0939523 Original Excavator Parts Bucket Cyl Nut for EX8000

Hitachi original excavator bucket cylindrical nut (part number: 0939523) is a key fastener used in the working device of Hitachi excavators to fix the bucket pin, connecting pin, or the connection part between the bucket and the connecting rod or rocker arm. As an original standard component, it is widely compatible with multiple Hitachi excavator models, including the ZX series (such as ZX60, ZX70, ZX130, ZX200, ZX220, ZX240, ZX330, etc.) and the EX series (such as EX60, EX100, EX120, EX200, EX300, etc.).

The cylindrical nut of the bucket is the "safety guard" of the connection point of the working device. Its core function is to cooperate with the bucket pin or bolt to reliably lock the bucket, connecting rod, rocker arm and other components together, withstand the huge impact load, shear force and vibration during excavation operations, prevent connection loosening and detachment, and ensure the structural integrity and operational safety of the working device. As an original component, it strictly follows Hitachi's quality standards and is usually made of high-strength alloy steel (such as 40Cr, 42CrMo) through quenching and tempering heat treatment. It has high hardness and good toughness, with thread accuracy reaching 6g or 6H level, ensuring a tight fit and anti loosening performance with the pin shaft thread.

The maintenance core of the bucket cylindrical nut lies in regularly checking its fastening status and integrity to prevent pin shaft movement, increased wear, and even connection failure caused by looseness. Daily inspection: It is recommended to use a torque wrench every 250 working hours or every week to check whether the tightening torque of all bucket connection nuts has reached the specified value (usually hundreds to thousands of Newton meters), and visually inspect the nuts for cracks, deformation, rust, and whether the anti loosening devices (such as locking plates and split pins) are intact. Key inspection: After the equipment is subjected to heavy load operations (such as crushing and mining conditions), or every 1000 hours of operation, a comprehensive re tightening inspection should be conducted on all bucket connection nuts.