4084026820 Original Loader Bushing for ZW250-6

Part number 4084026820 is a genuine liner produced by Hitachi Construction Machinery in Japan. A support chain (rail link) system specifically designed for crawler excavators or bulldozers, serving as a wear-resistant lining for hinge points such as chain links, support wheels, or guide wheels. It is mainly suitable for Hitachi ZX series (such as ZX200, ZX330, etc.) track type equipment.

This product is an open type wear-resistant liner made of high-strength alloy steel precision machining. It is cylindrical in shape and made of alloy steel. The surface has undergone rust prevention treatment such as phosphating or galvanizing, with a silver gray metallic luster and good wear resistance and impact resistance. Its inner diameter, outer diameter, width, and opening size are all precision manufactured according to the matching requirements of the supporting chain pin shaft and the chain link plate hole. The opening design gives it a certain degree of elasticity, making it easy to install and disassemble, and can form a good fit with the pin shaft after being compressed.

Inspection cycle: Add lubricating grease to each lubrication point of the support chain every 250 working hours. Check the chain links for any abnormal looseness every 1000 working hours. If there is significant shaking, it may indicate wear of the lining. Replacement timing: When the wear of the inner hole of the liner exceeds the tolerance (usually radial clearance>0.5mm), severe scratches or deformations occur, the liner and the pin shaft must be replaced together.