OEM Komatsu Excavator Hydraulic Pump Parts HPV165 PC400-8 Cylinder Block Valve Plate | Tonkee®

Komatsu Excavator Hydraulic Pump, Parts HPV165 PC400-8 Cylinder Block Valve Plate | Tonkee®

The cylinder block and valve plate are integral components of the hydraulic pump.


The cylinder block is a key element responsible for converting mechanical power into hydraulic power, and it is typically made from high-strength materials to withstand the significant pressures and forces in the hydraulic system. In the case of the HPV165, the cylinder block is designed to specifically fit the PC400-8 excavator, ensuring optimal performance and compatibility.

The valve plate, on the other hand, is responsible for directing the flow of hydraulic fluid within the hydraulic pump. It has precise channels, ports, and passages that control the distribution of fluid, regulating the movement of the hydraulic pistons and ultimately the functionality of the excavator's various hydraulic systems. In the case of the HPV165, the valve plate is designed to meet the exact requirements of the PC400-8 model, ensuring a perfect fit and smooth operation.

These two components, the cylinder block and valve plate, must be precisely manufactured to meet the specifications of the hydraulic system and the excavator model to ensure efficient performance and longevity. To provide a more detailed understanding, here are some specific specifications of the HPV165 hydraulic pump parts:

Material Composition: The cylinder block and valve plate are typically made from high-quality materials such as forged steel or cast iron. These materials are chosen for their durability and resistance to wear and tear, as they must endure substantial pressure and friction within the hydraulic pump.

Tolerances and Measurements: Precision is of utmost importance in hydraulic components. The cylinder block and valve plate must adhere to strict tolerances and measurements to guarantee a proper fit and functioning. These parts are machined to exact dimensions, ensuring compatibility with the PC400-8 excavator model.

Surface Finish: The surfaces of both the cylinder block and valve plate are often precision machined to achieve a smooth finish.


This minimizes friction and wear, improving the efficiency and lifespan of the hydraulic pump.

Flow Control: The valve plate is designed with a specific pattern of ports and channels to regulate the flow of hydraulic fluid, optimizing the operation of the excavator's hydraulic systems. This design must align with the requirements of the PC400-8.

Sealing and Gaskets: Proper sealing and gasket materials are critical to prevent hydraulic fluid leaks and ensure the system's integrity. The HPV165 parts are designed to accommodate the necessary seals and gaskets, effectively preventing leakage.

Pressure Ratings: The hydraulic pump, including the cylinder block and valve plate, is designed to withstand and operate within specific pressure limits, which are in line with the demands of the PC400-8 excavator's hydraulic system.

Compatibility and Interchangeability: HPV165 hydraulic pump parts must be engineered to perfectly match the PC400-8 model to ensure they can be easily interchanged without the need for significant modifications or adjustments.
Komatsu Excavator Hydraulic Pump Parts HPV165 PC400-8 Cylinder Block Valve Plate | Tonkee®
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