{"product_id":"boom-cylinder-seal-kit-707-99-67870-for-komatsu-pc300ll-pc400-pc550-excavator","title":"Boom Cylinder Seal Kit 707-99-67870 for Komatsu PC300LL PC400 PC550 Excavator","description":"\u003ch1 class=\"PDq2pG_selectionAnchorContainer\" data-end=\"1057\" data-start=\"1032\" data-section-id=\"xm4euj\"\u003e\n\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"1057\" data-start=\"1034\"\u003eProduct Description\u003c\/strong\u003e\u003c\/span\u003e\u003cspan class=\"PDq2pG_selectionAnchor\" aria-hidden=\"true\"\u003e\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp data-end=\"1096\" data-start=\"1059\"\u003e\u003cstrong data-end=\"1073\" data-start=\"1059\"\u003ePart Name:\u003c\/strong\u003e Boom Cylinder Seal Kit\u003c\/p\u003e\n\u003cp data-end=\"1130\" data-start=\"1098\"\u003e\u003cstrong data-end=\"1117\" data-start=\"1098\"\u003ePart Number(s):\u003c\/strong\u003e 707-99-67870\u003c\/p\u003e\n\u003cp data-end=\"1164\" data-start=\"1132\"\u003e\u003cstrong data-end=\"1156\" data-start=\"1132\"\u003eBrand Compatibility:\u003c\/strong\u003e Komatsu\u003c\/p\u003e\n\u003cp data-end=\"1203\" data-start=\"1166\"\u003e\u003cstrong data-end=\"1183\" data-start=\"1166\"\u003eMachine Type:\u003c\/strong\u003e Hydraulic Excavator\u003c\/p\u003e\n\u003cp data-end=\"1243\" data-start=\"1205\"\u003e\u003cstrong data-end=\"1219\" data-start=\"1205\"\u003eComponent:\u003c\/strong\u003e Boom Hydraulic Cylinder\u003c\/p\u003e\n\u003cp data-end=\"1269\" data-start=\"1245\"\u003e\u003cstrong data-end=\"1259\" data-start=\"1245\"\u003eCondition:\u003c\/strong\u003e Brand New\u003c\/p\u003e\n\u003cp data-end=\"1392\" data-start=\"1271\"\u003e\u003cstrong data-end=\"1284\" data-start=\"1271\"\u003eShipping:\u003c\/strong\u003e Fast worldwide shipping with secure packaging and reliable international delivery within 2–7 business days.\u003c\/p\u003e\n\u003cp data-end=\"2092\" data-start=\"1394\"\u003eThe \u003cstrong data-end=\"1437\" data-start=\"1398\"\u003e707-99-67870 Boom Cylinder Seal Kit\u003c\/strong\u003e is manufactured to OEM specifications for the \u003cstrong data-end=\"1511\" data-start=\"1484\"\u003eboom hydraulic cylinder\u003c\/strong\u003e fitted to selected \u003cstrong data-end=\"1603\" data-start=\"1531\"\u003eKomatsu PC300LL, PC350LL, PC390LL, PC400, PC450 and PC550 excavators\u003c\/strong\u003e. This complete hydraulic cylinder overhaul kit contains precision-engineered rod seals, piston seals, wear rings, guide rings, backup rings, O-rings and dust seals required to restore hydraulic sealing performance, eliminate hydraulic oil leakage and maintain optimum operating pressure. Manufactured from premium sealing materials, it is designed to withstand the demanding operating conditions encountered in construction, forestry, quarrying, mining and heavy earthmoving applications.\u003c\/p\u003e\n\u003cp data-end=\"2723\" data-start=\"2094\"\u003eThe boom hydraulic cylinder raises and lowers the excavator boom, allowing the machine to perform heavy lifting, trenching, loading and excavation operations efficiently. Continuous operation under high hydraulic pressures, heavy structural loads and harsh working environments gradually wears the cylinder seals. Damaged seals can result in hydraulic oil leakage, boom drift, reduced lifting capacity, slower hydraulic response and internal pressure bypass. Replacing the complete seal kit restores sealing integrity, improves hydraulic efficiency and helps maximise machine uptime while protecting internal cylinder components.\u003c\/p\u003e\n\u003cp data-end=\"2749\" data-start=\"2725\"\u003e\u003cstrong data-end=\"2749\" data-start=\"2725\"\u003eTypical Applications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"2881\" data-start=\"2751\"\u003eConstruction • Earthmoving • Forestry • Logging • Mining • Quarrying • Civil Infrastructure • Heavy Excavation • Material Handling\u003c\/p\u003e\n\u003cp data-end=\"2902\" data-start=\"2883\"\u003e\u003cstrong data-end=\"2902\" data-start=\"2883\"\u003eCommon Symptoms\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"3167\" data-start=\"2904\"\u003e\n\u003cli data-end=\"2950\" data-start=\"2904\" data-section-id=\"1akv3w5\"\u003eHydraulic oil leakage from the boom cylinder\u003c\/li\u003e\n\u003cli data-end=\"2979\" data-start=\"2951\" data-section-id=\"1t0sxul\"\u003eBoom drifting while raised\u003c\/li\u003e\n\u003cli data-end=\"3011\" data-start=\"2980\" data-section-id=\"6k1lq8\"\u003eReduced boom lifting capacity\u003c\/li\u003e\n\u003cli data-end=\"3043\" data-start=\"3012\" data-section-id=\"1pgc2x\"\u003eSlow boom lifting or lowering\u003c\/li\u003e\n\u003cli data-end=\"3080\" data-start=\"3044\" data-section-id=\"5jk99x\"\u003eInternal hydraulic pressure bypass\u003c\/li\u003e\n\u003cli data-end=\"3119\" data-start=\"3081\" data-section-id=\"2kva38\"\u003eDifficulty maintaining boom position\u003c\/li\u003e\n\u003cli data-end=\"3167\" data-start=\"3120\" data-section-id=\"buw839\"\u003eReduced hydraulic efficiency and productivity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"3201\" data-start=\"3169\"\u003e\u003cstrong data-end=\"3201\" data-start=\"3169\"\u003eCross-Reference Part Numbers\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"3236\" data-start=\"3203\"\u003e\u003cstrong data-end=\"3223\" data-start=\"3203\"\u003eOEM Part Number:\u003c\/strong\u003e 707-99-67870\u003cstrong data-end=\"3271\" data-start=\"3238\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"3354\" data-start=\"3333\"\u003e\u003cstrong data-end=\"3354\" data-start=\"3333\"\u003eCompatible Models\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"3440\" data-start=\"3356\"\u003e\u003cstrong data-end=\"3381\" data-start=\"3356\"\u003eHydraulic Excavators:\u003c\/strong\u003e Komatsu PC300LL, PC350LL, PC390LL, PC400, PC450 and PC550.\u003c\/p\u003e\n\u003cp data-end=\"3458\" data-start=\"3442\"\u003e\u003cstrong data-end=\"3458\" data-start=\"3442\"\u003eFitment Note\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"3792\" data-start=\"3460\"\u003ePlease verify the OEM part number, machine model, serial number and \u003cstrong data-end=\"3564\" data-start=\"3528\"\u003eboom hydraulic cylinder assembly\u003c\/strong\u003e before ordering. Komatsu may use different boom cylinder configurations depending on the machine model, production series and serial number. Contact Imara Engineering Supplies if you require assistance confirming compatibility.\u003c\/p\u003e","brand":"Imara Engineering Supplies","offers":[{"title":"Default Title","offer_id":45129190899912,"sku":"707-99-67870","price":189.0,"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-707-99-67870-for-komatsu-pc300ll-pc400-pc550-excavator","provider":"Imara Engineering Supplies","version":"1.0","type":"link"}