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90r42 90r55 90r75 90r100 90r130 Hydraulic Charge Pump
Green Hydraulic
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
Same as the main pump
1 set
Product Description
The 90R Series Hydraulic Charge Pump (including models 90R42, 90R55, 90R75, 90R100, and 90R130) is a high-efficiency auxiliary pump designed for closed-loop hydrostatic transmission systems. It provides stable charge pressure and continuous oil replenishment to ensure optimal performance of the main piston pump.
Engineered for durability and reliability, this series is widely used in heavy-duty mobile equipment and industrial hydraulic systems.
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.
A hydraulic gear charge pump is a crucial auxiliary component in closed-loop hydraulic systems. It is specifically designed to supply low-pressure oil to the main pump, ensuring proper system pressure, lubrication, cooling, and overall operational stability. Due to its simple structure and high reliability, the gear-type charge pump is widely used in mobile machinery and industrial equipment.
A hydraulic gear charge pump is a type of positive displacement pump that uses meshing gears to transfer hydraulic fluid. It typically works alongside a main piston pump in hydrostatic transmission systems, providing continuous oil replenishment and maintaining the required charge pressure.
Specifications
Type | Gear Pump |
Model | 90R42, 90R55, 90R75, 90R100, 90R130 Hydraulic Charge 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
Hydraulic drives with high pressure, heavy load, variability, large displacement, long service life, and reliability.
Steel metallurgy and forging machinery
Ceramic and refractory material presses
Shipping and hydroelectric systems
Rubber vulcanization and paper production
Petroleum equipment
Construction and mobile machinery
Railway and tunneling machines
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 90R series hydraulic charge pump provides low-pressure oil to the closed-loop system, maintains charge pressure, and compensates for internal leakage to ensure stable operation of the main pump.
These models are commonly used in excavators, wheel loaders, road rollers, agricultural machinery, and other hydrostatic drive equipment.
The main difference lies in displacement and flow capacity. Higher model numbers generally indicate larger displacement and higher oil flow output.
The 90R series charge pump is typically a gear-type pump, known for its durability, simple design, and stable performance.
Charge pressure ensures proper oil circulation, prevents cavitation, and protects the main piston pump from damage.
Signs include low system pressure, unusual noise, overheating, slow response, and reduced machine efficiency.
Yes, high-quality aftermarket replacements are available, provided they match the original specifications such as size, pressure rating, and mounting dimensions.
Regular maintenance includes using clean hydraulic oil, replacing filters, checking seals and gears, and ensuring proper oil levels and system temperature.
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.
