Center Joint Seal Kit for Construction Machinery 703-07-23100 Excavator. Premium quality hydraulic seal repair kit for construction machinery from topsealkit, delivers reliable sealing performance, superior pressure resistance, and perfect OEM compatibility for Komatsu PC60-5 excavators. This aftermarket premium center joint seal kit is constructed with high-quality materials to withstand harsh working conditions, ensuring zero fluid leakage and minimal equipment downtime for construction, landscaping, and small-scale civil engineering projects.