{"product_id":"hydro-gear-lip-seal-fits-mtd-cub-cadet-craftsman-replaces-51161-50735","title":"Hydro Gear Lip Seal – Fits MTD, Cub Cadet, Craftsman (Replaces 51161, 50735)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eHydro Gear replacement lip seal\u003c\/strong\u003e is engineered for use in Hydro-Gear hydraulic pumps, specifically the BDA, BDP-10A, PE, PG, PJ, and PK Series. It is a vital component for various riding lawn tractors and outdoor power equipment manufactured by MTD, Cub Cadet, Craftsman, Troy Bilt, Bolens, and White Outdoors.\u003c\/p\u003e\n\u003cp\u003eThis part offers direct interchange with Hydro Gear part numbers 51161 and 50735, as well as Husqvarna 583039301.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for direct replacement, ensuring a precise fit.\u003c\/li\u003e\n\u003cli\u003eConstructed from durable polyethylene for reliable pump shaft sealing.\u003c\/li\u003e\n\u003cli\u003ePackage includes two seals to have a spare on hand.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHydro Gear\u003c\/td\u003e\n        \u003ctd\u003e51161\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHydro Gear\u003c\/td\u003e\n        \u003ctd\u003e50735\u003c\/td\u003e\n      \u003c\/tr\u003e\n        \u003ctr\u003e\n        \u003ctd\u003eHusqvarna\u003c\/td\u003e\n        \u003ctd\u003e583039301\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm your pump model in the tables below.\u003c\/p\u003e\n\u003cp\u003eThis seal is compatible with several series of Hydro-Gear hydraulic pumps.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Hydro-Gear Pump Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eEquipment Type\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHydro-Gear\u003c\/td\u003e\n        \u003ctd\u003eBDA Series\u003c\/td\u003e\n        \u003ctd\u003eHydraulic Pumps\u003c\/td\u003e\n        \u003ctd\u003e51161, 50735\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHydro-Gear\u003c\/td\u003e\n        \u003ctd\u003eBDP-10A Series\u003c\/td\u003e\n        \u003ctd\u003eHydraulic Pumps\u003c\/td\u003e\n        \u003ctd\u003e51161, 50735\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHydro-Gear\u003c\/td\u003e\n        \u003ctd\u003ePE Series\u003c\/td\u003e\n        \u003ctd\u003eHydraulic Pumps\u003c\/td\u003e\n        \u003ctd\u003e51161, 50735\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHydro-Gear\u003c\/td\u003e\n        \u003ctd\u003ePG Series\u003c\/td\u003e\n        \u003ctd\u003eHydraulic Pumps\u003c\/td\u003e\n        \u003ctd\u003e51161, 50735\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eHydro-Gear\u003c\/td\u003e\n        \u003ctd\u003ePJ Series\u003c\/td\u003e\n        \u003ctd\u003eHydraulic Pumps\u003c\/td\u003e\n        \u003ctd\u003e51161, 50735\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eHydro-Gear\u003c\/td\u003e\n        \u003ctd\u003ePK Series\u003c\/td\u003e\n        \u003ctd\u003eHydraulic Pumps\u003c\/td\u003e\n        \u003ctd\u003e51161, 50735\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe following brands utilize Hydro-Gear transmissions that are compatible with this seal.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Compatible Equipment Brands\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eEquipment Type\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eHusqvarna\u003c\/td\u003e\n        \u003ctd\u003eVarious Models\u003c\/td\u003e\n        \u003ctd\u003e583039301\u003c\/td\u003e\n        \u003ctd\u003eCross-referenced part number\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eHydraulic Lip Seal\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003e17 x 40 x 7 mm (Inner Diameter x Outer Diameter x Width)\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003ePolyethylene (PE)\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eBlack\u003c\/dd\u003e\n  \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003e0.025 kg (0.88 oz)\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eFor hydraulic pump shaft sealing applications\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Hydro Gear Lip Seal (Replaces 51161, 50735)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eEnsure the equipment is powered off and the hydraulic system is safely depressurized before starting work.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean the area around the old seal to prevent dirt and debris from entering the pump.\u003c\/li\u003e\n  \u003cli\u003eCarefully remove the worn seal with a seal puller or appropriate tool, taking care not to scratch the shaft or housing bore.\u003c\/li\u003e\n  \u003cli\u003eInspect the shaft and housing for any grooves, burrs, or wear; polish away imperfections with a fine-grit emery cloth if needed.\u003c\/li\u003e\n  \u003cli\u003eLightly lubricate the inner and outer surfaces of the new lip seal with clean hydraulic fluid.\u003c\/li\u003e\n  \u003cli\u003ePosition the new seal squarely over the housing opening and gently press it into place using a seal driver or a socket with a matching outer diameter. Ensure even pressure.\u003c\/li\u003e\n  \u003cli\u003eReassemble all components, refill hydraulic fluid to the correct level, and run the equipment while checking for any leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if this lip seal will fit my mower?\u003c\/summary\u003e\n  \u003cp\u003eThis seal is designed for specific Hydro-Gear pump series: BDA, BDP-10A, PE, PG, PJ, and PK. To confirm fitment, check your pump's model number and cross-reference the OEM part number. This part replaces Hydro Gear 51161, 50735, and Husqvarna 583039301.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of a failing hydraulic seal?\u003c\/summary\u003e\n  \u003cp\u003eThe most common sign is a hydraulic fluid leak around the pump shaft. Other indicators can include a noticeable loss of transmission power, unusual whining sounds from the pump, or sluggish hydraulic performance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should I replace these seals?\u003c\/summary\u003e\n  \u003cp\u003eThere is no fixed replacement interval. Seals should be replaced whenever you observe signs of leakage or damage. It is also good practice to replace them during any major transmission or pump overhaul to ensure system integrity.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I install this seal myself?\u003c\/summary\u003e\n  \u003cp\u003eWhile DIY installation is possible for those with strong mechanical skills and the correct tools (like a seal puller and driver), we recommend professional installation. This ensures the seal is seated correctly without damaging the seal, shaft, or housing, preventing premature failure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50717906141499,"sku":"3813R","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/3813R.png?v=1762938076","url":"https:\/\/seasierra.com\/products\/hydro-gear-lip-seal-fits-mtd-cub-cadet-craftsman-replaces-51161-50735","provider":"SeaSierra","version":"1.0","type":"link"}