Original Excavator Pin 3075265 for Hitachi ZX800

This high-strength heavy-duty working device is equipped with an Excavator Pin, with Hitachi original core part number 3075265. This ultra-high load physical load-bearing unit serves as the absolute core skeleton for the key hinge points of the boom, arm, or bucket, specifically designed for deep matching of Hitachi's large mining grade hydraulic excavators. It is precisely suitable for the Hitachi ZX800, ZX850H, ZX870H-5G and other 80 ton class super powerful star models on the same platform. The product is based on first principles and is made of high-quality alloy structural steel (such as 40Cr or 42CrMo) that has undergone multiple extreme heat treatments and surface high-frequency quenching depths. It has a highly ductile physical matrix inside and an ultra high hardness wear-resistant layer on the outside, perfectly resisting the intense alternating shear stress and ultimate impact load of mines. The physical dimensions of the product packaging are approximately 520mm × φ 110mm (specific specifications can be adjusted according to the hinge position), and the overall net weight of a single unit is approximately 38.5kg.

"Extreme cleaning and lining matching (core pit avoidance): Before assembly, the old lining must be removed using a special puller, and the carbon and rust deposits in the seat hole must be thoroughly scraped off. After installing the new liner, it is necessary to ensure that the seat hole is absolutely aligned with the physical axis of the new pin shaft. If there is micrometer level deviation or residual hard foreign objects in the hole of the liner, forced insertion will cause local stress concentration and trigger sudden physical fracture in the later stage.

Thermodynamics assisted and cold shrink assembly: It is strictly prohibited to use a large hammer to directly counteract blind hard impact on the end face of the pin shaft. It is recommended to use dry ice for physical cold shrinkage treatment of the pin shaft or moderate thermodynamic transition for the seat hole. Before assembly, apply a layer of high-pressure grease evenly on the surface of the pin shaft and bushing to ensure smooth and unobstructed sliding into the designated physical position.