{"product_id":"4639939-arm-cylinder-seal-kit-hitachi","title":"4639939 ZX270-ZX280 Bucket Cylinder Seal Kit HITACHI","description":"\u003ch2 class=\"sec-head\"\u003eProduct Description\u003c\/h2\u003e\n\u003cp data-path-to-node=\"13\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003ePart number \u003cspan data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003e4639939\u003c!--TgQPHd||[[\u0026quot;SHOPPING_PRODUCT\u0026quot;,2,\u0026quot;\u0026quot;,\u0026quot;EgciAJIBApwB\u0026quot;,\u0026quot;Ruijueparts 4639939 Bucket Cylinder Seal Kit Hitachi John Deere Ruijueparts\u0026quot;,\u0026quot;\u0026quot;,\u0026quot;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\u0026quot;,null,0,null,[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,1],0,0,null,null,0,0,[],\u0026quot;\u0026quot;,0,0],\u0026quot;pa07asLvLo6O4-EPy8OHQQ_0\u0026quot;]--\u003e\u003c\/span\u003e is a high-performance hydraulic bucket cylinder seal kit designed for heavy-duty excavation. It is the designated aftermarket replacement for Hitachi and John Deere excavators, engineered to withstand the extreme abrasive conditions of digging. Made from premium NBR and hydrolysis-resistant polyurethane, this kit ensures tight sealing against dirt ingress and fluid loss. At Ruijueparts, we leverage a database of 30,000+ part numbers to guarantee precise fitment. We provide durable, cost-effective alternatives to OEM parts, with options for custom manufacturing and neutral packaging.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2 class=\"section-title__title\" id=\"s0-2-1-25-5-20-1-101[1]-2-3-7[0]-4[0]-3[0]-11[1]-1-5-title\"\u003e\u003cspan class=\"ux-layout-section-module-evo__title\" data-testid=\"ux-textual-display\"\u003e\u003cspan class=\"ux-textspans\"\u003eItem specifics\u003c\/span\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable style=\"width: 100.088%;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 33.7188%;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003ePart Number:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.8534%;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e4639939\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 33.7188%;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003eFits Models:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.8534%;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eZX270, ZX270LC, ZX280LC, ZX280LCN, ZX300W, ZAXIS250F, \u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 33.7188%;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003eBrand:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.8534%;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cspan\u003eHitachi \u003cmeta charset=\"utf-8\"\u003ereplacement\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 33.7188%;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003eType:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.8534%;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eBoom Cylinder Seal Kit \/ Aftermarket Replacement Parts\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 33.7188%;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cspan data-path-to-node=\"3,9,1,0\"\u003eApplication:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.8534%;\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cstrong class=\"Yjhzub\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003eTrust Endorsement\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e: Produced in our ISO9001-certified facility, these kits are tested to handle high-frequency pressure spikes, ensuring your fleet maintains peak digging force and operational safety.\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cstrong class=\"Yjhzub\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003eKeyword Anchor \u0026amp; Action Verbs\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e: Specifically designed to \u003cstrong class=\"Yjhzub\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003eseal the bucket cylinder\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e, \u003cstrong class=\"Yjhzub\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003eblock abrasive contaminants\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e like sand and dust, and \u003cstrong class=\"Yjhzub\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003eprevent hydraulic fluid bypass\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e. It allows you to \u003cstrong class=\"Yjhzub\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003eoverhaul\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e the final digging point of the machine to restore breakout force.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cstrong class=\"Yjhzub\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003eHitachi Zaxis Series\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e\u003cspan class=\"T286Pc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003e: ZX270, ZX270LC, ZX280LC, ZX280LCN, ZX300W, ZAXIS250F\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan class=\"T286Pc\" data-sfc-cp=\"\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 400; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003cstrong class=\"Yjhzub\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003eJohn Deere Series\u003c!--TgQPHd||[]--\u003e\u003c\/strong\u003e: 270C, 270C LC, 2554\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 33.7188%;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003eSize:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.8534%;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eStandard Size\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eFAQ\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eQ1: \u003cmeta charset=\"utf-8\"\u003eWill this \u003cspan data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003e4639939 seal kit\u003c!--TgQPHd||[[\u0026quot;SHOPPING_PRODUCT\u0026quot;,2,\u0026quot;\u0026quot;,\u0026quot;EgciAJIBApwB\u0026quot;,\u0026quot;Ruijueparts 4639939 Bucket Cylinder Seal Kit Ruijueparts\u0026quot;,\u0026quot;\u0026quot;,\u0026quot;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\u0026quot;,null,0,null,[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,1],0,0,null,null,0,0,[],\u0026quot;\u0026quot;,0,0],\u0026quot;pa07asLvLo6O4-EPy8OHQQ_2\u0026quot;]--\u003e\u003c\/span\u003e fit my excavator's bucket cylinder?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eThis kit is engineered for bucket cylinders with a \u003cstrong class=\"Yjhzub\" data-sfc-root=\"ep\" data-sfc-cb=\"\" data-complete=\"true\" data-copy-service-computed-style='font-family: \"Google Sans\", Arial, sans-serif; font-size: 16px; font-weight: 700; margin: 0px; text-decoration: none; border-bottom: 0px rgb(10, 10, 10);'\u003e90 mm rod and 135 mm bore.\u003c\/strong\u003e Please confirm your cylinder dimensions or provide your machine's serial number, and we will verify the match using our comprehensive database of over 30,000 items.\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eQ2: \u003cmeta charset=\"utf-8\"\u003eMy excavator works in extreme dust and mud. Are these seals durable enough?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003eA:\u003c\/strong\u003e \u003cmeta charset=\"utf-8\"\u003eYes. Since the bucket cylinder is closest to the ground, we use reinforced wiper seals and high-grade polyurethane rod seals specifically designed to exclude abrasive particles and withstand harsh working environments.\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eQ3: How do I order if I have an older machine model not listed here?\u003cbr\u003eA: \u003c\/strong\u003eWe specialize in \"difficult-to-find\" parts. If your machine is an older generation, simply send us the part number or physical sample measurements, and our custom manufacturing team can produce a tailored sealing solution for you.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RuiJueParts","offers":[{"title":"Default Title","offer_id":51696153854183,"sku":"4639939","price":36.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5251\/9399\/files\/4639939_seal.jpg?v=1782296471","url":"https:\/\/www.ruijueparts.com\/products\/4639939-arm-cylinder-seal-kit-hitachi","provider":"RuiJueParts","version":"1.0","type":"link"}