{"product_id":"5442390-boom-swing-cylinder-seal-kit","title":"5442390 Boom Swing Cylinder Seal Kit For MST M542 | Ruijueparts","description":"\u003ch2 class=\"sec-head\"\u003eProduct Description\u003c\/h2\u003e\n\u003cdiv class=\"n6owBd awi2gc\"\u003e\n\u003cp\u003e\u003cspan\u003e5442390 is an aftermarket hydraulic seal kit reference for the boom swing, or arm-rotation, cylinder on MST backhoe loaders. It supports the cylinder that pivots the excavator boom laterally, rather than the lift, dipper, or bucket cylinder. Published catalogs list MST M542, M544, M542 Plus, M544 Plus, M642, and M644, and market records associate it with KK473. Confirm the machine serial number, cylinder group, and installed reference before ordering. Ruijueparts can assist with part-number checking, mixed-SKU inquiries, and neutral or customer-specified packaging.\u003c\/span\u003e\u003c\/p\u003e\n\u003cbr\u003e\u003c!--TgQPHd||[]--\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"Fsg96\"\u003e\u003c!--TgQPHd||[]--\u003e\u003c\/div\u003e\n\u003ch2 id=\"s0-2-1-25-5-20-1-101[1]-2-3-7[0]-4[0]-3[0]-11[1]-1-5-title\" class=\"section-title__title\"\u003e\u003cspan class=\"ux-layout-section-module-evo__title\"\u003e\u003cspan class=\"ux-textspans\"\u003eItem specifics\u003c\/span\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable width=\"100%\" style=\"width: 100.088%; height: 345.571px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 22.6641px;\"\u003e\n\u003ctd style=\"width: 33.6518%; height: 22.6641px;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003ePart Number:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd class=\"et2\" height=\"17\" width=\"76\" style=\"height: 22.6641px; width: 65.9112%;\"\u003e5442390\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.6518%; height: 19.5938px;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003eFits Models:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9112%; height: 19.5938px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eM542, M544, M542 Plus, M544 Plus, M642, M644\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.6518%; height: 19.5938px;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003eBrand:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9112%; height: 19.5938px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eMASTAS replacement\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 59.7812px;\"\u003e\n\u003ctd style=\"width: 33.6518%; height: 59.7812px;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003eType:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9112%; height: 59.7812px;\"\u003e\n\u003cmeta charset=\"utf-8\"\u003eAftermarket Dipper Arm Cylinder Seal Kit\u003cbr\u003eHydraulic Cylinder Repair Seal Kit\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 204.344px;\"\u003e\n\u003ctd style=\"width: 33.6518%; height: 204.344px;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cspan\u003eApplication:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9112%; height: 204.344px;\"\u003e\n\u003cul\u003e\n\u003cli\u003eFor MST-compatible backhoe loaders during removal, inspection, resealing, and reinstallation of the excavator boom swing \/ arm-rotation hydraulic cylinder. Suitable for workshops, dealers, and fleet maintenance teams. Verify cylinder position and serial number before purchase.\u003c\/li\u003e\n\u003cli\u003eBackhoe Loaders: M542, M544, M542 Plus, M544 Plus, M642, M644\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.6518%; height: 19.5938px;\"\u003e\u003cstrong\u003e\u003cmeta charset=\"utf-8\"\u003eSize:\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.9112%; height: 19.5938px;\"\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: What does the MST 5442390 seal kit repair?\u003c\/strong\u003e\u003cbr\u003e\u003cb\u003eA: \u003c\/b\u003eIt is used to reseal the boom swing, or arm-rotation, hydraulic cylinder that moves the excavator boom laterally on applicable MST backhoe loaders.\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eQ2: Is 5442390 a travel or swing motor seal kit?\u003cbr\u003e\u003c\/strong\u003e\u003cb\u003eA: \u003c\/b\u003eNo. It is a hydraulic cylinder repair kit, not a hydraulic motor seal kit. Its application is the boom swing cylinder.\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eQ3: Which machines can use 5442390?\u003cbr\u003eA:\u003c\/strong\u003e Published catalogs list MST M542, M544, M542 Plus, M544 Plus, M642, and M644. Confirm serial number and cylinder configuration before purchase.\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RuiJueParts","offers":[{"title":"Default Title","offer_id":52517343658215,"sku":"5442390","price":16.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5251\/9399\/files\/5442390.png?v=1787640503","url":"https:\/\/www.ruijueparts.com\/products\/5442390-boom-swing-cylinder-seal-kit","provider":"RuiJueParts","version":"1.0","type":"link"}