{"product_id":"1583026-ring-backup-fits-caterpillar-models","title":"1583026 Ring-Backup Fits Caterpillar Models","description":"\u003ch3\u003eOne New Aftermarket Replacement Backup Ring for Caterpillar (Cat) Construction Equipment\u003c\/h3\u003e\u003cp\u003eThis backup ring (also called a back-up ring or anti-extrusion ring) is used in high-pressure static and dynamic sealing applications within Caterpillar hydraulic systems, including hydraulic pumps, cylinders, and valves. It is designed to sit alongside an O-ring and prevent seal extrusion under pressure, protecting the integrity of the sealing system and extending the service life of the primary seal. Replaces Caterpillar (Cat) OEM part number 1583026 (also formatted as 158-3026).\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eBore Diameter: 165.1 mm\u003c\/li\u003e\n\u003cli\u003eApplication: High-pressure hydraulic sealing systems\u003c\/li\u003e\n\u003cli\u003ePart Type: Backup Ring (Back-Up Ring \/ Anti-Extrusion Ring)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatible Models\u003c\/h4\u003e\u003cp\u003eThis is a Caterpillar sealing component used across multiple Cat construction equipment platforms. Confirm fitment using your machine model and serial number before ordering, as this ring is used in various hydraulic assemblies across the Cat equipment lineup.\u003c\/p\u003e\u003ch4\u003eReplaces Part Number(s):\u003c\/h4\u003e\u003cp\u003e1583026, 158-3026\u003c\/p\u003e\u003cp\u003eNew aftermarket replacement part - not remanufactured, not used.\u003c\/p\u003e","brand":"Reliable Aftermarket Parts, Inc® -OD","offers":[{"title":"Default Title","offer_id":42453274525779,"sku":"1583026","price":42.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0079\/4060\/3955\/files\/RAP_ComingSoon_Tractor_3fdef5c4-9ec5-4f27-9b4d-979c5788a312.jpg?v=1757732193","url":"https:\/\/www.reliableaftermarketparts.com\/en-au\/products\/1583026-ring-backup-fits-caterpillar-models","provider":"Reliable Aftermarket Parts, Inc®","version":"1.0","type":"link"}