{"product_id":"john-deere-o-ring-r518543","title":"John Deere O-Ring - R518543","description":"\u003cdiv\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered to maintain sealed pressure boundaries and prevent hydraulic fluid escape across static joint interfaces\u003c\/li\u003e\n\u003cli\u003eSynthetic nitrile rubber compound provides sustained elasticity when exposed to petroleum distillates, water-glycol coolants, and abrasive particulate suspensions\u003c\/li\u003e\n\u003cli\u003eUniform cross-sectional geometry delivers consistent compression set resistance, eliminating channeling or blowout under pulsating pump cycles\u003c\/li\u003e\n\u003cli\u003eManufactured to reproduce original equipment dimensional tolerances, allowing direct replacement without gland re-machining or fastener retorque\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cbr\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eManufacturer Part Designation: R518543\u003c\/li\u003e\n\u003cli\u003eComponent Type: Hydraulic O-Ring \/ Static Elastomeric Seal\u003c\/li\u003e\n\u003cli\u003eMateriel Base: Buna-N (Nitrile) with integrated thermal aging inhibitors\u003c\/li\u003e\n\u003cli\u003eShore A Hardness: 70 ±5\u003c\/li\u003e\n\u003cli\u003eOptimal Service Environment: -40°F to +250°F (-40°C to +121°C)\u003c\/li\u003e\n\u003cli\u003eGeometry Class: Circular cross-section rated for ISO 6149-1 and SAEJ1453 compliant sealing grooves\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis seal is sized and compounded to restore factory leak rates in hydraulic pump outlets, valve bank gasket seats, and cylinder rod ports where repeated thermal cycling would degrade standard rubber grommets.\u003c\/p\u003e\n\u003cbr\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJohn Deere tractor and combine platforms utilizing enclosed hydraulic reservoirs and gear-driven pumps\u003c\/li\u003e\n\u003cli\u003eHearson hydrostatic transmissions, integral flow-control spools, and auxiliary coupler manifolds\u003c\/li\u003e\n\u003cli\u003eAgricultural implement control cylinders, loader bucket pivot bearings, and steering axis glands\u003c\/li\u003e\n\u003cli\u003eMatches OEM reference listings for JD seal kit part numbers 8200-4624, 66-7727, and replacement designations FRU 518543\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"John Deere","offers":[{"title":"Default Title","offer_id":58562338849149,"sku":"JD-R518543","price":1.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/9190\/9056\/files\/R518543_iso1.webp?v=1787220197","url":"https:\/\/ripongroundcare.com\/products\/john-deere-o-ring-r518543","provider":"Ripon Ground Care","version":"1.0","type":"link"}