YD00000642 Original Excavator Bucket Shaft Pin Shaft for ZX33U-6

The part number YD000000642 is the original bucket shaft pin provided by Hitachi for the ZX33U-6 series ultra small hydraulic excavator (with a total working weight of approximately 3.3 tons). This component is the core joint that connects the bucket and the boom, enabling flexible rotation of the bucket. Its universal models usually cover ultra small models on platforms such as ZX26U-6, ZX35U-6, and ZX50U-6. As a key structural connector of the original factory, its diameter, length, heat treatment process are precisely matched with the installation holes of the bucket and connecting rod. It is strictly prohibited to use non-standard auxiliary components to avoid loose connection points, abnormal wear, or operational risks.

This product is a high-strength alloy steel integrated pin shaft, with a structure identical to the picture you provided: the main body is an optical axis cylinder, with one end machined with a guide cone surface and a radial fixing hole, and the other end is a standard shaft shoulder with the same hole. The middle is covered with a black nylon or rubber dust/buffer sleeve. Typical technical parameters: diameter of about 30-40mm, length of about 200-300mm, surface treated with quenching and tempering heat treatment (hardness HRC28-35) and galvanized anti rust treatment, presenting a silver gray metallic luster. Its conical design is easy to install and align, with double fixing holes for installing spring pins or bolts to prevent axial movement. The middle kit can effectively prevent dust and reduce impact and abnormal noise with the copper sleeve. Capable of withstanding the enormous shear force and alternating load during bucket excavation.

Inspection cycle: Every 250 working hours, check the pin shaft for bending, cracks, abnormal wear (measure the diameter with a caliper, replace if the wear is greater than 0.5mm), and whether the dust cover is damaged. Installation points: 1 Thoroughly clean the pin installation holes of the bucket and connecting rod; 2. Apply sufficient lithium based grease on the surface of the pin shaft and inside the dust cover; 3. Use a cone end guide and a copper rod or specialized tool to smoothly knock the pin shaft into place. It is strictly prohibited to directly and violently hammer the optical axis; 4. Align the fixed holes at both ends and install new spring pins or locking bolts. Lubrication and maintenance: Add lubricating grease through the grease fitting on the bucket every 10 working hours until the old grease is squeezed out from the edge of the dust cover.