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P51 Parker Hydraulic Gear Pump

The P51 (P5100) gear pump is a heavy-duty, high-flow bushing cast iron hydraulic pump. It is designed to provide robust performance and reliable fluid dynamics in demanding heavy-duty hydraulic applications.
  • P51

  • cissoko

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P51 SERIES Gear Pump  

Overview

Cissoko P51 gear pump is a heavy-duty, high-flow bushing cast iron hydraulic pump. It is designed to provide robust performance and reliable fluid dynamics in demanding heavy-duty hydraulic applications.

Features and Benefits

  • Heavy-Duty Bushing Design: Utilizes high-strength, Teflon-coated sleeve bushings that offer excellent load-carrying capacity, pressure distribution, and superior fatigue resistance.

  • High Flow & Large Displacement: Built with a larger frame size to accommodate wider gear widths, allowing it to move higher volumes of hydraulic oil under heavy work loads.

  • Robust Cast Iron Construction: Constructed with high-tensile doweled cast iron housings to withstand extreme operational stress, minimizing internal deflection and body wear.

  • Flexible Configurations: Supports bi-rotational setups, multiple porting options (such as NPT, O-ring, or Split Flange), and multiple section stacking (piggyback) for multi-circuit setups.

  • Global Interchangeability: Highly standardized across the industry, with exact dimensional and performance replacements widely available from trusted aftermarket manufacturers like Permco, Muncie, and Dynaco.

Model Codes

p51


Technical Data:

Parameter Specification / Value Notes
Pump Type High Pressure Heavy Duty Gear Pump Cast iron body, heavy-duty bushing design
Max Continuous Pressure 2,500 PSI (172 bar) Standard high-pressure rating for P51 size
Max Intermittent Pressure 3,000 PSI (207 bar) Peak transient pressure capability
Speed Range 400 - 2,400 RPM Maintains high efficiency across speed range
Fluid Medium Mineral Based Hydraulic Oil Recommended filtration: 10-25 micron
Mounting Flange SAE C 2/4-Bolt Combination Standard larger SAE C mounting pattern
Drive Shaft Options 1-1/4" 14T Spline / 1-1/4" Keyed Heavy-duty shafts to handle higher torque
Rotation Bi-Rotational (Dual Rotation) Easy to reverse rotation direction in field
Housing Material High Tensile Doweled Cast Iron Premium strength to prevent body deflection

P21 Hydraulic Gear Pump Installation Dimensions

p51-gear-pump-of-cissoko


Applications

The P51 cast iron gear pump is widely used in heavy-duty machinery, commercial vehicles, and industrial hydraulic systems due to its high tensile strength, roller bearing design, and excellent resistance to wear and high pressures.:
Mobile & Vocational Trucks Dump Trucks (hoist), Snowplows (blade/spreader), Refuse Trucks (packer), Tow Trucks (winch/rollback), Bucket Trucks (boom).
Agricultural & Forestry Log Splitters, Wood Chippers, Tractor Implements, Harvesters (auxiliary controls).
Construction & Handling Skid Steers (lift/attachments), Mini Excavators (auxiliary loops), Forklifts (mast lift/tilt).
Industrial & Stationary Waste Balers/Compactors, Hydraulic Presses, Scissor Lifts / Lift Tables.


Vane Pump Application


Packaging & Delivery

Shipping Methods

P51 pumps are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the pump from environmental damage.

Custom Crates: For larger, heavier pumps, ensuring safe handling.

Documentation: Includes installation, maintenance instructions, and warranty details.

Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.


P51 Gear Pump  FAQ:

1.What is the maximum pressure rating for a P51 gear pump?

The P51 pump has a maximum continuous working pressure of 2,500 PSI (172 bar) and can handle intermittent peak pressures up to 3,000 PSI (207 bar).

2.What are the typical mounting flange and drive shaft options for the P51 series?

It usually features a standard SAE C 2/4-bolt combination mounting flange, along with heavy-duty shaft options like a 1-1/4" 14-tooth spline or a 1-1/4" keyed shaft to handle high torque.

3.Can a P51 gear pump be used as a multiple section pump?

Yes, the P51 series supports multiple section stacking (piggyback configuration) on a single drive shaft, allowing it to supply separate, independent flows to multiple hydraulic circuits.

4.How do you reverse the rotation of a P51 pump?

Most P51 pumps are bi-rotational. You can change the rotation direction in the field by disassembling the unit, flipping the pressure-balanced wear plates, and swapping the positions of the drive and driven gears.

5.Which aftermarket manufacturers offer direct equivalent models to the Parker Commercial P51?

You can find 100% dimensionally and functionally interchangeable replacements from major trusted brands such as Permco (P5100 series), Muncie, and Dynaco.

6. Do you provide OEM or customized services

Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.

Certifications & Quality Assurance

P51 pumps are manufactured in compliance with international standards, ensuring high performance and reliability:

ISO 9001: Certified for quality management systems.

CE Certification: Ensures compliance with European safety, health, and environmental protection standards.

RoHS Compliance: Ensures the pump does not contain hazardous materials.

Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.



Green Hydraulic Patent Certificate

FAQ

1.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.


2.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.


3.Can you make my own brand on the products?

Of course we can. Just send me your logo  we can make it for you.


4.What is our main export market?

America(40.5%):USA, Canada, Argentina, Brazil

Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).


Unedited footage of the Green Hydraulic Factory

The Cissoko hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.

Unedited footage of the Green Hydraulic Factory

The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.

Unedited footage of the Green Hydraulic Factory

Cissoko Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.

Unedited footage of the Green Hydraulic Factory3

All hydraulic pumps produced by Cissoko Hydraulic have undergone compliance testing, ensuring their quality and reliability.

Unedited footage of the Green Hydraulic Factory4

To meet the diverse needs of different industries, the Cissoko hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.

Unedited footage of the Green Hydraulic Factory5

Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.


Green Hydraulic Advantages
CISSOKO LOGO CISSOKO LOGO CISSOKO LOGO CISSOKO LOGO CISSOKO LOGO






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CISSOKO specializes in dump truck hydraulic parts, delivering reliable lifting kits and full hydraulic solutions for global tipper vehicle manufacturers.

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