Product Overview

The 1U2221 Hydraulic Double Vane Pump 3525VQV10 is a high-performance, fixed displacement, high-speed, and pressure-balanced hydraulic pump. Engineered for robust and reliable operation, this pump is specifically designed to meet the rigorous demands of heavy machinery, ensuring optimal hydraulic power for critical applications. Its double vane design contributes to a smoother flow and reduced pulsation, making it an excellent choice for systems requiring precise and consistent performance.

Key Product Parameters

• ✓ Volumetric Efficiency: >90% for superior energy conversion.

• ✓ Low Noise Levels: As low as 62 dB(A), enhancing operator comfort and reducing environmental impact.

• ✓ Max Operating Pressure: Up to 207 bar (3000 psi) / 210 bar, suitable for demanding hydraulic systems.

• ✓ Max Speed: Up to 2500 rpm, ensuring rapid response and fluid delivery.

• ✓ Displacement (Shaft End): 81-121 cm³/r (4.9-7.4 in³/r).

• ✓ Displacement (Cover End): 33-67 cm³/r (2.0-4.1 in³/r).

• ✓ Design: Pressure-balanced intravane design for long service life.

Product Advantages & Selling Points

• ★ Exceptional Efficiency: Over 90% volumetric efficiency minimizes energy waste and operating costs.

• ★ Reduced Noise & Pulsation: Advanced intravane design ensures quiet operation and smooth fluid delivery.

• ★ Compact & Powerful: High power-to-weight ratio allows for high performance in a compact footprint, leading to lower installation costs.

• ★ Extended Lifespan: Hydraulic balancing prevents internal radial shaft and bearing loads, significantly increasing pump durability.

• ★ Easy Maintenance: Features factory-tested cartridge kits for quick and efficient field serviceability, restoring new pump performance upon installation.

Applicable Equipment & Application Scenarios

The 1U2221 Hydraulic Double Vane Pump 3525VQV10 is primarily suitable for the Caterpillar Loader 950B. Its robust design and performance characteristics also make it ideal for a wide range of other heavy-duty Caterpillar equipment and general hydraulic applications:

Applicable Caterpillar Equipment:

• Wheel Loaders: Caterpillar 950, 950F, 963, 950E, 963 LGP, 966C, 966D, 966F, 966G, 966H.

• Engines: Compatible with Caterpillar 3304, 3116 engines found in various machinery.

• Dozers: Such as Caterpillar D6D, D6C, D5D.

Application Scenarios & Case Analysis:

This pump is a cornerstone in hydraulic power units, delivering pressurized hydraulic fluid to various hydraulic systems. In heavy machinery like wheel loaders, it's crucial for operating functions such as:

• Lifting and Tilting: Powering the lift and tilt cylinders for the loader bucket, enabling efficient material handling and excavation.

• Steering Systems: Providing responsive and precise control for maneuverability in demanding environments.

• Braking Systems: Contributing to the hydraulic braking system for safe and reliable stopping power.

Case Study: Caterpillar Loader 950B in Construction
       In a typical construction site, a Caterpillar 950B loader equipped with the 1U2221 hydraulic pump excels in tasks like loading aggregates, excavating earth, and moving heavy materials. The pump's consistent pressure and flow ensure that the loader's bucket operates smoothly and powerfully, even under maximum load. Its high efficiency minimizes fuel consumption, while low noise levels contribute to a more comfortable working environment for the operator. The pump's reliability directly translates to increased uptime and productivity, reducing maintenance interruptions and costly delays on site. This ensures that projects stay on schedule and within budget, highlighting the critical role of a dependable hydraulic system.

Related Products & Applicable Equipment

Beyond the 3525VQV10, our range includes other high-quality hydraulic double vane pumps and related components designed for various applications:

• ● Vickers/Eaton V-Series Vane Pumps: Including 20V, 25V, 35V, and 45V series, available in single and double pump configurations (e.g., 2520V, 3520V, 4520V, 4525V, 4535V). These pumps offer a range of displacements and pressure capabilities to suit diverse industrial and mobile hydraulic systems.

• ● Vane Pump Cartridges: Such as 4T-1893, 3G2234, and 7G4856, which are common replacement or alternative hydraulic pump cartridges/pumps for Caterpillar 950B and other similar heavy equipment. These are designed for quick and easy replacement to restore pump performance.

These related products are widely used in:

• Industrial Machinery: Plastic injection molding machines, presses, and general factory automation.

• Mobile Equipment: Construction machinery (excavators, bulldozers, graders), agricultural equipment, and utility vehicles.

• Hydraulic Power Units: Serving as the core of hydraulic systems in various industries.

• Aerospace Industry: For demanding control and actuation systems.

Installation & Maintenance: Common Issues and Solutions

Proper installation and regular maintenance are crucial for the longevity and optimal performance of your hydraulic pump. Here are common issues and their effective solutions:

Common Problems:

• Pump Does Not Prime/Draw Fluid: Often due to low fluid levels, closed inlet valves, air ingress in connections, blocked filters, or suction line restrictions.

• Reduced Flow & Pressure: Can be caused by low pump speed, restricted suction or discharge lines, worn vanes, incorrect relief valve settings, or improper vane installation/rotation.

• Noisy Pump (Cavitation): Typically indicates air intrusion, low inlet pressure, high pump speed, fluid contamination, or incorrect fluid viscosity. This can sound like marbles inside the pump.

• Leaks (Shaft, Seals): May result from bearing failure, hardened or worn seals (often due to overheating), external contamination damaging the seal, or a bent rod.

• Overheating: Excessive heat can break down hydraulic fluid and accelerate component wear.

• Contamination: Solid particles or water in the fluid can cause rapid wear of vanes, rotors, and cam rings.

Solutions & Best Practices:

• ✓ Fluid Management: Regularly check hydraulic fluid levels in the reservoir. Ensure the correct type of hydraulic fluid is used and maintained at optimal cleanliness. Change fluid according to manufacturer schedules.

• ✓ Filter & Strainer Maintenance: Clean or replace hydraulic filters and suction strainers regularly to prevent contamination. Monitor filter blockage indicators.

• ✓ Leak Inspection: Routinely inspect all seals, hoses, fittings, and connections for any signs of leaks or damage. Address minor leaks promptly to prevent pressure drops and contamination.

• ✓ System Monitoring: Monitor fluid temperature, avoiding prolonged operation above 140°F (60°C). Test system pressure and flow periodically and compare with manufacturer specifications.

• ✓ Proper Installation & Assembly: Ensure vanes are installed correctly and facing the right direction. Verify shaft and coupling alignment.

• ✓ Operational Procedures: Always follow manufacturer-recommended startup and shutdown procedures to prevent pressure spikes and ensure proper air bleed-off.

• ✓ Training: Ensure operators and maintenance personnel are trained on hydraulic basics and safe handling, recognizing early signs of wear or malfunction.