Hitachi excavator parts EX1200-6 ZX850-3 ZX650-3 hydraulic main pump 4635645 K3V280

We could supply the hydraulic pump and also the inner spare parts as below model:

Closed-Circuit Pump (Axial Piston - Variable Displacement):
Specifically designed for hydrostatic transmissions driving travel motors or sometimes swing motors in excavators, the closed-circuit pump operates fundamentally differently from open-circuit pumps. Its principle involves two integrated variable displacement axial piston units (pump and motor) or one pump unit connected directly to a hydraulic motor via two main lines (A & B). Fluid circulates in a closed loop between the pump and motor. The pump's direction of flow (determining motor rotation direction) is controlled by tilting the swashplate over center (positive or negative angle). Displacement controls motor speed. A small, fixed displacement charge pump (usually a gear pump) is essential. It replenishes minor leakage in the closed loop, provides cooling flow through a flushing valve, and supplies pressurized fluid to the pump's servo control for swashplate movement. Structurally, the main pump section resembles a standard axial piston pump but has two main ports (A & B) instead of dedicated inlet/outlet. It incorporates check valves for charge pressure replenishment and often a flushing valve assembly.

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.