K3V112DT Charge Pump
Green Hydraulic
Yes
ISO9001，CE
1. Industrial Hydraulic Systems 2. Mobile Equipment (Industrial Vehicles) 3. Construction and Engineering Machinery 4. Metallurgy Industry
spline shaft
1 set
Product Description
The K3V112DT Charge Pump functions as an important low-pressure oil supply unit in hydraulic systems. It is designed to provide the main pump with stable charge flow and charge pressure. The pump operates based on the principle of volumetric hydraulic transmission, where the meshing rotation of external gears changes the volume of sealed working chambers, enabling continuous suction and discharge of hydraulic oil.
The charge pump helps maintain favorable suction conditions for the main pump, supplies oil for system control circuits, and provides necessary lubrication and cooling for key internal components. When the main pump high-pressure circuit operates under long-term high-pressure and heavy-load conditions, the charge pump ensures a stable charge pressure supply, helping prevent cavitation and insufficient oil supply. This reduces wear and potential damage to critical components such as the pistons, bearings, and valve plate, ensuring stable and efficient operation of the entire hydraulic system, extending equipment service life, and reducing maintenance costs.
Integrated at the rear end of the K3V112DT main pump, coaxial drive eliminates the need for additional transmission components, which not only saves installation space but also improves transmission efficiency. The compact structure is perfectly adapted to the limited layout space of 20–25 ton class excavators, and the installation is convenient without complex assembly steps, reducing installation time and labor costs.
Adopting a fixed-displacement external gear pump structure, with simple working principle, mature technology and strong anti-interference ability. The built-in pilot relief valve can effectively limit the maximum output pressure, avoid damage to the hydraulic system due to overpressure, ensure stable output of pilot pressure and lubricating oil flow, and the failure rate is significantly lower than that of ordinary auxiliary pumps. It has the characteristics of durability, efficiency and easy maintenance, which can improve the productivity of equipment.
It undertakes three core functions of the hydraulic system: providing stable pilot control pressure (driving main pump regulator, multi-way valve, travel/rotary motor and other executive components), forced lubrication for internal parts of the main pump (bearings, slippers, valve plates), and replenishing oil leakage on the high-pressure side of the main pump to maintain circuit pressure and prevent cavitation. It is an indispensable core component for the normal operation of the K3V112DT main pump, and also helps to cool the hydraulic oil and reduce the temperature of the hydraulic system.
The pump casing is made of high-strength ductile iron, and the gear is treated with quenching process, which has excellent wear resistance and impact resistance. The high-pressure wear-resistant seal ensures no oil leakage, can withstand long-term heavy-load operation under harsh working conditions such as mines and construction sites, and significantly extends the service life of the pump body and the entire hydraulic system. The bearing life meets the K3V series standard, ensuring long-term stable operation.
It is fully compatible with the original K3V112DT main pump, with good interchangeability of accessories and replacement parts. The standardized interface design facilitates quick disassembly, assembly and replacement. Daily maintenance only needs to check the oil level, oil cleanliness and seal integrity, which is simple and efficient, reducing equipment downtime and maintenance costs. It can be quickly replaced when a fault occurs, ensuring the continuous operation of the equipment.
| Type | Model | displacement（cm3） | Shaft Type |
| Gear Pump | K3V112DT | other | Spline Shaft |
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.
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.
Charge Pump FAQ
A: No, it is integrated with the main pump and does not require separate installation. When replacing, ensure that the spline shaft is accurately aligned with the main pump drive shaft, tighten the fixing screws with a torque wrench, keep the contact surface flat and free of impurities, and use a seal ring of the correct size to ensure sealing performance.
A: Manually fill the charge pump with clean hydraulic oil through the drain port to empty the internal air and avoid dry running damage. Jog start several times to confirm that the rotation direction is clockwise (when viewed from the shaft end), and there is no abnormal sound or oil leakage before formal operation. In addition, manually turn the main shaft to check the self-priming condition of the charge pump.
A: The cleanliness of hydraulic oil must meet the ISO 18/15 standard, and the oil temperature should be kept between 15–65℃. It is recommended to regularly replace hydraulic oil and filters; under harsh working conditions such as mines and high dust, the replacement cycle should be shortened to avoid component wear caused by oil pollution.
A: No, it cannot be reversed; its rotation direction is the same as that of the main pump. Reverse rotation will cause no oil delivery, system pressure loss, internal gear wear, and even damage to the pump body and the main pump. When installing, pay attention to the chamfer direction of the gear rotor to avoid reverse installation.
A: It is a dedicated charge pump for the main pump and cannot be used universally with other models. The main pump cannot work normally without it, which will cause serious damage to the internal components of the main pump and affect the service life of the entire hydraulic system.
A: No, it cannot. The standard displacement is 12 cm³/rev; replacing it with other displacements (10/14 cm³/rev) without authorization will lead to insufficient or too high pilot pressure, abnormal lubrication flow, and early wear of the main pump. The displacement should be selected according to the actual working conditions of the equipment.
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.
We are a manufacture for vane pumps。.We are located in Changzhou City, Jiangsu Province, China.Welcome to visit us.
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.
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.
