{"product_id":"yuantuo-trailer-axle-oil-bath-dust-caps-kit-4pc-clear-polycarbonate-3-5-thread-12-tpi-for-dexter-9k-10k-axles","title":"YUANTUO Trailer Axle Oil Bath Dust Caps Kit — 4pc Clear Polycarbonate, 3.5\" Thread (12 TPI) for Dexter 9K–10K Axles","description":"\u003cp\u003e\u003cstrong\u003eYUANTUO K71-704-00 oil bath dust caps are transparent polycarbonate seals designed to fit Dexter trailer drum assemblies (3.5\" thread, 12-thread pitch) and are sold as a 4-piece maintenance kit with plugs and O-rings.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit replaces worn or damaged axle dust caps on compatible Dexter 9,000–10,000 lb axles, helping retain lubricant inside the hub and protecting bearings and seals from contamination. Made from clear, durable polycarbonate, each kit includes four 21-88 oil bath caps plus four rubber plugs and four O-rings so you can install them right away. Confirm compatibility with your drum number and manufacturing date before ordering to ensure a proper fit.\u003c\/p\u003e\n\n\u003ch3\u003eWill these dust caps fit my trailer hub?\u003c\/h3\u003e\n\u003cp\u003eThese caps match specific Dexter drum models produced after certain dates; they are not universal. Verify the drum part number and production date stamped on your drum before purchasing to make sure of a correct fit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with Drum Number 8-415 manufactured after July 2009.\u003c\/li\u003e\n  \u003cli\u003eCompatible with Drum Number 8-430 manufactured after April 2013.\u003c\/li\u003e\n  \u003cli\u003eOE size references: K71-704-00, 3.5\" thread outer diameter, 12-thread pitch.\u003c\/li\u003e\n  \u003cli\u003eSold as a 4-piece kit with extra plugs and O-rings for full axle service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do these caps protect my axle and bearings?\u003c\/h3\u003e\n\u003cp\u003eThe caps create a secure oil-bath seal that helps keep grease or oil inside the hub while preventing water, dirt, and road debris from entering. That protection minimizes wear on bearings, races, and internal seals and supports longer component life when installed and maintained properly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOil-bath design retains lubricant inside the axle housing for consistent lubrication.\u003c\/li\u003e\n  \u003cli\u003eCovers the hub opening to block contaminants and moisture intrusion.\u003c\/li\u003e\n  \u003cli\u003eIncludes O-rings for improved sealing and rubber plugs for venting or filling points.\u003c\/li\u003e\n  \u003cli\u003eClear material allows visual inspection of lubricant level without removal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and parts are included in the kit?\u003c\/h3\u003e\n\u003cp\u003eThe components are chosen for durability and straightforward installation. The caps are molded from transparent polycarbonate and the kit ships with matching rubber plugs and O-rings so you can replace all wear items in one service interval.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFour transparent polycarbonate 21-88 oil bath caps (colorless appearance).\u003c\/li\u003e\n  \u003cli\u003eFour 46-32 rubber plugs for fill\/vent ports or secondary sealing.\u003c\/li\u003e\n  \u003cli\u003eFour 10-163 O-rings to ensure a tight, leak-resistant seat.\u003c\/li\u003e\n  \u003cli\u003eDesigned for direct-fit installation—no custom machining required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen should I replace these dust caps?\u003c\/h3\u003e\n\u003cp\u003eReplace caps as soon as sealing performance declines or physical damage appears. Routine inspection during wheel service will help you spot cracks, deformation, or major wear that indicate it's time for replacement.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplace if visible cracks, deep scratches, or deformation are present.\u003c\/li\u003e\n  \u003cli\u003eSwap during scheduled maintenance when seals or bearings are serviced.\u003c\/li\u003e\n  \u003cli\u003eReplace at the end of the expected service life or if lubricant leakage is detected.\u003c\/li\u003e\n  \u003cli\u003eRegular replacement prevents contamination and extends component life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This YUANTUO K71-704-00 4-piece oil bath cap kit is intended for trailer owners, fleet maintenance teams, and DIY mechanics working on Dexter 9K–10K axles who need a direct-fit replacement for compatible drum numbers. If you perform regular axle servicing, want a clear cap for quick visual checks, or need a simple, complete kit with plugs and O-rings, this product provides an immediate solution. Always confirm drum part numbers and production dates to ensure compatibility before installation.\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 all Dexter axles?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. They fit Dexter Drum 8-415 (after July 2009) and 8-430 (after April 2013); verify drum number and date before buying.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What comes in the kit?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The kit includes four 21-88 oil caps, four 46-32 rubber plugs, and four 10-163 O-rings ready for installation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"YUANTUO","offers":[{"title":"Default Title","offer_id":48082979192990,"sku":"B0CQM6C1SQ","price":57.81,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/yuantuo-front-packaging-cap-kit.jpg?v=1785821540","url":"https:\/\/northtrailauto.ca\/products\/yuantuo-trailer-axle-oil-bath-dust-caps-kit-4pc-clear-polycarbonate-3-5-thread-12-tpi-for-dexter-9k-10k-axles","provider":"North Trail Auto","version":"1.0","type":"link"}