{"product_id":"dexter-k23-398-00-k23-399-00-hydraulic-uni-servo-brake-7x1-75","title":"Dexter 7\" x 1-3\/4\" Hydraulic Uni-Servo Brake Assembly — K23-398-00 (LH) \/ K23-399-00 (RH)","description":"\u003cp\u003eGenuine Dexter 7\" x 1-3\/4\" \u003cstrong\u003eHydraulic Uni-Servo\u003c\/strong\u003e brake assembly — a complete, factory-assembled brake unit for 2,000–2,200 lb trailer axles with \u003cstrong\u003esurge (hydraulic) brake actuators\u003c\/strong\u003e. Available in \u003cstrong\u003eLeft Hand (K23-398-00)\u003c\/strong\u003e or \u003cstrong\u003eRight Hand (K23-399-00)\u003c\/strong\u003e. This single-plunger uni-servo design delivers responsive, smooth braking on boat trailers, snowmobile trailers, and light-duty utility trailers. Made in the USA by Dexter Axle — the industry standard in trailer braking systems.\u003c\/p\u003e\n\n\u003cp\u003e🔧 \u003cstrong\u003eSelect Your Side\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eChoose \u003cstrong\u003eLeft Hand (LH \/ Driver Side)\u003c\/strong\u003e or \u003cstrong\u003eRight Hand (RH \/ Passenger Side)\u003c\/strong\u003e from the dropdown above. Single-axle trailers need one of each; tandem-axle trailers need a pair of each. Always replace brakes in matching pairs for even wear.\u003c\/p\u003e\n\n\u003ch3\u003e⚙️ Key Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Dexter OEM – Made in USA:\u003c\/strong\u003e factory-quality replacement with exact-fit backing plate, shoes, wheel cylinder, hardware, and adjuster plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUni-Servo Single-Plunger Design:\u003c\/strong\u003e smooth, progressive hydraulic braking — designed for use with surge brake actuators (NOT electric brake controllers)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Size:\u003c\/strong\u003e 7\" drum diameter × 1-3\/4\" shoe width\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 2,200 lbs per assembly \/ 2,500 lbs per pair\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Bolt Mounting Pattern:\u003c\/strong\u003e 4\" diagonal, 2-3\/4\" stud spacing — bolts included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits 10\" to 13\" Wheels:\u003c\/strong\u003e standard fit for most light-duty trailer wheel sizes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Adjustment:\u003c\/strong\u003e adjuster plug covers access hole to keep dirt out — periodic adjustment required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Assembled:\u003c\/strong\u003e backing plate, shoes, wheel cylinder, springs, and mounting hardware — ready to bolt on\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e📐 Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Dexter Axle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDexter Part Numbers:\u003c\/strong\u003e K23-398-00 (Left Hand) \/ K23-399-00 (Right Hand)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDexter Assembly Numbers:\u003c\/strong\u003e 023-398-00 (LH) \/ 023-399-00 (RH)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrake Type:\u003c\/strong\u003e Hydraulic Uni-Servo (single plunger)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrum Size:\u003c\/strong\u003e 7\" × 1-3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAxle Rating:\u003c\/strong\u003e 2,000–2,200 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e 4-bolt pattern (4\" diagonal \/ 2-3\/4\" stud spacing)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWheel Fitment:\u003c\/strong\u003e 10\" to 13\" wheels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e🔄 Cross Reference \u0026amp; Compatible Parts\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurge Brake Actuators:\u003c\/strong\u003e Dexter BP04-050 and similar hydraulic coupler \/ actuators\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Bearing \u0026amp; Seal Kits:\u003c\/strong\u003e L44649 inner \/ 10-9 outer \/ 10-60 grease seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Hub\/Drum:\u003c\/strong\u003e Dexter 8-257-5UC3 (5 on 4.5) — pre-greased EZ-Lube version available\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e🔧 Common Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBoat trailers (2,000–2,200 lb capacity)\u003c\/li\u003e\n\u003cli\u003eSmall utility \u0026amp; snowmobile trailers with surge brake systems\u003c\/li\u003e\n\u003cli\u003eSmall enclosed cargo trailers with hydraulic braking\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e⚠️ \u003cstrong\u003eImportant:\u003c\/strong\u003e This is a HYDRAULIC brake — requires a surge brake actuator or master cylinder. For ELECTRIC brake systems, use Dexter K23-026-00 (LH) \/ K23-027-00 (RH) instead.\u003c\/p\u003e\n\n\u003cp\u003e💡 \u003cstrong\u003ePro Tip:\u003c\/strong\u003e After installation, bleed the hydraulic brake lines thoroughly and adjust brake shoes through the access plug on the backing plate. Re-adjust after first 200 miles of use.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQuestions?\u003c\/strong\u003e Call or text AAA Trailer at \u003cstrong\u003e517-225-1991\u003c\/strong\u003e — we stock Dexter, Lippert, Ultra-Fab, and TruRyde brakes, hubs, and running gear. Same-day shipping from Howell, Michigan.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e📞 Call\/Text: 517-225-1991   🌐 AAATrailer.com\u003c\/strong\u003e\u003c\/p\u003e","brand":"Detroit Hitch","offers":[{"title":"Left Hand (LH)","offer_id":52558671642933,"sku":"856-0398","price":119.0,"currency_code":"USD","in_stock":false},{"title":"Right Hand (RH)","offer_id":52558671675701,"sku":"856-0399","price":119.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0733\/9144\/0181\/files\/856-0398-856-0399-pair-composite.jpg?v=1776872109","url":"https:\/\/aaatrailer.com\/products\/dexter-k23-398-00-k23-399-00-hydraulic-uni-servo-brake-7x1-75","provider":"AAA Trailer","version":"1.0","type":"link"}