9218005 Original Excavator pilot Gear Pump for ZX200-5G

The ZX200-5G original pilot gear pump (part number: 9218005) is designed specifically for the Hitachi ZX200-5G medium-sized hydraulic excavator and is one of the core components of the hydraulic system of this model. This pump is also widely applicable to excavators of the same series or similar models from Hitachi Construction Machinery, such as EX120-3, ZX200-5 and other models. As an original accessory, its part number 9218005 is a universal identification code, ensuring perfect matching and performance compatibility with the main hydraulic system.
 

The pilot gear pump is an important component of the hydraulic system of the Hitachi ZX200-5G excavator, which, together with two variable axial piston pumps, forms the main pump assembly and is responsible for providing stable oil pressure for the pilot control system of the equipment. Its key performance parameters include: the rated pressure of the pilot oil circuit is 3.9 megapascals (MPa), and the maximum flow rate can reach 33.6 liters per minute (L/min). As a gear pump, its compact structure and reliable operation ensure the sensitivity and smoothness of excavator pilot operations (such as joystick control), directly affecting the overall work efficiency and operating feel of the machine. The original pump meets the strict standards of Hitachi Construction Machinery in terms of materials, processing accuracy, and durability.
 

Hydraulic oil should be kept clean in daily life, and the oil suction filter should be checked and replaced regularly to prevent impurities from entering the pump and causing wear. It is recommended to check the clearance between the gear end face and the side plate every 500 hours of operation, and to check and replace the shaft end seal (shaft seal) every 2000 hours. During operation, it is necessary to monitor the system pressure, strictly prohibit exceeding the rated value, and pay attention to the pump body temperature and operating sound. If there is abnormal noise or overheating, the machine should be stopped immediately for inspection. When shutting down for a long time, it is recommended to drain the old oil from the pump and inject rust proof oil for protection. When there is a decrease in flow rate, insufficient pressure, or leakage, it should be dismantled and inspected in a timely manner, with a focus on checking the wear of gears, bearings, and seals, and replacing damaged parts according to the original factory specifications.