{"product_id":"yuantuo-trailer-axle-oil-bath-dust-caps-k71-704-00-clear-polycarbonate-4-pack-3-5-od-12-thread-for-dexter-9k-10k","title":"YUANTUO Trailer Axle Oil Bath Dust Caps K71-704-00 — Clear Polycarbonate 4‑Pack, 3.5\" OD 12‑Thread for Dexter 9K\/10K","description":"\u003cp\u003e\u003cstrong\u003eYUANTUO K71-704-00 21-88 oil bath dust caps are transparent polycarbonate axle seals designed to fit Dexter 9K\/10K trailer drums (3.5\" OD, 12-thread) and come as a 4-piece maintenance kit.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis replacement kit provides the complete set of dust caps and seals needed to protect wheel-end components on compatible trailer axles. The caps are clear and colorless, finished from durable polycarbonate, and packaged with rubber plugs and O-rings for straightforward installation. Before ordering, verify fitment: these caps are made for Drum No. 8-415 (from July 2009) and Drum No. 8-430 (from April 2013) and match the OE part K71-704-00 specifications.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these dust caps protect my trailer axle?\u003c\/h3\u003e\n\u003cp\u003eThe caps form a barrier that keeps grease and oil inside the axle hub while blocking dirt, water and road debris from entering. Maintaining the lubricant inside the assembly helps bearings and seals work under less stress and reduces wear on moving parts. Using fresh, properly fitting dust caps preserves drivability and minimizes the need for premature repairs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSeals grease reservoirs to reduce lubricant loss and contamination.\u003c\/li\u003e\n  \u003cli\u003ePrevents dirt and moisture ingress that can accelerate corrosion.\u003c\/li\u003e\n  \u003cli\u003eIncludes O-rings and rubber plugs to ensure a complete seal.\u003c\/li\u003e\n  \u003cli\u003eClear design allows quick visual inspection of lubricant level.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these caps fit my trailer hubs and how do I confirm compatibility?\u003c\/h3\u003e\n\u003cp\u003eThese caps are manufactured to match the K71-704-00 OE dimensions: 3.5\" thread outer diameter with 12 threads. They are specified to fit Dexter drums 8-415 produced after July 2009 and 8-430 produced after April 2013. Measure your drum's thread size and compare drum numbers or owner's manual to confirm a match before installing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3.5\" thread OD and 12-thread pitch to match OE sizing.\u003c\/li\u003e\n  \u003cli\u003eExplicitly listed for Drum No. 8-415 (post-July 2009) and 8-430 (post-April 2013).\u003c\/li\u003e\n  \u003cli\u003eCheck your drum casting number or service manual for verification.\u003c\/li\u003e\n  \u003cli\u003eContact a technician if you are unsure about hub compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the package and is installation difficult?\u003c\/h3\u003e\n\u003cp\u003eThe kit includes everything needed to replace four axle dust caps: four polycarbonate caps, four rubber plugs and four O-rings. Installation is typically a direct swap — remove the old cap, clean seating surfaces, place the O-ring and rubber plug, and thread the new cap into place until seated. No special tools are required beyond common hand tools to remove the existing cap.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e4x YUANTUO 21-88 oil bath dust caps (K71-704-00 size).\u003c\/li\u003e\n  \u003cli\u003e4x rubber plugs (46-32) to block lubrication ports when needed.\u003c\/li\u003e\n  \u003cli\u003e4x O-rings (10-163) to complete the sealing surface.\u003c\/li\u003e\n  \u003cli\u003eDesigned for straightforward, on-vehicle replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow often should I replace these dust caps and what signs indicate replacement?\u003c\/h3\u003e\n\u003cp\u003eReplace dust caps when sealing efficiency drops, when visible damage appears, or when scheduled maintenance calls for renewal. Look for cracking, deformation, deep scratches or grease leakage around the cap base; these are clear signals that the cap is no longer protecting the hub effectively. Routine replacement as part of axle maintenance helps extend the life of wheel bearings and other components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplace if the cap is cracked, warped, or scratched deeply.\u003c\/li\u003e\n  \u003cli\u003eSwap during hub servicing or if oil\/grease loss is observed.\u003c\/li\u003e\n  \u003cli\u003eRegular replacement prevents contamination and component wear.\u003c\/li\u003e\n  \u003cli\u003eUse original-fit caps to maintain correct sealing dimensions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This YUANTUO kit is intended for trailer owners, fleet managers and repair shops working on Dexter 9K\/10K axles that match the listed drum numbers and dimensions. It suits anyone seeking a complete, OE-sized replacement set — four transparent dust caps with matching plugs and O-rings — to restore proper axle lubrication and protection during routine maintenance or axle rebuilds. Always confirm drum number and thread measurements before purchasing to ensure proper fitment.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do these caps fit Dexter drum number 8-415 and 8-430?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — they fit Drum No. 8-415 (after July 2009) and 8-430 (after April 2013) when your hub matches the 3.5\" OD, 12-thread specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What parts are included in the 4-piece kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The package contains 4 dust caps (K71-704-00), 4 rubber plugs (46-32) and 4 O-rings (10-163) for full axle-end replacement.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"YUANTUO","offers":[{"title":"Default Title","offer_id":55168488407383,"sku":"B0CQM6C1SQ","price":52.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/yuantuo-front-view-dust-cap-packaging.jpg?v=1790405370","url":"https:\/\/britishgarage.co.uk\/products\/yuantuo-trailer-axle-oil-bath-dust-caps-k71-704-00-clear-polycarbonate-4-pack-3-5-od-12-thread-for-dexter-9k-10k","provider":"British Garage","version":"1.0","type":"link"}