{"title":"Kubota Final Drives","description":"\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eKubota Final Drives Across the KX and U Series Range\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eKubota produces compact excavators across two primary families  and the final drive specification, hydraulic pressure rating, and duty cycle demands differ meaningfully between them.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe U series is Kubota's zero tail-swing range designed for confined access sites where swing radius is a constraint. U series machines operate in environments demanding constant repositioning, tight manoeuvring, and full hydraulic engagement in conditions where larger machines cannot go. The directional cycling and confined-space intensity of U series applications places a specific and demanding load on the final drive different in character from the sustained travel loads of KX series operation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe models most frequently requiring Kubota final drive replacement are:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eKX016 \/ KX018\u003c\/span\u003e\u003cspan\u003e — ultra-compact machines for tight residential and garden access. The smallest final drive in the Komatsu range among the most frequently replaced due to intensive confined-access duty cycles.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eKX040\u003c\/span\u003e\u003cspan\u003e — 4-tonne class compact excavator widely distributed across landscaping, drainage, and light construction. A hire fleet and owner-operator staple.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eKX057 \/ KX080\u003c\/span\u003e\u003cspan\u003e — heavier civil, agricultural drainage, and infrastructure applications. Higher hydraulic pressure rating than the smaller KX models specification accuracy is critical.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eKX121\u003c\/span\u003e\u003cspan\u003e — one of the most widely operated Kubota excavators in agricultural contracting and civil groundworks globally. The Kubota KX121 final drive is among our highest-volume specifications these machines run hard across seasonal agricultural programmes and construction contracts and their final drives reflect that intensity.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eU17\u003c\/span\u003e\u003cspan\u003e — 1.7-tonne zero tail-swing machine and one of the most widely operated compact excavators in the landscaping and residential construction sector worldwide. The Kubota U17 final drive is a consistently fast-moving stock item; the U17's intensive confined-access duty cycle generates a replacement frequency that exceeds most machines in its weight class.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eU27 \/ U35\u003c\/span\u003e\u003cspan\u003e — 2.7 to 3.5-tonne zero swing machines common in utility trenching and confined civil work.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eWarning Signs  When Your Kubota Final Drive Is Failing\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eKubota machines are consistent performers which makes deviations from normal travel behaviour identifiable earlier than on machines with less consistent hydraulic tuning:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eYour Kubota drifting to one side during travel on level ground\u003c\/span\u003e\u003cspan\u003e — one final drive is underperforming. On a U series machine this is especially apparent the zero tail-swing design and constant directional changes make a drifting machine immediately disruptive to confined-access operation.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eOil residue around the Kubota drive sprocket\u003c\/span\u003e\u003cspan\u003e — seal failure. Do not normalise minor oil weeping. Kubota's hydraulic system pushes oil through a compromised seal progressively — minor weeping becomes significant oil loss within days.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eGrinding or whining noise during travel\u003c\/span\u003e\u003cspan\u003e — planetary gear wear or bearing failure. Travel-specific noise on a Kubota is the final drive communicating internal wear. It worsens progressively with every operating hour.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eKX or U series machine travelling noticeably slower on one side\u003c\/span\u003e\u003cspan\u003e — partial planetary failure. Hydraulic pressure is reaching the unit but the Kubota final drive is not converting it to full torque output.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eHeat from the Kubota drive sprocket after short operation\u003c\/span\u003e\u003cspan\u003e — oil starvation. On a U series machine running intensive repositioning cycles, this condition reaches destructive temperatures faster than on machines with longer travel intervals between load cycles.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eComplete loss of drive on one side\u003c\/span\u003e\u003cspan\u003e — end-stage planetary failure. Do not drive the machine on the remaining functional side the asymmetric load damages the \u003ca href=\"https:\/\/imaraengineeringsupplies.com\/collections\/track-adjuster\"\u003etrack adjuster\u003c\/a\u003e, \u003ca href=\"https:\/\/imaraengineeringsupplies.com\/collections\/sprockets\"\u003esprocket\u003c\/a\u003e, and \u003ca href=\"https:\/\/imaraengineeringsupplies.com\/collections\/rubber-tracks\"\u003erubber track\u003c\/a\u003e on the working side simultaneously.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eKubota KX121 Final Drive, Agricultural Contractings Most Demanded Specification\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe KX121 occupies a unique position in the Kubota range sitting at the boundary between compact and mid-size excavator, it is the preferred choice of agricultural contractors who need genuine digging performance in a machine that can still be transported easily. These machines work hard across drainage programmes, irrigation installation, and farm track construction. The Kubota KX121 final drive on a machine running a full drainage season accumulates operating hours and thermal cycles that compress expected service life significantly.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe KX121 final drive operates at a higher hydraulic system pressure than the smaller KX models and the KX121-3 variant carries specific dimensional characteristics that differ from earlier KX121 production. Serial number verification on a KX121 final drive order is not a precaution, it is a necessity. At Imara Engineering, we hold the KX121 final drive as a dedicated priority stock specification precisely because agricultural contractors cannot wait on a sourced-to-order lead time during a drainage season.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eWhat Every Imara Engineering Kubota Final Drive Is Verified Against\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eFour verification checkpoints are applied to every Kubota final drive before dispatch:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eSerial number cross-reference against the Kubota OEM parts database\u003c\/span\u003e\u003cspan\u003e — hydraulic pressure rating, reduction ratio, and mounting configuration confirmed for your specific KX or U series model and production year. Both families carry production variants that cannot be reliably specified from model name alone.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eHydraulic pressure integrity test at Kubota-rated operating pressure\u003c\/span\u003e\u003cspan\u003e — every unit tested at the hydraulic pressure rating for its specific KX or U series application. A unit that fails does not leave our facility.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003ePlanetary gear reduction ratio verification\u003c\/span\u003e\u003cspan\u003e — confirmed against Kubota OEM specification. Travel speed, tractive effort, and slope performance will match Kubota factory specification from the first operating hour.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eFull oil charge and port protection\u003c\/span\u003e\u003cspan\u003e — every Kubota final drive ships with the correct-grade oil charge installed and hydraulic port protectors fitted. Ready to install on arrival.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eOEM Kubota final drives carry a brand premium above equivalent aftermarket specification. At Imara Engineering, the serial number verification, pressure test, and fitment guarantee replicate the Kubota dealer standard. The premium does not.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003e\u003cspan\u003eWhat to Inspect Alongside a Kubota Final Drive Replacement\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eKubota's compact and tightly integrated undercarriage means a degrading final drive distributes stress to surrounding Kubota undercarriage parts more directly than on larger machines:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eKubota Drive Sprocket\u003c\/span\u003e\u003cspan\u003e — a final drive running under degraded conditions delivers uneven torque to the sprocket. Inspect for hook wear and replace where evident. A damaged sprocket stresses a new Kubota final drive from the first operating hour.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eKubota Travel Motor\u003c\/span\u003e\u003cspan\u003e — if the final drive failed due to seal degradation and hydraulic fluid shows contamination, inspect the travel motor before refitting. A new final drive exposed to contaminated fluid is a repeat failure within months.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003ca href=\"https:\/\/imaraengineeringsupplies.com\/collections\/rubber-tracks\"\u003e\u003cspan\u003eRubber Tracks\u003c\/span\u003e\u003c\/a\u003e\u003cspan\u003e — abnormal Kubota final drive behaviour creates uneven tension across the rubber track. Inspect inner surface and steel cord condition before the machine returns to work. See our \u003ca href=\"https:\/\/imaraengineeringsupplies.com\/collections\/kubota-rubber-tracks?_pos=1\u0026amp;_psq=kubota+rubber\u0026amp;_ss=e\u0026amp;_v=1.0\"\u003eKubota Rubber Tracks  \u003c\/a\u003epage for KX and U series track specifications.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\" role=\"presentation\"\u003e\n\u003cspan\u003eTrack Adjusters\u003c\/span\u003e\u003cspan\u003e — confirm correct tension is maintained independently of the final drive replacement. A worn Kubota track adjuster puts immediate load on a new final drive from the first operating hour.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"final-drive-for-kubota-kx91-2-excavator","title":"Final Drive for Kubota KX91-2 Excavator","description":"\u003ch3 data-start=\"151\" data-end=\"174\"\u003e\u003cstrong data-start=\"151\" data-end=\"172\"\u003eProduct Overview:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"176\" data-end=\"219\"\u003e\u003cstrong data-start=\"176\" data-end=\"190\"\u003ePart Name:\u003c\/strong\u003e Final Drive \/ Travel Motor\u003c\/p\u003e\n\u003cp data-start=\"221\" data-end=\"265\"\u003e\u003cstrong data-start=\"221\" data-end=\"238\"\u003ePart Numbers:\u003c\/strong\u003e OEM Part \/ Not specified\u003c\/p\u003e\n\u003cp data-start=\"267\" data-end=\"418\"\u003e\u003cstrong data-start=\"267\" data-end=\"283\"\u003eApplication:\u003c\/strong\u003e Designed for \u003cstrong data-start=\"297\" data-end=\"325\"\u003eKubota KX91-2 excavators\u003c\/strong\u003e, providing reliable track drive power for smooth, precise, and efficient travel operation.\u003c\/p\u003e\n\u003cp data-start=\"420\" data-end=\"472\"\u003e\u003cstrong data-start=\"420\" data-end=\"434\"\u003eCondition:\u003c\/strong\u003e Brand New \/ OEM-Quality Replacement\u003c\/p\u003e\n\u003cp data-start=\"474\" data-end=\"489\"\u003e\u003cstrong data-start=\"474\" data-end=\"487\"\u003eFunction:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"492\" data-end=\"534\"\u003ePowers the tracks for excavator mobility\u003c\/p\u003e\n\u003cp data-start=\"537\" data-end=\"583\"\u003eEnsures stable, smooth, and precise movement\u003c\/p\u003e\n\u003cp data-start=\"586\" data-end=\"640\"\u003eEnhances operational efficiency and reduces downtime\u003c\/p\u003e\n\u003ch3 data-start=\"642\" data-end=\"673\"\u003e\u003cstrong data-start=\"642\" data-end=\"671\"\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"675\" data-end=\"723\"\u003e\u003cstrong data-start=\"675\" data-end=\"684\"\u003eType:\u003c\/strong\u003e Hydraulic Final Drive \/ Travel Motor\u003c\/p\u003e\n\u003cp data-start=\"725\" data-end=\"802\"\u003e\u003cstrong data-start=\"725\" data-end=\"738\"\u003eMaterial:\u003c\/strong\u003e High-strength alloy steel with precision hydraulic components\u003c\/p\u003e\n\u003cp data-start=\"804\" data-end=\"822\"\u003e\u003cstrong data-start=\"804\" data-end=\"820\"\u003ePerformance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"825\" data-end=\"866\"\u003eDurable under continuous heavy-duty use\u003c\/p\u003e\n\u003cp data-start=\"869\" data-end=\"913\"\u003eResistant to vibration, heat, and pressure\u003c\/p\u003e\n\u003cp data-start=\"916\" data-end=\"966\"\u003eDirect-fit OEM replacement for easy installation\u003c\/p\u003e\n\u003cp data-start=\"968\" data-end=\"1019\"\u003e\u003cstrong data-start=\"968\" data-end=\"993\"\u003eCompatible Equipment:\u003c\/strong\u003e Kubota KX91-2 Excavator\u003c\/p\u003e\n\u003cp data-start=\"1021\" data-end=\"1064\"\u003e\u003cstrong data-start=\"1021\" data-end=\"1047\"\u003eOperating Temperature:\u003c\/strong\u003e -40°C to +85°C\u003c\/p\u003e\n\u003cp data-start=\"1066\" data-end=\"1097\"\u003e\u003cstrong data-start=\"1066\" data-end=\"1077\"\u003eWeight:\u003c\/strong\u003e Approx. 70–120 kg\u003c\/p\u003e\n\u003cp data-start=\"1099\" data-end=\"1217\"\u003e\u003cstrong data-start=\"1099\" data-end=\"1127\"\u003eDelivery \u0026amp; Availability: \u003c\/strong\u003eGlobal Shipping Available | Secure packaging | Estimated delivery: 5–10 business days\u003c\/p\u003e","brand":"Imara Engineering Supplies","offers":[{"title":"Default Title","offer_id":43945040806088,"sku":"1600213876484","price":2800.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0600\/5348\/7816\/files\/Hef52a3ba21034062b76b696d540d995eo.webp?v=1721164040"},{"product_id":"hydraulic-final-drive-travel-motor-ra251-61290-ra25161290-ra251-61292-ra25161292-for-kubota-mini-excavator-u15-u15-3","title":"Hydraulic Final Drive Travel Motor RA251-61290 RA25161290 RA251-61292 RA25161292 for Kubota Mini Excavator U15 U15-3","description":"\u003ch2 data-section-id=\"1bw7wp4\" data-start=\"136\" data-end=\"158\"\u003eProduct Description\u003c\/h2\u003e\n\u003cp data-start=\"160\" data-end=\"210\"\u003e\u003cstrong data-start=\"160\" data-end=\"174\"\u003ePart Name:\u003c\/strong\u003e Hydraulic Final Drive Travel Motor.\u003c\/p\u003e\n\u003cp data-start=\"212\" data-end=\"281\"\u003e\u003cstrong data-start=\"212\" data-end=\"231\"\u003ePart Number(s):\u003c\/strong\u003e RA251-61290, RA25161290, RA251-61292, RA25161292.\u003c\/p\u003e\n\u003cp data-start=\"283\" data-end=\"315\"\u003e\u003cstrong data-start=\"283\" data-end=\"307\"\u003eBrand Compatibility:\u003c\/strong\u003e Kubota.\u003c\/p\u003e\n\u003cp data-start=\"317\" data-end=\"377\"\u003e\u003cstrong data-start=\"317\" data-end=\"334\"\u003eMachine Type:\u003c\/strong\u003e Mini Excavator Hydraulic Drive Components.\u003c\/p\u003e\n\u003cp data-start=\"379\" data-end=\"427\"\u003e\u003cstrong data-start=\"379\" data-end=\"390\"\u003eSystem:\u003c\/strong\u003e Final Drive and Travel Motor System.\u003c\/p\u003e\n\u003cp data-start=\"429\" data-end=\"454\"\u003e\u003cstrong data-start=\"429\" data-end=\"443\"\u003eCondition:\u003c\/strong\u003e Brand New.\u003c\/p\u003e\n\u003cp data-start=\"456\" data-end=\"578\"\u003e\u003cstrong data-start=\"456\" data-end=\"469\"\u003eShipping:\u003c\/strong\u003e Fast world-wide shipping available with secure packaging, 2–7 days delivery, and reliable logistics service.\u003c\/p\u003e\n\u003cp data-start=\"580\" data-end=\"809\"\u003eBrand-new hydraulic final drive travel motor RA251-61290 RA25161290 RA251-61292 RA25161292 for Kubota U15 and U15-3 mini excavators. Designed for track drive power, crawler movement, travel torque, and compact excavator mobility.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1bbsrtm\" data-start=\"811\" data-end=\"842\"\u003eCross-Reference Part Numbers\u003c\/h2\u003e\n\u003cp data-start=\"844\" data-end=\"905\"\u003e\u003cstrong data-start=\"844\" data-end=\"855\"\u003eKubota:\u003c\/strong\u003e RA251-61290, RA25161290, RA251-61292, RA25161292.\u003c\/p\u003e\n\u003cp data-start=\"907\" data-end=\"1012\"\u003e\u003cstrong data-start=\"907\" data-end=\"937\"\u003eRelated Kubota References:\u003c\/strong\u003e RA221-61290, RA22161290, RA251-61293, RA25161293, RB238-61292, RB23861292.\u003c\/p\u003e","brand":"Imara Engineering Supplies","offers":[{"title":"Default Title","offer_id":45076562116808,"sku":"1601671964812","price":4525.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0600\/5348\/7816\/files\/Hydraulic_Final_Drive_Travel_Motor_RA251-61290_RA25161290_RA251-61292_RA25161292_for_Kubota_Mini_Excavator_U15_U15-3.webp?v=1778714559"}],"url":"https:\/\/imaraengineeringsupplies.com\/collections\/kubota-final-drives.oembed","provider":"Imara Engineering Supplies","version":"1.0","type":"link"}