Belparts excavator SK330-8 SK350-8 main pump assembly K5V140DTP-NOSER-YTOKHV for kobelco

External Gear Pump:
A fundamental and robust design frequently employed in excavators for lower-pressure auxiliary circuits, pilot control systems, and charge pumps for closed-loop systems. Its operating principle is elegantly simple: two identical gears, one driven (usually by the engine) and one idler, mesh tightly within a precisely machined housing cavity. As the gears rotate, teeth unmesh on the inlet side, creating expanding volume cavities that draw fluid in. The fluid is trapped between the gear teeth and the pump housing as the gears rotate. This trapped fluid is carried around the periphery of the housing to the outlet side. On the outlet side, the meshing of the gear teeth reduces the volume between them, forcibly ejecting the fluid under pressure. Key structural elements include the driving and driven shafts, the gear pair (often hardened steel), the pump housing with precisely machined side plates (wear plates) to minimize axial leakage, and inlet/outlet ports. While primarily fixed displacement, flow can be varied by changing the pump's drive speed. External gear pumps are prized for their simplicity, compactness, low cost, reliability, tolerance to contamination compared to piston pumps, and good performance at medium pressures.

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.