Center Joint Seal Kit for Construction Machinery 703-09-33260 Excavator. Premium quality hydraulic seal repair kit for construction machinery from topsealkit, delivers reliable sealing performance, superior durability, and perfect OEM compatibility for Komatsu PC340-6 PC350-6 excavators. This aftermarket premium center joint seal kit is constructed with high-quality materials to withstand harsh working conditions in construction, mining, and civil engineering sites, ensuring zero fluid leakage and extended equipment service life.