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25503
Green Hydraulic
25503
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
Product Description
The Eaton 25503 is a high-performance, fixed-displacement aluminum gear pump engineered for compact hydraulic systems that demand high power-to-weight efficiency and reliable high-pressure, high-flow output. Featuring a lightweight yet robust high-strength cast aluminum construction, the 25503 is specifically designed to deliver consistent performance while minimizing overall system weight, making it an ideal choice for mobile equipment where payload reduction and compact packaging are critical.
Specifications
| Parameter | Specification |
| Pump Type | External fixed-displacement aluminum gear pump |
| Displacement | 33.6 cm³/rev (2.05 in⊃3;/rev) |
| Max Continuous Pressure | 248 bar (3,600 psi) |
| Max Intermittent Pressure | 276 bar (4,000 psi) |
| Rated Speed | 3,000 rpm |
| Max Speed | 3,600 rpm |
| Theoretical Flow @ 3000 rpm | 100.8 L/min (26.6 gpm) |
| Rotation | Field-reversible (R = clockwise / L = counterclockwise) |
| Mounting Flange | SAE “B” 2-bolt |
| Drive Shaft | Standard 7/8” 13-tooth spline (SAE J498b) |
| Port Configurations | Side or rear inlet/outlet ports |
| Housing Material | High-strength cast aluminum alloy |
| Operating Temperature Range | -20°C to +80°C (-4°F to +176°F) |
| Recommended Hydraulic Oil | Premium mineral-based hydraulic fluid with Anti-Wear (AW) additives |
| Recommended Viscosity | 20–30 cSt (100–150 SUS) at operating temperature |
| Filtration Requirement | ISO 4406 18/16/13 or better |
Applications
Applications
Mobile Construction & Utility Vehicles: Ideal for aerial lifts, skid-steer loaders, and compact excavators, where the aluminum housing reduces overall vehicle weight while delivering the higher flow needed for simultaneous lifting, tilting, and auxiliary functions.
Agricultural Equipment: Commonly used in tractors, harvesters, and fertilizer spreaders, where its resistance to shock loads and fluid contamination ensures consistent performance in demanding outdoor field environments.
Material Handling Systems: Perfect for forklifts, pallet jacks, and truck tail-lifts, offering a durable, space-efficient power source that maintains high efficiency under heavy, continuous-load conditions.
Snow & Ice Control: Optimized for salt spreaders and plow systems, where the corrosion-resistant aluminum construction and pressure-balanced design provide long-term durability against moisture and frequent duty cycles.
Commercial Refuse & Recycling: Widely applied in compact waste collectors and bin lifters, delivering the high-cycle, high-pressure stability needed for fast compaction and unloading operations.
Light Industrial Hydraulics: Used in presses, machine tools, and conveyor systems, where its smooth flow and low noise operation improve both productivity and workplace comfort.
Factory&FAQ
25503 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.
Lightweight Aluminum Housing: Compared to cast iron pumps, the 25503 significantly reduces overall system weight, making it ideal for payload-sensitive mobile equipment designs.
Pressure-Balanced Wear Plate Design: It utilizes precision pressure-compensated wear plates that automatically adjust internal clearances, minimizing leakage and maintaining high efficiency even under varying pressure and temperature conditions.
Versatile Porting Options: Available with both side and rear port configurations, the 25503 offers greater installation flexibility in tight chassis environments than many fixed-port designs.
Continuous Pressure: Up to 3,600 PSI (248 bar).
Intermittent/Peak Pressure: Up to 4,000 PSI (276 bar).
This robust pressure rating makes it suitable for powering a wide range of mobile equipment functions, from high-flow lifting to material handling systems.
Other Eaton/Vickers L2 series pumps
Equivalent models from Parker, Commercial Intertech, or Metaris.
To ensure a successful swap, verify the Mounting Flange (SAE B), Shaft Type (13-tooth spline), and Displacement (33.6 cm³/rev) to match your existing system.
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).
Filtration: A minimum filtration of ISO 4406 18/16/13 is recommended to prevent abrasive particles from damaging the gear and wear plate surfaces.
Rated Operating Speed: Up to 3,000 RPM.
Maximum Intermittent Speed: Up to 3,600 RPM.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
Please provide the following details:
Model or displacement
Working pressure
Speed
Quantity
We will reply within 12 hours with a competitive quotation.
25503 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.
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.
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.
Of course we can. Just send me your logo we can make it for you.
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%).
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.
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.
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.
All hydraulic pumps produced by Green Hydraulic have undergone compliance testing, ensuring their quality and reliability.
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.
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.
