Hitachi ZX330/ZX350 Series High-performance seal kit engineered for Hitachi excavator swing mechanisms (ZX330-5G, ZX330LC-5G, ZX350H-5G, ZX350LCH-5G). Precision-manufactured components prevent hydraulic leakage and extend equipment uptime in demanding construction and earthmoving applications. Direct OEM compatibility ensures reliable performance under continuous rotational stress. Complete kit includes all seals required for swing-device assembly, reducing downtime and maintenance costs on your fleet.