Hitachi excavator parts K5V80DTP-YXSKR-9K00 main pump ZX160W 9227147 hydraulic pump

This is not a distinct pump type per se, but a critical control refinement applied predominantly to axial piston swashplate pumps, making them essential for efficient excavator operation. The core pump structure remains as described in the first point. The key addition is a sophisticated pressure-compensating control mechanism integrated into the swashplate angle adjustment system. This mechanism constantly monitors the outlet pressure of the pump. Its principle dictates that when the system pressure reaches a pre-set maximum (the compensator setting), the control mechanism automatically reduces the swashplate angle, thereby decreasing pump displacement (flow output). This prevents pressure from rising further, protecting the system from overload. Structurally, this involves a hydraulic compensator valve (often pilot-operated), pressure sensing lines, and the linkage connecting it to the swashplate servo piston. When downstream pressure is below the compensator setting (e.g., during digging when the cylinder is moving), the pump delivers maximum commanded flow. As resistance increases and pressure approaches the set limit (e.g., when the bucket hits an immovable object or reaches the end of its stroke), the compensator valve shifts, directing pilot pressure to the servo piston to destroke the pump, holding pressure constant while flow drops to only what's needed to compensate for internal leakage.

GZ Yuexiang Engineering Machinery Co., Ltd.

GZ Yuexiang Engineering Machinery Co., Ltd, is a foreign trade company integrating development, sales, procurement, warehousing, transportation and service. Founded in September 2013, we have more than twelve years of experience in machinery trade.

Our main products are Excavator Hydraulic Spare Parts, Hydraulic Main Pump, Swing Motor, Travel Motor, Final Drive Ass'y, Swing Device Ass'y, Swing Gearbox, Travel Gearbox, Gears, Regulators, Relief Valve, Fan Motor and other hydraulic items with genuine and aftermarket quality. Until now, our products have been exported to more than 198 countries and regions, spreading all over the Middle East, Southeast Asia, Africa, North America, South America, Europe and Oceania with our own brand "Belparts", which is highly praised by foreign customers and enjoys a high reputation.

In the future, to practice our company culture “DO BETTER FOR TOMORROW ”, we will strive to learn more professional knowledge about machinery parts and increase our procurement and sales experience to provide customers with better products and services! What’s more, we will devote to develop a more broad business space together base on long-term, friendly, mutually beneficial and win-win business relations.