0820415 Original Excavator Nine Hole Plate Retainer for Hitachi ZX470LC-6

The nine hole plate fixator (part number 0820415) is a key positioning and fastening component used to fix the nine hole plate (distribution plate) in the hydraulic pump of Hitachi ZX470LC-6 excavator. It is directly compatible with the ZX470LC-6 model and highly compatible with excavators of the ZX470LC-5A and ZX470-5A series. As a genuine original accessory, this fixture is a standard part for replacing damaged or lost fixtures in the repair market, ensuring precise positioning and reliable sealing of the nine hole plate inside the hydraulic pump, thereby ensuring the pump's volumetric efficiency and stable working pressure.

This fixture belongs to the internal structural components of hydraulic pumps, usually made of high-strength alloy steel (such as 45 steel or 40Cr) through precision stamping, bending, and machining, with a surface treated with rust prevention (such as blackening or galvanizing). Its structural design is a plate-shaped or frame type part with positioning protrusions, installation holes, and locking slots, used to press the nine hole plate onto the pump body or cylinder body plane, preventing its axial displacement and circumferential rotation. The key dimensions include installation hole spacing, positioning pin diameter, and flatness of the clamping surface (usually required to be ≤ 0.02 mm). The production process includes full dimensional inspection, hardness testing (HRC 28-35), and assembly compatibility verification to ensure its fatigue resistance and long-term reliability under high pressure (up to 35 MPa), high temperature (oil temperature ≤ 90 ℃), and high-frequency vibration conditions.

Key points for post maintenance and upkeep: 1 Regular inspection: Every 1000 working hours, during the maintenance of the hydraulic pump, check whether the fixing device is deformed, cracked, or corroded, whether the positioning protrusion is worn, and whether the locking groove is intact. 2. Cleaning and rust prevention: After disassembly, use cleaning agents to thoroughly remove surface oil stains and impurities. After inspection, apply a thin layer of rust proof grease before installation. 3. Installation specifications: During installation, it is necessary to ensure that the contact surface between the fastener and the nine hole plate and pump body is clean and free of burrs. The installation bolts should be tightened evenly in 2-3 diagonal steps to the specified torque (usually 20-40 N · m) to avoid one-sided force causing uneven wear of the nine hole plate.