Center Joint Seal Kit for Komatsu 703-09-33210 Excavator. Premium quality hydraulic seal repair kit for construction machinery from topsealkit, delivers excellent sealing performance, superior pressure resistance, and perfect OEM compatibility for Komatsu PC300-5 PC310-5 excavators. This aftermarket premium swivel center joint seal kit is constructed with high-quality materials to withstand harsh working conditions in construction, mining, and demolition sites, ensuring zero fluid leakage and extended equipment service life.