4651286 Original Excavator Spare Parts Holder for Hitachi ZX120-3

The original bracket 4651286 is a specialized structural component for the Hitachi ZX120-3 (12 ton class) excavator, and the universal number is its part number. The overall working weight of this model is approximately 12200kg, equipped with an Isuzu 4BG1TC engine (rated power 66kW) and a bucket capacity of 0.52m ³. The bracket is usually used to fix key components such as engines, hydraulic pumps, driver's cab, or working devices. Its installation hole position, angle, and strength design are fully matched with the frame structure of ZX120-3, ensuring stability under dynamic loads such as excavation and rotation.

This product is made of high-strength steel plate (commonly Q345 or similar materials) that is laser cut, bent, and welded into shape, and the surface is treated with rust prevention (such as galvanizing or spraying). Structurally, reinforcement ribs and flanges are often designed to enhance torsional and bending resistance. The installation surface usually reserves standard bolt holes and may come with rubber buffers or bushings for vibration reduction and noise reduction. As a load-bearing component, its mechanical properties have undergone original finite element analysis (FEA) and bench testing, and it can withstand the impact and vibration of ZX120-3 under harsh working conditions. It is an important component in ensuring the structural integrity of the entire machine.

Before installation, clean the contact surface, check if the bolt holes are intact, and tighten them with bolts of the specified torque to avoid deformation or breakage of the bracket due to looseness. Regularly inspect the bracket for cracks, rust, or deformation, especially after heavy load operations. If weld cracking or hole wear is found, the original 4651286 bracket should be replaced immediately. Welding repair or the use of non-standard parts as substitutes is strictly prohibited. At the same time, pay attention to checking the suspension status of the connected components (such as the engine and hydraulic pump) to ensure even load distribution. Keeping the surface of the bracket clean and promptly removing soil and corrosive substances can extend its service life.