Parker Gear Oil Pump | PGP051

Parker PGP051 Series Fixed Displacement Gear Oil Pumps

Parker’s PGP051 Series fixed/positive displacement gear oil pumps are engineered for long-lasting performance and superior resistance to oil contamination. Constructed with high-strength cast iron housings and roller bearing support, these hydraulic gear pumps deliver consistent, reliable operation even in the toughest environments.

Part of Parker’s renowned line of commercial gear pumps, the PGP051 Series is designed to provide smooth, efficient flow in both mobile and industrial hydraulic systems. Its rugged design makes it ideal for vocational trucks, winches, oil and gas equipment, and other high-demand hydraulic applications.

Available in single or multi-section configurations, the PGP051 Series gear pumps can also be equipped with an integral valve option, offering flexibility for complex hydraulic circuits. The precision-machined components and positive displacement design ensure dependable output, extended service life, and easy integration into custom hydraulic systems.

Technical Specifications

• Operating Pressure: up to 3000 psi, up to 207 bar
• Flow Rate: n/a
• Displacement: up to 105 cm3/rev, up to 6.4 inch3/rev
• Body Material: Cast Iron
• Drain Option: No
• Charge Pump Included: No
• Circuit Path: Open
• Configuration: Single, Tandem, Multiple
• Control Method: Relief
• Energy Recovery Capability: No
• Filter Included: No
• For Fluid Type: Standard Hydraulic Fluids, Phosphate-ester
• Maximum Displacement: 105 cm3/rev, 6.4 inch3/rev
• Maximum Flow Rate: 63 gal/min
• Maximum Fluid Temperature: 80 °C, 180 °F
• Minimum Fluid Temperature: -20 °C, 0 °F
• Maximum Operating Pressure: 207 bar, 3000 psi
• Radial Load Capacity: Consult Parker, Consult Parker
• Maximum Operating Speed: 2400 RPM
• Maximum Kinematic Viscosity: 7500 SUS
• Minimum Kinematic Viscosity: 50 SUS
• Weight: 22.5 kg (Max), 50 lb (Max)
• Media: Liquid, Liquids
• Mounting Option: SAE, ISO, DIN
• Port Connection: SAE, ISO, NPT, BSPP, ODT
• Port Type: Flange, Straight Threaded
• Port Location: Side Ports, Rear Ports
• Pump Type: Gear, Fixed
• Direction of Rotation: Clockwise, Counterclockwise, Bi-Rotational
• Shaft Type: SAE, ISO, DIN, Industry Specific
• Thru-Drive Capability: No

Key Benefits

• Three-piece cast iron construction for distribution flexibility
• Cast Iron construction for durability
• Balanced Thrust Plates minimize friction and leakage
• Roller bearings for durability
• Multiple sections available

Examples of Suitable Applications

• Tire Trucks
• Salt and sand spreaders
• Aerial Lift
• Roll Off Truck
• Moving Floor Truck
• Refuse Truck
• Oil & Gas Service Trucks