0923602 Original Excavator Hydraulic Pump Liner Assembly Piston Rotor Assembly for ZX450 

Hitachi excavator original hydraulic pump cylinder liner assembly piston rotor assembly, universal part number 0923602, is the core maintenance component package of hydraulic main pump. This assembly is mainly suitable for medium and large excavators of Hitachi ZX series and EX series, with specific models including ZX200-3, ZX240-3, ZX330-3, EX200-3, EX300-3, etc. As a genuine original accessory, this part number ensures that the dimensional accuracy, material matching, and overall balance of all internal components (such as cylinder body, plunger, slide shoe, return plate, distribution plate, etc.) meet the factory standards. It is a key spare part for hydraulic pump overhaul or performance recovery, which can effectively ensure the overall performance and reliability of the pump after maintenance.
 

The assembly 0923602 is a complete hydraulic pump core motion pair repair kit designed specifically for inclined disc axial piston variable displacement pumps. It usually includes key components such as precision machined and paired cylinder body (pump bladder), plunger (piston), slide shoe, return disc, ball joint, etc. Its core function is to replace the worn rotating components inside the pump, restore the pump's volumetric efficiency and working pressure. All parts are made of high-strength alloy steel or wear-resistant copper alloy, which have undergone heat treatment and ultra precision machining, and have extremely high dimensional stability, wear resistance, and fatigue strength.
 

This assembly is a major overhaul component of the hydraulic pump, and strict maintenance procedures must be followed after installation. Firstly, installation must be carried out in a dust-free and clean environment, and all parts need to be lubricated with clean hydraulic oil before installation. After the assembly is installed, all hydraulic oil filters must be replaced and new hydraulic oil that meets the specifications must be added. After startup, no-load operation should be carried out to exhaust the air inside the system. It is recommended to check the cleanliness of the hydraulic oil during the initial operation (such as 50 hours) and replace the fine filter again. In daily maintenance, it is necessary to strictly ensure the cleanliness of hydraulic oil, regularly inspect the oil, and prevent pollutants from causing premature wear of the new assembly. If there is insufficient output pressure, decreased flow or abnormal noise in the hydraulic system, it should be checked in a timely manner.