Turning Joint Seal Kit for Construction Machinery R140W-7 R170W-7. Premium quality hydraulic seal repair kit for construction machinery from topsealkit, delivers reliable sealing performance, superior wear resistance, and precise fit for R140W-7 R170W-7 construction equipment. This OEM equivalent aftermarket seal kit (Part No: 31N4-40950) is engineered to withstand extreme working conditions in construction, mining, and demolition sites, ensuring minimal downtime and reduced maintenance costs.