Hydraulic Gear Pumps for Construction Machinery
Essential components for power transmission in heavy-duty equipment.

Product Overview
Our hydraulic gear pumps are high-quality, durable components designed to meet the rigorous demands of various construction and industrial applications. They are engineered to deliver reliable performance, ensuring your machinery operates at peak efficiency. From loaders and bulldozers to graders and tractors, these pumps are the heart of the hydraulic system, converting mechanical energy into fluid power to control and move heavy loads.
Key Features & Benefits
✓ High Efficiency: Precision engineering minimizes internal leakage and maximizes power transfer.
✓ Durable Construction: Made from high-strength materials to withstand extreme pressures and harsh operating conditions.
✓ Wide Compatibility: A broad range of models are available to fit multiple machinery brands and types.
✓ Excellent Reliability: Consistent performance reduces downtime and extends the life of your equipment.
Technical Specifications
| Part Numbers | 11C0026, 705-14-41040, 7S4629, 705-52-40100, 10Y-61-04000, 705-11-33100, 87540839, 07430-72203, 07431-11100, 23A-60-11102, 9P9610, 1233472, J20-06-18000, 705-56-34130, etc. |
| Flow Rate | Varies by model (e.g., specific displacement like KZP4-27ASRBDNZMEC1 or SGP1A36C2H1-L291D) |
| Pressure Rating | High-pressure capability for demanding applications |
| Material | Aluminum alloy, cast iron, and other high-grade metals |
Application Scenarios & Case Studies
These hydraulic gear pumps are critical for the operation of heavy-duty machinery in a wide array of applications. They are used in:
Construction Sites: Essential for the hydraulic systems of XGMA Loader 932III, Loader WA450-1/WA470-1, and Bulldozer D375A-2, enabling functions like lifting, steering, and blade control. A common application is in large-scale earthmoving projects where loaders and bulldozers are used for excavation and grading.
Mining & Quarrying: In harsh environments, pumps like the one for Bulldozer SD13 provide the robust hydraulic power needed to operate heavy equipment for rock breaking and material transport.
Agriculture: Pumps for Tractor 5640/6640/7740 are vital for operating front loaders, implements, and steering systems, making farming tasks more efficient.
Road Building: Graders like the Grader GD511A-1 rely on precise hydraulic control for blade adjustments, and our pumps ensure this precision for creating smooth, level surfaces.
Case Analysis: A construction company was experiencing frequent steering pump failures on their older loaders. By replacing the old pumps with our durable 705-11-33100 Steering Pump Gear Pump, they saw a significant reduction in maintenance costs and a 30% increase in operational uptime over a six-month period, leading to project completion ahead of schedule.
Related Products
Main Clutch Pump
Part Number: 07431-11100
Specifically designed for the main clutch system of dozers like the Bulldozer D80A-12.
Transmission Pump
Part Number: 7S4629
Crucial for the transmission system in loaders such as the Loader 950.
Oil Pump Drive
Part Number: 9P9610, 1233472
Generic oil pump drives used across various heavy equipment models for efficient lubrication and power.
Maintenance & Troubleshooting Guide
Proper installation and regular maintenance are key to the longevity of your hydraulic pump. Here are some common issues and their solutions:
Issue: Pump Noise or Vibration
Cause: Often due to air entering the system (cavitation) or contaminated hydraulic fluid.
Solution: Check for leaks in suction lines. Ensure the fluid level is correct. Flush the system and replace with clean, recommended hydraulic fluid. Inspect for clogged filters or strainers.
Issue: Reduced Output or Low Pressure
Cause: Can be caused by internal wear, a stuck relief valve, or a leak in the system.
Solution: Check the relief valve setting. Inspect the pump for excessive wear and consider replacement if necessary. Perform a pressure test to locate any leaks in the hydraulic lines or components.
Issue: Overheating of the Pump
Cause: May be a result of running the pump at too high a pressure or flow rate, using the wrong fluid, or a clogged cooler.
Solution: Ensure the system is operating within the specified pressure and flow parameters. Verify that you are using the correct type and viscosity of hydraulic fluid. Clean the hydraulic cooler fins to improve heat dissipation.
