104.5 cm³/rev (1.275–6.375 in³/rev)
Maximum Continuous Pressure: 241 bar (3,500 psi)
Maximum Speed: 2,400 RPM
Maximum Flow Rate: 250 L/min (66 gal/min)
Maximum Weight: 27 kg (60 lb)
PGP365 Series (Full Specifications)
Displacement Range: 44.3–147.5 cm³/rev (2.70–9.00 in³/rev)
Maximum Continuous Pressure: 241 bar (3,500 psi)
Maximum Speed: 2,400 RPM
Maximum Flow Rate: 354 L/min (93.5 gal/min)
Radial Load Capacity: 662 kg (1,460 lb)
PGM315 / PGM330 / PGM350 / PGM365 (Gear Motors)
PGM315 Displacement Range: 7.6–40.6 cm³/rev
PGM330 Displacement Range: 13.5–67.6 cm³/rev
PGM350 Displacement Range: 20.9–104.5 cm³/rev
PGM365 Displacement Range: 44.3–147.5 cm³/rev
Maximum Continuous Pressure: 241 bar (3,500 psi)
Maximum Intermittent Pressure: 275 bar (4,000 psi)
Speed Range: 400–3,000 RPM
Rotation: Bi-rotational
Key Technical Advantages
1. Three-Piece Cast Iron Construction – The Foundation for Heavy-Duty Reliability
The PGP300 Series features 3-piece cast iron housing construction that delivers exceptional structural rigidity and resistance to deformation. Cast iron provides superior damping characteristics, effectively absorbing hydraulic pulsations and mechanical vibrations to significantly reduce operating noise. The excellent thermal conductivity of cast iron ensures uniform temperature distribution across the pump body under continuous high-load operation, preventing localized overheating that could lead to seal failure and loss of precision.
2. Balanced Thrust Plates & Low-Friction Bushings – The Efficiency & Longevity Advantage
The large-area balanced thrust plates and low-friction journal bushings design. The balanced thrust plates automatically compensate for axial clearance across the full pressure range, maintaining minimal end-face leakage and ensuring volumetric efficiency up to 98%. Continuous oil film lubrication between the low-friction bushings and shafts prevents metal-to-metal contact, significantly extending bearing and gear service life.
3. Internal Lubrication Circuit – Maintenance-Free Bearing System
The PGP300 Series incorporates internal oil passages that continuously direct working fluid to all friction interfaces – including bushings, thrust plates, and shaft seals. This ensures that all critical moving components receive adequate lubrication even under severe conditions such as cold starts or low-speed, high-load operation, dramatically reducing maintenance frequency and operating costs.
4. Flexible Multi-Section Pump Configurations – Space & Cost Optimization for System Integration
The PGP300 Series supports single, tandem, and multiple pump configurations – up to six sections in series or parallel. Multi-section configurations allow a single power input to drive multiple independent hydraulic circuits, dramatically reducing installation space, lowering system costs, and simplifying plumbing layouts. Through-drive capability enables stacking additional pumps in series.
5. Integrated Valve Options – Simplified Systems, Reduced Leak Points
Parker’s application engineers have developed an integrated functional valve program that incorporates control valves – typically requiring external mounting – directly onto the pump body. Optional integrated valves include: pressure relief valves, load-sensing unloading valves, priority flow dividers, and load-sensing priority valves. This integration reduces the number of purchased components, eliminates or reduces hoses and fittings (and potential leak points), and significantly lowers pump system assembly labor costs.
Application Areas
Construction Equipment: Wheel loaders, excavator auxiliary pumps, skid-steer loaders, telehandlers, aerial work platforms
Agricultural Machinery: Tractor hydraulics, combine harvesters, sprayers, seeders
Material Handling Equipment: Forklifts, reach stackers, conveyor systems, lift tables
Vocational & Municipal Vehicles: Street sweepers, refuse compactors, salt and sand spreaders, tire trucks
Forestry Equipment: Feller bunchers, skidders
Mining & Oil & Gas: Mining auxiliary equipment, oil & gas drilling
Industrial Hydraulics: Injection molding machines, presses, metallurgical equipment
Turf Equipment: Turf maintenance equipment
Expert Maintenance Tips
1. Fluid Cleanliness Control – The #1 Factor for Service Life
PGP300 Series gear pumps are highly sensitive to fluid cleanliness. Recommended system filtration: ISO 4406 20/18/14 or better. Recommended fluid viscosity: 50–7,500 SUS. Contaminants accelerate wear on bushings and thrust plates, leading to rapid loss of volumetric efficiency. Use recommended fluids including standard hydraulic fluids, phosphate-ester, or water-glycol.
2. Pre-Installation Cleaning & Inspection
Thoroughly clean all piping and fittings prior to installation to ensure no metal chips, sand particles, weld slag, or other contaminants remain. Inspect the pump shaft and coupling condition – any wear detectable by touch requires replacement.
3. Coupling Alignment & Installation
Gear pumps must not be subjected to radial or axial external loads – all external loads must be absorbed by the coupling. Ensure coaxial alignment between the pump shaft and drive shaft meets SAE/ISO/DIN standard requirements. Improper alignment is the leading cause of shaft seal leakage and premature bearing failure.
4. Suction Line Design
The PGP300 Series has a minimum operating speed of 400 RPM, requiring adequate suction line diameter to ensure sufficient oil supply. Suction lines should be as short and straight as possible, avoiding sharp bends and restrictions. Suction vacuum must not exceed allowable limits, otherwise cavitation and noise will occur.
5. First Start-Up & Air Bleeding
After installation, bleed air from the system through the drain port or loosened outlet fitting. Run the pump at low speed under no load in a jogging mode until all air is confirmed to be purged from the system. Gradually apply load to reach rated operating conditions. It is recommended to change hydraulic fluid and filters after the first 50 hours of operation to remove微量 wear debris generated during break-in.
6. Temperature Management
The PGP300 Series has an operating temperature range of -20°C to +80°C. Exceeding this range may cause seal failure or viscosity abnormalities. If oil temperature is too high, check system cooling and fluid condition; if too low, consider pre-heating or using lower-viscosity fluid.
