{"product_id":"caterpillar-5j-8300-u-cup-rod-seal","title":"Caterpillar 5J-8300 U-Cup Rod Seal","description":"\u003cdiv\u003e\u003cp\u003eCaterpillar 5J-8300 U-Cup Rod Seal is a urethane U‑cup seal used to seal hydraulic cylinder rods in Cat equipment, serving as the primary rod sealing element in Caterpillar cylinder assemblies. The part number is 5J-8300 and it is molded in URE material, categorized as a U‑cup rod seal. Dimensions listed for this part are A = 0.41 in (10.49 mm) and B = 3.50 in (88.95 mm). As a Caterpillar replacement component, it is designed to fit the original packing profile and help prevent hydraulic fluid leakage as the rod moves within the cylinder. The U‑cup design provides a simple, robust sealing solution suited to the hydraulic systems used in heavy equipment, with material and geometry chosen to resist wear and provide reliable sealing across demanding operating conditions.\u003c\/p\u003e\u003c\/div\u003e","brand":"Caterpillar","offers":[{"title":"New Surplus No Box","offer_id":51677847355694,"sku":null,"price":36.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0818\/1038\/files\/Ebay_website_image_f0f4c7e2-8279-44ce-9c1b-b09d28f35b89.jpg?v=1769568339","url":"https:\/\/plgautomation.com\/products\/caterpillar-5j-8300-u-cup-rod-seal","provider":"PLG Automation ","version":"1.0","type":"link"}