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Rexroth A4CSG355 A4CSG500 Hydraulic Charging Pump
Green Hydraulic
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
Same as the main pump
1 set
Product Description
The Rexroth A4CSG355 / A4CSG500 Hydraulic Charge Pump is an integrated auxiliary pump designed for closed-loop hydrostatic transmission systems. It provides stable charge pressure, continuous oil replenishment, and reliable support for lubrication, cooling, and control circuits.
This charge pump is built into the A4CSG axial piston variable pump, ensuring compact design, high efficiency, and long-term reliability in heavy-duty applications.
Low Noise & High Efficiency：Optimized gear design ensures smooth operation, low noise, and high volumetric efficiency.
Improve Main Pump Stability：Provides stable charge oil flow to maintain proper lubrication and cooling of the main pump.
Extend Hydraulic System Service Life：Reliable charge oil supply reduces wear and helps extend the lifespan of the hydraulic system.
Multiple Control Options：Compatible with different hydraulic control systems to meet various application requirements.
The A4CSG355 / A4CSG500 Hydraulic Charge Pump Circuit refers to the hydraulic make-up (charge) oil supply circuit used in closed-loop hydrostatic transmission systems. It is designed to maintain stable charge pressure, replenish oil losses, and support cooling, lubrication, and control functions of the main axial piston pump.
Specifications
Type | Gear Pump |
Model | A4CSG355 / A4CSG500 Hydraulic Charging Pump |
Displacement（cm³） | Other |
Shaft Type | Same as the main pump |
Function | Completely interchangeable with original pump |
Material | Cast/Ductile iron, steel, bronze and others |
Processing technic | Cutting, lathe, machining center, heat treatment, grind, honing, burring and so on |
Applications
1. Construction Machinery
2. Road Construction Equipment
3. Agricultural Machinery
4. Forestry Equipment
5. Industrial Hydraulic Systems
6. Hydrostatic Drive Systems
7. Mining Equipment
8. Special Vehicles
Charge 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.
The charge pump supplies low-pressure oil to the closed-loop system, maintains charge pressure, compensates for internal leakage, and supports cooling and lubrication functions.
Yes, the A4CSG series features an integrated gear-type charge pump built into the main axial piston pump, reducing the need for external auxiliary pumps.
The charge pump is typically a gear-type hydraulic pump, known for its simple structure, stable performance, and reliable oil delivery.
The main difference is displacement. A4CSG500 has a larger displacement and provides higher flow capacity, making it suitable for larger hydraulic systems.
Charge pressure maintains positive pressure in the loop, prevents cavitation, ensures proper lubrication, and supports control functions.
Typical signs include low charge pressure, abnormal noise, overheating, reduced system efficiency, and unstable machine operation.
In most cases, the charge pump is integrated into the main pump, but it can be repaired or replaced depending on the design and maintenance requirements.
Regular maintenance includes using clean hydraulic oil, replacing filters, checking seals and internal components, maintaining proper oil level, and ensuring good cooling conditions.
Charge 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.
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.
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.
