- This seal kit is designed specifically for Hitachi EX400, EX400LC, EX400H, and EX4001 boom bucket cylinders. - Provides a complete sealing solution to restore and maintain proper hydraulic function in these Hitachi models. - High-quality seals are engineered to withstand harsh working conditions and prevent leaks. - Replacing worn or damaged seals with this kit helps preserve hydraulic performance and extend cylinder life. - Compatible across multiple EX400 series models, offering a reliable replacement option for worn-out cylinder seals. - Use scenario 1: During cylinder service on a Hitachi EX400 series machine, install the kit to restore sealing integrity and reduce leaks. - Use scenario 2: In demanding digging or lifting operations where hydraulic pressure is high, use the kit to prevent leaks and improve uptime. - Use scenario 3: As part of preventive maintenance for aging equipment to avoid unexpected seal failure and preserve cylinder efficiency.