{"product_id":"caterpillar-3s-9643-rotating-shaft-lip-type-seal","title":"Caterpillar 3S-9643 Rotating Shaft Lip Type Seal","description":"\u003cdiv\u003e\u003cp\u003eCAT 3S-9643 Rotating Shaft Lip Type Seal is an authentic Caterpillar OEM seal designed for rotating-shaft service. This lip-type seal is built to retain lubricant inside the housing while protecting the machinery from external contaminants in rotating assemblies such as hydraulic or powertrain components. The part is specified with an outer diameter of 2.661 inches and a shaft diameter of 2.272 inches, enabling a precise fit for CAT equipment and other systems that use those dimensions. As a rotating shaft lip seal, it creates a tight contact with the shaft to minimize leakage at operating speeds, supporting reliable lubrication of internal components. The Cat Parts Store identifies 3S-9643 specifically as a Rotating Shaft Lip Type Seal, and third-party catalogs corroborate the same model and dimensions, helping technicians verify compatibility when replacing a CAT seal. For proper installation and sealing performance, verify the shaft diameter and bore in your machine’s service documentation and match them to the 2.272-inch shaft diameter and 2.661-inch outer diameter of this seal. When you choose this CAT seal, you’re selecting an OEM component designed to restore sealing integrity on rotating shafts where precise lip contact and durable materials are required, delivering consistent oil retention and contamination resistance in demanding operating conditions.\u003c\/p\u003e\u003c\/div\u003e","brand":"Caterpillar","offers":[{"title":"New Surplus No Box","offer_id":51677858038062,"sku":null,"price":290.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_e3427e53-c1d3-4cc0-b202-9604344ca415.jpg?v=1769568544","url":"https:\/\/plgautomation.com\/products\/caterpillar-3s-9643-rotating-shaft-lip-type-seal","provider":"PLG Automation ","version":"1.0","type":"link"}