Shandong Keystone Hydraulic Co.,Ltd
| Payment Terms | T/T |
| Supply Ability | 5,000 units per month |
| Delivery Time | 7 work days |
| Packaging Details | Wooden boxes and cartons |
| Model No | HA4VSO |
| Part Name | Agricultural Machinery |
| Power | Hydraulic |
| Rotation Speed | 2000 rpm |
| Appliion | Construction Machinery Parts |
| Max Operating Temperature | 80°C |
| Brand Name | KERSTERN |
| Model Number | HA4VSO Series |
| Certification | SIO9001 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 5,000 units per month |
| Delivery Time | 7 work days | Packaging Details | Wooden boxes and cartons |
| Model No | HA4VSO | Part Name | Agricultural Machinery |
| Power | Hydraulic | Rotation Speed | 2000 rpm |
| Appliion | Construction Machinery Parts | Max Operating Temperature | 80°C |
| Brand Name | KERSTERN | Model Number | HA4VSO Series |
| Certification | SIO9001 | Place of Origin | China |
| High Light | HA4VSO Excavator Hydraulic Pumps ，Agricultural Machinery Excavator Hydraulic Pumps ，2000rpm variable swash plate hydraulic pump | ||
The HA4VSO axial piston variable displacement pump is a high-performance swash plate-type hydraulic pump engineered specifically for agricultural machinery applications. With a continuous operating pressure of up to 350 bar, it ensures stable and efficient hydraulic power for large tractors and combine harvesters. Its robust design and modular construction make it a reliable solution for demanding farming environments where durability and efficiency are critical.
Large Tractors: Hydraulic power for steering, lifting, and transmission systems.
Combine Harvesters: Efficient control of hydraulic functions such as header lifts, unloading augers, and threshing mechanisms.
Agricultural Implements: Supporting hydraulically driven attachments requiring high pressure and precise control.
High Pressure Capacity: Continuous operation at 350 bar, maximum 400 bar.
Energy Efficient: Variable displacement automatically adjusts flow to match system demand.
Low Noise: Optimized fluid channels reduce operational noise, enhancing operator comfort.
Durable Construction: Built with high-strength materials for long service life in agricultural environments.
Flexible Configuration: Modular design allows adaptation to different hydraulic control systems.
| Size | 40 | 71 | 125 | 180 | 200 | 250/H | 355/H |
|---|---|---|---|---|---|---|---|
| Displacement (cm³) | 40 | 71 | 125 | 180 | 200 | 250 | 355 |
| Max Speed (rpm) | 2600 | 2200 | 1800 | 1800 | 1800 | 1900 | 1700 |
| Rated Pressure | 350 bar | 350 bar | 350 bar | 350 bar | 350 bar | 350 bar | 350 bar |
| Max Pressure | 400 bar | 400 bar | 400 bar | 400 bar | 400 bar | 400 bar | 400 bar |
| Max Flow (l/min) | 104 | 156 | 225 | 324 | 360 | 475 | 604 |
| Weight (kg) | 39 | 53 | 88 | 102 | 102 | 184 | 207 |
High-strength alloy selection
CNC machining for precision parts
Heat treatment for durability
Precision assembly with swash plate mechanism
High-pressure testing & performance validation
Always fill the pump with clean hydraulic oil before start-up.
Maintain oil cleanliness at NAS level 9 or better.
Do not exceed rated speed and pressure.
Perform regular oil and filter changes.
Protect from contaminants and store in clean conditions.
Warranty: 12 months from delivery.
Technical Support: Installation, operation, and troubleshooting guidance.
Spare Parts: Original parts available for long-term supply.
Service Network: Global after-sales service for agricultural customers.
Q1: Is HA4VSO suitable for tractors of all sizes?
A1: Yes, with displacement options from 40 to 355 cm³, it covers small to large-scale agricultural machinery.
Q2: Can it operate with bio-hydraulic oils?
A2: Yes, but operational parameters may be reduced depending on the oil type.
Q3: How often should the hydraulic oil be changed?
A3: It depends on usage, but generally every 1000 operating hours or annually.
Company Details
Business Type:
Manufacturer
Year Established:
2019
Total Annual:
5000000-6000000
Employee Number:
>55
Ecer Certification：
Verified Supplier
Shandong Keystone Hydraulic Co., Ltd. is located in Tai bai hu new district, Jining city, Shandong Province, the hometown of Confucius and Mencius. It is only 40 minutes away from Jining Daxing Airport and Beijing-Shanghai High-speed Railway Station, and only 10 minutes aw... Shandong Keystone Hydraulic Co., Ltd. is located in Tai bai hu new district, Jining city, Shandong Province, the hometown of Confucius and Mencius. It is only 40 minutes away from Jining Daxing Airport and Beijing-Shanghai High-speed Railway Station, and only 10 minutes aw...
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