Center Joint Seal Kit for Komatsu 703-08-23111 Excavator. Premium quality hydraulic seal repair kit for construction machinery from topsealkit, delivers excellent sealing performance, exceptional durability, and perfect OEM compatibility for Komatsu PC30-7 PC40-7 excavators. Ideal for construction, mining, and civil engineering applications, this aftermarket premium seal kit meets or exceeds original equipment specifications to ensure zero fluid leakage and extended equipment service life.