9260885 Original Excavator Hydraulic Pump for ZX330-5A

The original hydraulic pump part number 9260885 is the core power component of the HIOS III hydraulic system for the Hitachi ZX330-5A large excavator. It is mainly suitable for ZX-5A series large models such as ZX330-5A, ZX350-5A, ZX360-5A, and may also be compatible with Hitachi excavators of similar tonnage such as ZX330-3 and ZX360-3. This pump belongs to the split type inclined shaft plunger pump, which is provided as a single pump assembly and is responsible for providing high-pressure hydraulic oil for the working device of the whole machine. When placing an order, the complete model and serial number of the equipment must be provided to ensure that its interface size, displacement, and control method are fully matched with the original hydraulic system.

This product is an original hydraulic pump assembly with a cast iron housing. Its internal core is the inclined shaft plunger pump structure, which adjusts the displacement by changing the angle between the cylinder body and the drive shaft, achieving precise control of flow and pressure. As original parts, its precision motion pairs such as plungers, port plates, and swing seats have been precision machined and paired to ensure volumetric efficiency, durability, and reliability under high pressure (usually working pressure exceeding 30MPa) and high load conditions. The pump is deeply integrated with the Hitachi HIOS III hydraulic system, and is optimized for fuel economy and operational performance in conjunction with the electronic control system.

Daily maintenance: It is recommended to check the cleanliness of the hydraulic oil (NAS level 9 or below) every 500 working hours and replace the return oil and pilot filter element; Monitor the pump body for any abnormal whistling or knocking sounds, which may be a sign of wear on the plunger or distribution plate. Fault diagnosis: If there is slow or weak movement of the whole machine or abnormal pump noise, it is necessary to check the output pressure and flow rate of the pump; If the internal wear of the pump is confirmed, it may be considered to replace the old with a new regeneration pump service to reduce costs. Replacement and installation: When disassembling, mark the oil pipe interface; After installation, it is necessary to exhaust the air and slowly test the machine.