{"product_id":"caterpillar-5j-4988-seal","title":"Caterpillar 5J-4988 Seal","description":"\u003cdiv\u003e\u003cp\u003eCaterpillar 5J-4988 Seal is a two-piece PTFE hydraulic piston seal assembly designed for Cat cylinders with a 5.500 inch bore. Cataloged as 5J-4988 and cross-referenced as CTC-5J4988, this seal kit pairs a PTFE piston seal with its companion components to restore pressure containment and minimize leakage in the cylinder bore. The PTFE material provides low friction during piston movement and resistance to common hydraulic fluids used in Cat machines, helping reduce wear and extend seal life in demanding operating conditions. This part is intended as a replacement seal assembly for Caterpillar hydraulic pistons, suitable for use in systems that require a 5.5-inch bore and a two-piece piston seal configuration. Typical applications include Cat hydraulic systems on heavy equipment and construction machines where piston seals endure high pressures and frequent cycling. The 5J-4988 seal is commonly sourced through Cat-authorized distributors and reputable aftermarket suppliers under the same part number or cross-references, enabling straightforward replacement to maintain cylinder performance.\u003c\/p\u003e\u003c\/div\u003e","brand":"Caterpillar","offers":[{"title":"New Surplus No Box","offer_id":51677847552302,"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_dbac6dc6-f40a-42b3-8fef-15a814632f6b.jpg?v=1769568343","url":"https:\/\/plgautomation.com\/products\/caterpillar-5j-4988-seal","provider":"PLG Automation ","version":"1.0","type":"link"}