K3V K4V K5V K4V45 NVK45 Series K4V45C264R-R2652C Excavator Hydraulic High Pressure Piston Pump and Parts

1. Technical parameters:
Displacement: 45cm³.
Rated pressure: 31.4MPa (320kgf/cm²).
Maximum pressure: 34.3MPa (350kgf/cm²).
Rated speed: 2900min⁻¹.
Maximum rotational speed: 3600min⁻¹.2. Working Principle:
The K4V45C264R-R2652C belongs to the swashplate type axial piston pump. When the drive shaft rotates the pump body, the plunger moves back and forth under the push of the swash plate. When the plunger moves outward, the volume of the working chamber in the cylinder increases, creating a negative pressure, and the hydraulic oil is drawn into the pump through the suction pipe. When the plunger moves inward, the volume of the working chamber decreases, and the hydraulic oil is compressed and discharged through the oil discharge pipe, thereby converting mechanical energy into hydraulic energy. The oil distribution plate is used to control the inflow and outflow of hydraulic oil, ensuring the smooth progress of the oil suction and pressure processes.

3. Product Features and Advantages:
High efficiency: It can achieve high-efficiency operation under high pressure, low pressure and low flow conditions.
Structural stability: The mechanical median holding mechanism with spring return is adopted, which can meet the requirements of hydrostatic transmission (HST) in the median position and ensure the stability of the system.

4. Usage functions and purposes:
As the power source of the excavator’s hydraulic system, it provides hydraulic energy for each working component of the excavator, driving the hydraulic cylinder and hydraulic motor to achieve actions such as digging, lifting, rotating and unloading.

5. Applicable machines and scenarios:
It is suitable for excavators of brands such as Kobelco, Sany, and Sumitomo (-5 series), and is widely used in scenarios requiring excavation operations such as construction projects, mining, and earthwork.

6. Similar models:
Other models in Kawasaki’s K4V series, such as K4V112C, share certain similarities in structure and working principle, but differ in parameters like displacement and pressure.

7. Precautions for Use
In terms of start-up: Before starting, it is necessary to jog several times to check if the oil flow direction and sound are normal. After running under low pressure for 5 to 10 minutes, it can be put into normal operation. Before starting the plunger pump, clean working oil must be filled into the pump through the oil drain port on the casing.
In terms of oil: Use clean and qualified hydraulic oil. Avoid mixing hydraulic oil of different brands or different grades of the same brand. Regularly replace the hydraulic oil and filters to maintain the cleanliness and good fluidity of the oil.
In terms of operating parameters: Avoid long-term operation at the highest pressure and highest speed. Pay attention to the working oil temperature of the hydraulic pump. The normal working oil temperature is 15-65℃.
Installation aspect: Ensure the coaxiality of the pump and the prime mover. The installation of the suction pipe and the return pipe should meet the requirements, such as the suction pipe should be as short, straight, large and thick as possible, and the outlet of the return pipe should be lower than the oil surface, etc.