When it comes to sourcing genuine and OEM-quality components, our selection is unmatched. We provide hydraulic cylinders for an extensive list of leading brands, ensuring that you can find the perfect fit for your machine. Our offerings include parts for Cat, Komatsu, Volvo, Hyundai, Hitachi, Kobelco, and more. Whether you need a Komatsu PC200-8 hydraulic arm cylinder or a Volvo Ec460b excavator boom cylinder, we have the precise part you need, with the assurance of quality. Our expertise in import and export trade allows us to provide these parts at competitive prices, helping you save on repair and maintenance costs.

Essential Component Terminology

Boom Cylinder (缸臂气缸 / Цилиндр стрелы): A hydraulic cylinder that lifts and lowers the excavator's boom. Located at the base of the boom, it is crucial for main lifting operations. Example: Caterpillar 345D boom cylinder.

Arm Cylinder (斗杆气缸 / Цилиндр рукояти): Also known as the stick cylinder, this hydraulic cylinder controls the extension and retraction of the excavator's arm. It is located between the boom and the arm. Example: Komatsu PC200-8 arm cylinder.

Bucket Cylinder (挖斗气缸 / Цилиндр ковша): This cylinder controls the movement of the bucket, enabling it to curl and dump material. It is connected to the end of the arm. Example: Hyundai R210LC-7 bucket cylinder.

Hydraulic Pump (液压泵 / Гидравлический насос): The heart of the hydraulic system, it converts mechanical power into hydraulic energy by pressurizing fluid. It is typically found near the engine. Example: JCB JS240 hydraulic main pump.

Hydraulic Control Valve (液压控制阀 / Гидравлический распределитель): A component that directs the flow of pressurized hydraulic fluid to various parts of the machine, such as the cylinders and motors. It is located between the pump and the actuators. Example: Volvo EC210B hydraulic control valve.

Slewing Motor (回转马达 / Поворотный двигатель): A hydraulic motor that provides the power for the excavator's upper structure to rotate. It is located in the machine's superstructure. Example: Kubota U30 swing motor.

Final Drive (终传动 / Бортовой редуктор): A combination of a hydraulic motor and a gearbox that converts hydraulic energy into torque to propel the tracks. It is located on the track frames. Example: Yanmar Vio25 final drive travel motor.

Seal Kit (油封套件 / Комплект уплотнений): A collection of seals and gaskets used to prevent fluid leaks in components like hydraulic cylinders. These are crucial for maintaining system pressure and preventing fluid contamination. Example: Cat 428D cylinder seal kit.

Piston Rod (活塞杆 / Поршневой шток): A key part of the hydraulic cylinder, it extends and retracts to transmit force. It is the visible, chromed shaft of the cylinder. Example: Hitachi ZX200-3 piston rod.

Hydraulic Fan Motor (液压风扇马达 / Гидравлический вентиляторный двигатель): A hydraulic motor used to drive the cooling fan, which helps to maintain the engine's operating temperature. Example: Cat E345 hydraulic fan motor.