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1AG External Hydraulic Gear Pump

The 1AG series is a compact, high‑pressure external gear pump designed for hydraulic systems. It features a durable aluminum alloy housing, precision‑ground alloy steel gears, and pressure‑balanced design for high efficiency, low noise, and long service life. Available with SAE AA/ISO flanges, multiple shaft and port configurations, it delivers fixed displacement with continuous pressure up to 3000 psi (210 bar) and speeds of 600–4000 rpm. Ideal for material handling, construction, and industrial machinery.
  • 1AG

  • Green Hydraulic

  • 1AG

  • 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

1AG Gear Pump  Overview

The 1AG series is a high-performance, fixed-displacement external gear pump engineered for compact hydraulic systems that demand maximum efficiency and reliable high-pressure output. Featuring a lightweight yet rugged three-piece aluminum alloy construction, the 1AG is specifically designed to deliver an excellent power-to-weight ratio, making it an ideal choice for direct mounting to truck Power Take-Offs (PTOs) and mobile equipment where space is limited and performance is critical.1AG

Features and Benefits

  • Rugged Three-Piece Aluminum Alloy Construction:

    The 1AG is built with high-strength, corrosion-resistant aluminum alloy bodies and covers, offering an optimal balance of structural rigidity and light weight compared to cast iron alternatives. This robust construction minimizes internal deflection under high-pressure duty cycles, ensuring stable performance and extended service life in demanding environments.

  • High-Performance Pressure-Balanced Bushing Design:
    Utilizing advanced pressure-balanced bushings instead of traditional bearings, the 1AG provides increased bearing surface area for superior high-pressure operation. This design is inherently more tolerant of fluid contamination and thermal shock, maintaining high volumetric efficiency while protecting the pump from premature wear during intensive use.
  • Advanced Pressure-Compensated Wear Plates:
    Equipped with sophisticated axial compensation technology, the 1AG features pressure-balanced wear plates that automatically optimize internal clearances between the gear faces and the housing. This minimizes internal fluid bypass and friction, ensuring exceptional mechanical efficiency and consistent power delivery across all operating temperatures.
  • Superior High-Pressure Capability:
    Despite its compact footprint, the 1AG is engineered to handle continuous operating pressures of up to 3,000 psi (210 bar) (with intermittent ratings up to 3,600 psi). Its high-strength alloy steel gears and precision-machined components allow it to power high-force actuators and complex hydraulic circuits with smooth, reliable flow.
  • Modular Versatility and Installation Flexibility:
    The 1AG series offers a versatile range of displacements (typically from 0.19 to 1.86 cu.in/rev) and supports standard SAE "AA" mounting configurations. With dual-porting options (both side and rear ports available), it provides unmatched installation flexibility for cramped chassis environments and specialized mobile applications.

Specifications

Model Codes

1AG(1)

Technical Data

Parameter Specification
Type External, fixed-displacement gear pump
Construction 3-piece aluminum alloy housing with high-strength alloy steel gears
Displacement Range 3.0–35 cc/rev (0.18–2.14 cu.in/rev)
Continuous Pressure 210 bar (3,000 psi)
Intermittent Pressure 250 bar (3,600 psi)
Speed Range 600–4,000 rpm
Max Flow @ 1500 rpm 4.5–52.5 L/min (1.19–13.87 gpm)
Mounting Flange SAE AA 2-bolt standard
Port Configurations Side or rear ports (dual-port design)
Shaft Types Keyed, splined, or custom profiles
Rotation Clockwise (CW), Counterclockwise (CCW), or bi-rotational
Seal Options Buna-N (standard), Viton (high-temperature)
Operating Temp Range -20°C to +80°C (-4°F to +176°F)
Fluid Viscosity 10–100 cSt (recommended 20–30 cSt at operating temp)
Filtration Requirement ISO 18/15 or better (25 μm absolute filter)
Weight 1.0–1.8 kg (2.2–4.0 lbs), depending on displacement

1AG Hydraulic Gear Pump Installation Dimensions


1AG(2)


Applications

Applications

The 1AG series provides a compact, high-pressure power solution specifically tailored for mobile and truck-mounted applications where space is limited and reliable hydraulic performance is required:
  • Utility & Service Vehicles: A primary choice for light-duty truck-mounted cranes, bucket trucks, and aerial lifts, where the compact 1AG frame integrates easily with Power Take-Off (PTO) units to deliver dependable lifting and positioning power.

  • Snow & Ice Control: Ideal for small salt spreaders and lightweight plow systems, where the robust construction and bushing design ensure long-term durability against harsh, corrosive winter environments and frequent use cycles.

  • Commercial Refuse & Recycling: Widely used in small-frame waste collectors and bin lifters that require consistent high-cycle, high-pressure performance for compacting and unloading operations.

  • Small Material Handling: Perfect 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 small implement steering systems, where the 1AG reliably handles variable load shocks and fluid contamination common in outdoor field environments.

  • Compact Industrial Hydraulics: Suited for small presses, conveyor drives, and auxiliary power units (APUs) in mobile machinery, where its small footprint and high efficiency make it a versatile choice for tight-space installations.


Vane Pump Application


Factory&FAQ

Packaging & Delivery

Shipping Methods

1AG 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.


1AG Gear Pump  FAQ

1. What are 1AG series gear pumps

The 1AG is a high-performance, fixed-displacement external gear pump. It features a lightweight three-piece aluminum alloy construction, engineered for compact hydraulic systems requiring reliable power output, especially for direct mounting to truck Power Take-Offs (PTOs) and mobile equipment.

2. What makes the 1AG different from standard gear pumps

  • Lightweight High-Strength Housing: Unlike heavy cast iron pumps, the 1AG’s aluminum alloy body offers a superior power-to-weight ratio while maintaining tight internal clearances under high pressure, reducing overall vehicle weight.

  • Pressure-Balanced Bushing Design: It uses advanced pressure-compensated bushings instead of traditional bearings, providing better resistance to fluid contamination and thermal shock than many basic gear pump designs.

  • Flexible Porting Options: Standard with both side and rear ports, the 1AG offers greater installation flexibility in cramped chassis environments than fixed-port pumps.

3. What is the working pressure range of 1AG pumps

The 1AG is optimized for compact high-pressure applications. Depending on displacement, the typical ratings are:

  • Continuous Pressure: Up to 3,000 PSI (210 bar).

  • Intermittent/Peak Pressure: Up to 3,600 PSI (250 bar).

This robust rating makes it ideal for light-duty lifting, compaction, and material handling systems on utility vehicles.

4. Can 1AG pumps replace other brands

Yes, the 1AG is a cost-effective, high-quality alternative to many standard compact gear pumps. It is often used as a replacement or upgrade for:

  • Parker/Commercial Intertech: P1A/P2A Series

  • Metaris: MH100/MH200 Series

  • Permco: P100/P200 Series

To ensure a successful swap, verify the Mounting Flange (SAE AA), Shaft Type (keyed or splined), and Displacement (cc/rev) to match your existing system.

5. What hydraulic oil is suitable for 1AG gear pumps

To protect the precision bushings 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 bushing lubrication. A minimum filtration of ISO 4406 18/16/13 is recommended to prevent abrasive particles from damaging internal components.

6. What is the typical speed range of 1AG pumps

The standard operating speed range is 600–4,000 RPM, with optimal efficiency between 1,500–3,000 RPM.

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

1AG 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.


Green Hydraulic Advantages
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