Kobelco YY01V00003R300 Arm Cylinder Seal Kit

The YY01V00003R300 is a hydraulic cylinder seal kit designed for arm cylinder repair on Kobelco and New Holland compact excavators. The kit contains all necessary seals, O-rings, wear bands, and buffer rings to restore rod and piston sealing performance. Engineered for high-pressure hydraulic service, the kit components are manufactured from durable polyurethane (PU) and nitrile rubber (NBR) materials. The kit matches OEM specifications for rod diameter 80.00 mm and bore diameter 115.00 mm. It serves as a direct replacement for Kobelco part number YY01V00003R300 and cross-references multiple aftermarket and OEM part numbers across Kobelco and New Holland equipment lines.