This OTTO thermal valve sealing ring kit (part number 1-21779001-0) is designed for excavators including Komatsu ZX450-3, PC450, and PC490. It provides reliable, high-temperature sealing for valve systems, ensuring optimal thermal performance and preventing leaks under demanding engine conditions.

This OTTO hydraulic seal ring/O-ring set (part number 1-13779011-0) is designed for excavators including Hitachi ZX450-3, PC450, and PC490. It provides a reliable, leak-proof seal for hydraulic connections, ensuring consistent system performance and protection against fluid loss or contamination.