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CGP‑P11 chelsea gear pumps

The Parker Chelsea CGP-P11 series is a light-duty high-pressure hydraulic gear pump, specifically designed to match Chelsea 247/249 series PTOs for truck and mobile vocational vehicle hydraulic systems. It features an SAE A 2-bolt flange, 4-spline shaft, continuous operating pressure of up to 3000 psi, and a displacement range of 0.16–0.87 in³/rev, with side-mounted inlet (3/4" NPT) and outlet (1/2" NPT) ports for easy installation.
  • CGP-P11

  • Green Hydraulic

  • CGP-P11

  • Standard export carton/plywood case

  • Yes

  • ISO9001,CE

  • • Industrial • Energy • Government (Non Aerospace) • HVAC • Mobile • Natural Resources • Transportation (Non Aerospace)

  • 1. Industrial Hydraulic Systems 2. Mobile Equipment (Industrial Vehicles) 3. Construction and Engineering Machinery 4. Metallurgy Industry

  • Key Shaft and Spline shaft

  • 1 set

Availability:
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Product Description

CGP-P11 SERIES Gear Pump  Overview

The Chelsea CGP-P11 is a rugged, fixed-displacement gear pump purpose-built for mobile hydraulic systems requiring reliable performance in truck PTO (Power Take-Off) applications, where compact packaging and durability are essential. Designed for demanding on-vehicle use, it delivers consistent power in tight spaces without compromising reliability.

Features and Benefits

  • Rugged Cast Iron Construction

    The CGP-P11 features heavy-duty cast iron bodies and covers, offering superior structural rigidity compared to aluminum pumps. This robust design minimizes internal deflection under high-pressure loads, extending service life and maintaining stable performance in harsh, continuous-duty environments.
  • High-Efficiency Gear and Bearing System

    Engineered with precision-machined gears and advanced bearing elements, the CGP-P11 delivers smooth, consistent flow while reducing mechanical wear. The system tolerates fluid contamination and thermal shock better than basic designs, preserving volumetric efficiency through long-term intensive use.
  • Pressure-Compensated Design for Low Friction

    Equipped with optimized internal clearances, the pump minimizes fluid bypass and friction across all operating temperatures. This axial compensation capability ensures reliable power delivery, reduces energy loss, and maintains high mechanical efficiency under varying loads.
  • Dependable High-Pressure Performance

    Built for continuous-duty high-pressure operation, the CGP-P11 handles the demands of mobile hydraulic circuits with durable alloy steel gears and precision components. It delivers steady, reliable flow to power actuators and complex systems in work trucks and specialty mobile equipment.
  • Modular Versatility and Installation Flexibility

    The CGP-P11 series offers a versatile range of displacements, supporting standard SAE mounting configurations for direct integration with Chelsea PTOs. With multiple port options (side/rear), it adapts to cramped chassis layouts, providing unmatched installation flexibility for specialized on-vehicle hydraulic applications.

Model Codes

CGP‑P11(1)

Technical Data

Pump Type Displacement Range Continuous Pressure Max Intermittent Pressure Speed Range Volumetric Efficiency Mechanical Efficiency Mounting Ports Material Fluid Type Temp Range Weight
Fixed-displacement gear pump 10.2–40.6 cc/rev Up to 3,500 psi (241 bar) 4,000 psi (276 bar) 500–3,000 rpm ≥93% (rated conditions) ≥90% (rated conditions) SAE "A" / "B" Side / Rear dual-port Cast iron housing, alloy steel gears ISO VG 32–68 hydraulic oil -20°C to +80°C 3.2–5.4 kg (varies by size)

CGP-P11 Hydraulic Gear Pump Installation Dimensions

CGP‑P11(2)


Applications

The Chelsea CGP-P11 series delivers a rugged, high-pressure power solution specifically tailored for mobile and truck-mounted applications where space is limited and reliable mechanical strength is critical:
  • Utility & Service Vehicles:
    A go-to choice for truck-mounted cranes, bucket trucks, and aerial lifts, where the compact CGP-P11 form factor integrates seamlessly with Power Take-Off (PTO) units to provide consistent lifting and positioning power.
  • Snow & Ice Control:
    Optimized for salt spreaders and small plow systems, its cast iron construction and durable gear design ensure long-term durability against corrosive environments and high-frequency winter maintenance cycles.
  • Commercial Refuse & Recycling:
    Widely used in small-frame garbage collectors and waste bin lifters, providing the high-cycle, high-pressure stability needed for fast compaction and unloading operations.
  • Small Material Handling:
    Ideal for truck tail-lifts, hydraulic ramp systems, and light-duty pallet jacks, offering a space-efficient, durable power source that maintains high efficiency under heavy load conditions.
  • Specialized Agricultural Equipment:
    Commonly used in seeders, fertilizer spreaders, and implement steering systems, where the CGP-P11 reliably handles variable load shocks and fluid contamination common in outdoor field environments.


Vane Pump Application



Packaging & Delivery

Shipping Methods

CGP-P11 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.


CGP-P11 Gear Pump  FAQ

1. What are CGP-P11 series gear pumps

The CGP-P11 is a high-performance, fixed-displacement gear pump built for compact mobile hydraulic systems. Featuring rugged cast iron construction, it is purpose-engineered for direct mounting to truck Power Take-Offs (PTOs), delivering reliable power and durability in space-constrained environments.

2. What makes the CGP-P11 different from standard aluminum gear pumps

The CGP-P11 is built for durability in demanding mobile environments where aluminum pumps may fail:
  • Rugged Cast Iron Housing: Unlike aluminum pumps that can suffer from body deflection at high pressures, the CGP-P11’s cast iron frame maintains tight internal clearances, extending service life under continuous high-pressure cycles.

  • Robust Gear & Bearing Design: Engineered with precision-machined gears and heavy-duty bearings, it offers greater resistance to thermal shock and fluid contamination than typical aluminum-body pumps.

  • Flexible Port Configuration: With dual side and rear port options, the CGP-P11 provides significantly more installation flexibility in cramped chassis environments than standard fixed-port aluminum designs.


3. What is the working pressure range of CGP-P11 pumps

The CGP-P11 is a compact high-pressure specialist. Depending on the specific displacement, the series typically handles:
  • Continuous Pressure: Up to 3,500 PSI (241 bar).

  • Intermittent/Peak Pressure: Up to 3,750 PSI (258 bar).

This robust pressure rating makes the CGP-P11 ideal for driving high-force lifting and compaction systems on professional-grade utility vehicles.


4. Can CGP-P11 pumps replace other brands

Yes, the CGP-P11 is a high-quality alternative to other premium compact cast iron pumps. It is often used as a replacement or upgrade for:
  • Parker/Commercial Intertec: P315 Series

  • Metaris: MH315 Series

  • Permco: P1900 Series

To ensure a successful swap, verify the Mounting Flange (SAE A or B), Shaft Type (9, 11, or 13-tooth spline), and Displacement (Gear Width) to match your existing system.

5. What hydraulic oil is suitable for CGP-P11 gear pumps

To protect the precision components and hardened steel gears, the following is recommended:
  • Oil Type: Premium mineral-based hydraulic fluids with strong Anti-Wear (AW) additive packages.

  • Viscosity: Standard ISO VG32 to VG68. The optimal operating range is 100 to 150 SUS (20 to 30 cSt), though it can handle cold starts up to 2,000 SUS (430 cSt).

  • Filtration: Cleanliness is vital for long service life. A minimum filtration of ISO 4406 18/16/13 is recommended to prevent abrasive particles from damaging the gear and bearing surfaces.


6. What is the typical speed range of CGP-P11 pumps

The CGP-P11 is optimized for mobile equipment PTO operation. The standard operating speed range is 500–3,000 RPM, with peak efficiency typically achieved between 1,000–2,500 RPM. Always refer to the specific model datasheet for precise speed limits based on your displacement and pressure requirements.

7. 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.

8. How can I get a quotation quickly

Please provide the following details:

  • Model or displacement

  • Working pressure

  • Speed

  • Quantity
    We will reply within 12 hours with a competitive quotation.


Certifications & Quality Assurance

CGP-P11 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.How does the variable displacement work?

The pump's flow is adjusted by changing the angle of an internal swash plate. As the swash plate angle changes, the stroke length of the pistons varies, which in turn changes the volume of fluid displaced per rotation, allowing the flow rate to adapt to the system's needs.


2.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.


3.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.


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

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


5.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 Green 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

Green 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 Green 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 green 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.


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