{"product_id":"boom-cylinder-seal-kit-707-99-67110-komatsu-pc300-5-pc350-6","title":"Boom Cylinder Seal Kit 707-99-67110 for Komatsu PC300 PC350 Excavator","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a557081-1368-83ea-9ad7-6d5bf6a74d8a-12\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a557081-1368-83ea-9ad7-6d5bf6a74d8a-12\" data-turn-id-container=\"request-6a557081-1368-83ea-9ad7-6d5bf6a74d8a-12\" data-testid=\"conversation-turn-236\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-15 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"2be46ff3-8c99-4727-9457-ef8cb23a126e\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003ch1 data-section-id=\"xm4euj\" data-start=\"1353\" data-end=\"1378\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\n\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1355\" data-end=\"1378\"\u003eProduct Description\u003c\/strong\u003e\u003c\/span\u003e\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp data-start=\"1380\" data-end=\"1417\"\u003e\u003cstrong data-start=\"1380\" data-end=\"1394\"\u003ePart Name:\u003c\/strong\u003e Boom Cylinder Seal Kit\u003c\/p\u003e\n\u003cp data-start=\"1419\" data-end=\"1451\"\u003e\u003cstrong data-start=\"1419\" data-end=\"1438\"\u003ePart Number(s):\u003c\/strong\u003e 707-99-67110\u003c\/p\u003e\n\u003cp data-start=\"1453\" data-end=\"1485\"\u003e\u003cstrong data-start=\"1453\" data-end=\"1477\"\u003eBrand Compatibility:\u003c\/strong\u003e Komatsu\u003c\/p\u003e\n\u003cp data-start=\"1487\" data-end=\"1524\"\u003e\u003cstrong data-start=\"1487\" data-end=\"1504\"\u003eMachine Type:\u003c\/strong\u003e Hydraulic Excavator\u003c\/p\u003e\n\u003cp data-start=\"1526\" data-end=\"1564\"\u003e\u003cstrong data-start=\"1526\" data-end=\"1540\"\u003eComponent:\u003c\/strong\u003e Boom Hydraulic Cylinder\u003c\/p\u003e\n\u003cp data-start=\"1566\" data-end=\"1590\"\u003e\u003cstrong data-start=\"1566\" data-end=\"1580\"\u003eCondition:\u003c\/strong\u003e Brand New\u003c\/p\u003e\n\u003cp data-start=\"1592\" data-end=\"1734\"\u003e\u003cstrong data-start=\"1592\" data-end=\"1605\"\u003eShipping:\u003c\/strong\u003e Fast worldwide shipping with secure packaging, reliable international logistics and estimated delivery within 2–7 business days.\u003c\/p\u003e\n\u003cp data-start=\"1736\" data-end=\"2293\"\u003eThe \u003cstrong data-start=\"1740\" data-end=\"1779\"\u003e707-99-67110 Boom Cylinder Seal Kit\u003c\/strong\u003e is manufactured to OEM specifications for the \u003cstrong data-start=\"1826\" data-end=\"1853\"\u003eboom hydraulic cylinder\u003c\/strong\u003e fitted to selected \u003cstrong data-start=\"1873\" data-end=\"1944\"\u003eKomatsu PC300-5, PC300-6, PC310-6, PC350-6 and PC350LC-6 excavators\u003c\/strong\u003e. This complete overhaul kit contains the precision seals, wear rings, backup rings and O-rings required to restore hydraulic sealing, maintain operating pressure and eliminate internal and external oil leakage. Designed for demanding excavation environments, it helps return the boom cylinder to reliable working condition and extends service life.\u003c\/p\u003e\n\u003cp data-start=\"2295\" data-end=\"2828\"\u003eThe boom cylinder is responsible for raising and lowering the excavator boom, supporting heavy lifting, trenching, loading and excavation tasks. Continuous exposure to high hydraulic pressures, heavy loads and abrasive contaminants gradually wears the sealing components. Seal failure can lead to hydraulic oil leakage, boom drift, reduced lifting capacity and slower hydraulic response. Installing a complete seal kit restores cylinder efficiency, protects internal components from premature wear and helps minimise costly downtime.\u003c\/p\u003e\n\u003cp data-start=\"2830\" data-end=\"2854\"\u003e\u003cstrong data-start=\"2830\" data-end=\"2854\"\u003eTypical Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"2856\" data-end=\"2998\"\u003eConstruction • Earthmoving • Mining • Quarrying • Civil Infrastructure • Road Construction • Demolition • Heavy Excavation • Material Handling\u003c\/p\u003e\n\u003cp data-start=\"3000\" data-end=\"3019\"\u003e\u003cstrong data-start=\"3000\" data-end=\"3019\"\u003eCommon Symptoms\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"3021\" data-end=\"3263\"\u003e\n\u003cli data-section-id=\"1akv3w5\" data-start=\"3021\" data-end=\"3067\"\u003eHydraulic oil leakage from the boom cylinder\u003c\/li\u003e\n\u003cli data-section-id=\"1t0sxul\" data-start=\"3068\" data-end=\"3096\"\u003eBoom drifting while raised\u003c\/li\u003e\n\u003cli data-section-id=\"19awo4p\" data-start=\"3097\" data-end=\"3125\"\u003eReduced boom lifting force\u003c\/li\u003e\n\u003cli data-section-id=\"r7g28n\" data-start=\"3126\" data-end=\"3157\"\u003eSlow boom raising or lowering\u003c\/li\u003e\n\u003cli data-section-id=\"5jk99x\" data-start=\"3158\" data-end=\"3194\"\u003eInternal hydraulic pressure bypass\u003c\/li\u003e\n\u003cli data-section-id=\"nxggrm\" data-start=\"3195\" data-end=\"3229\"\u003eDifficulty holding boom position\u003c\/li\u003e\n\u003cli data-section-id=\"dm78ko\" data-start=\"3230\" data-end=\"3263\"\u003eReduced excavation productivity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3265\" data-end=\"3297\"\u003e\u003cstrong data-start=\"3265\" data-end=\"3297\"\u003eCross-Reference Part Numbers\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"3299\" data-end=\"3332\"\u003e\u003cstrong data-start=\"3299\" data-end=\"3319\"\u003eOEM Part Number:\u003c\/strong\u003e 707-99-67110\u003c\/p\u003e\n\u003cp data-start=\"3429\" data-end=\"3450\"\u003e\u003cstrong data-start=\"3429\" data-end=\"3450\"\u003eCompatible Models\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"3452\" data-end=\"3535\"\u003e\u003cstrong data-start=\"3452\" data-end=\"3477\"\u003eHydraulic Excavators:\u003c\/strong\u003e Komatsu PC300-5, PC300-6, PC310-6, PC350-6 and PC350LC-6.\u003c\/p\u003e\n\u003cp data-start=\"3537\" data-end=\"3553\"\u003e\u003cstrong data-start=\"3537\" data-end=\"3553\"\u003eFitment Note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"3555\" data-end=\"3885\"\u003ePlease verify the OEM part number, machine model, serial number and \u003cstrong data-start=\"3623\" data-end=\"3659\"\u003eboom hydraulic cylinder assembly\u003c\/strong\u003e before ordering. Komatsu may use different boom cylinder configurations depending on the machine model, production year and serial number. Contact Imara Engineering Supplies if you require assistance confirming compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1\"\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv aria-hidden=\"true\" class=\"pointer-events-none -mt-px h-px translate-y-(--scroll-root-safe-area-inset-bottom)\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Imara Engineering Supplies","offers":[{"title":"Default Title","offer_id":45129190605000,"sku":"707-99-67110","price":199.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0600\/5348\/7816\/files\/Bucket_Cylinder_Seal_Kit_707-99-66380_for_Komatsu_WA430-6_Wheel_Loader.png?v=1784749445","url":"https:\/\/imaraengineeringsupplies.com\/products\/boom-cylinder-seal-kit-707-99-67110-komatsu-pc300-5-pc350-6","provider":"Imara Engineering Supplies","version":"1.0","type":"link"}