{"product_id":"1400184-seal-back-fits-caterpillar-models","title":"1400184 Seal-Back Fits Caterpillar Models","description":"\u003ch3\u003eOne New Aftermarket Replacement Hydraulic Cylinder Backup Ring for Caterpillar (Cat) Equipment\u003c\/h3\u003e\u003cp\u003eThis backup ring (also called a back-up ring or seal-back) is used in Caterpillar hydraulic cylinder assemblies to prevent seal extrusion under high-pressure operating conditions. Installed alongside primary O-rings or hydraulic seals, it supports the sealing element and extends the service life of the cylinder seal by bridging the extrusion gap between moving and stationary components.\u003c\/p\u003e\u003ch4\u003eCompatible Models\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eCaterpillar (Cat):\u003c\/strong\u003e Verify compatibility by confirming part number 1400184 against your machine's parts manual or serial number before ordering.\u003c\/p\u003e\u003ch4\u003eReplaces Part Number(s):\u003c\/h4\u003e\u003cp\u003e1400184\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":42453423456339,"sku":"1400184","price":28.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0079\/4060\/3955\/files\/1400184_01.jpg?v=1757708957","url":"https:\/\/www.reliableaftermarketparts.com\/products\/1400184-seal-back-fits-caterpillar-models","provider":"Reliable Aftermarket Parts, Inc®","version":"1.0","type":"link"}