{"product_id":"1u1738-ring-backup-fits-caterpillar-models","title":"1U1738 Ring-Backup Fits Caterpillar Models","description":"\u003ch3\u003eOne New Aftermarket Replacement Backup Ring for Caterpillar (Cat) Equipment\u003c\/h3\u003e\u003cp\u003eThis backup ring (part number 1U-1738) is a urethane rubber hydraulic sealing component used in Caterpillar cylinder assemblies. It features a 174.25mm (approximately 6.86 in) internal diameter and a 182.85mm outer diameter, and is installed alongside an O-ring to prevent seal extrusion under high-pressure hydraulic conditions. Backup rings are used in static and dynamic sealing applications including hydraulic cylinders, pumps, and valve systems.\u003c\/p\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eInternal Diameter: 174.25mm\u003c\/li\u003e\n\u003cli\u003eOuter Diameter: 182.85mm\u003c\/li\u003e\n\u003cli\u003eCross Section Width: 0.06 in\u003c\/li\u003e\n\u003cli\u003eMaterial: Urethane Rubber\u003c\/li\u003e\n\u003cli\u003eNote: Compatible with petroleum-based lubricants and hydraulic fluids at moderate temperatures. Not for use with water-soluble fluids.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatible Models\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eCaterpillar (Cat):\u003c\/strong\u003e Compatible with Caterpillar equipment using hydraulic cylinder assemblies -- verify fitment against your cylinder part number before ordering. No specific model list was available in catalog data; this part appears in the Cat hydraulic sealing parts catalog as a cylinder backup ring.\u003c\/p\u003e\u003ch4\u003eReplaces Part Number(s):\u003c\/h4\u003e\u003cp\u003e1U1738, 1U-1738\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":42451631210579,"sku":"1U1738","price":24.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0079\/4060\/3955\/files\/1U1738_01.jpg?v=1757647560","url":"https:\/\/www.reliableaftermarketparts.com\/products\/1u1738-ring-backup-fits-caterpillar-models","provider":"Reliable Aftermarket Parts, Inc®","version":"1.0","type":"link"}