YNF16838 Seal Kit 9257552 ZX330-1 Arm Cylinder Seal Kit with DU Bush Excavator Arm Repair Kit

The YNF16838 Arm Cylinder Seal Kit, replacing OEM 9257552, is engineered for the Hitachi ZX330-1 excavator arm cylinder. This upgraded package includes not only a complete hydraulic seal kit but also a DU bush, providing added structural reinforcement at the arm joint. Together, these components restore sealing integrity, improve arm movement stability, and reduce wear on the cylinder pin and housing.

The high-performance seals are made from premium PU, NBR, PTFE, and composite wear materials designed to withstand high pressure, heavy load cycles, and extreme jobsite conditions. The DU bush provides excellent load-bearing capability, ensuring smooth pivot movement and reduced metal-to-metal contact.

This combined seal kit and DU bushing set is preferred by excavator maintenance workshops, fleet operators, machinery rental companies, and aftermarket distributors. It offers a cost-effective solution for eliminating hydraulic leakage, stabilizing arm operation, and prolonging component lifespan.