{"product_id":"reliable-aftermarket-parts-spindle-assembly-for-toro-z-master-z400-z500-direct-fit-bearings-preinstalled","title":"Reliable Aftermarket Parts Spindle Assembly for Toro Z Master Z400\/Z500 — Direct-Fit, Bearings Preinstalled","description":"\u003cp\u003e\u003cstrong\u003eReliable Aftermarket Parts 107-8504 spindle assembly is a direct-fit replacement spindle built to restore cutting performance on Toro Z Master Z400 and Z500 series zero-turn mowers.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen a worn or damaged spindle leaves your mower deck wobbling, vibrating, or leaving uneven cuts, replacing the spindle assembly is often the fastest, most cost-effective repair. This replacement unit matches the original dimensions and mounting points for Toro models in the 400 and 500 families, giving you a like-new deck rotation without sourcing used parts or lengthy waits.\u003c\/p\u003e\n\n\u003ch3\u003eWill this spindle fit my Toro Z Master mower?\u003c\/h3\u003e\n\u003cp\u003eYes — this assembly is made to fit numerous Toro Z Master deck configurations. It fits specified 400 and 500 series models that share the same spindle geometry and bolt pattern, and it replaces the OEM numbers listed for cross-compatibility.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible Toro models: 400, 410, 450, 500, 528, Z400, Z410, Z441, Z449, Z450, Z453\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for part numbers: 107-8504, 1078504, 14703, 285-881\u003c\/li\u003e\n  \u003cli\u003eMatches original outer diameter and height for correct blade clearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the 107-8504 spindle assembly restore deck performance?\u003c\/h3\u003e\n\u003cp\u003eReplacing a failing spindle removes wobble and uneven rotation that cause scalloped or inconsistent cuts. This aftermarket assembly restores stable blade mounting and concentric rotation so blades maintain the correct cutting plane.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRestores correct blade alignment and balance\u003c\/li\u003e\n  \u003cli\u003eReduces vibration that accelerates wear on blades and deck\u003c\/li\u003e\n  \u003cli\u003eRe-establishes factory blade-to-deck clearance for even mowing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the key specifications and installation details?\u003c\/h3\u003e\n\u003cp\u003eThe assembly is sized to match factory dimensions and uses standard mounting hardware and bearings. Basic mechanical skills and common shop tools are typically all that’s needed for installation; follow torque specs and inspect blades and deck components while replacing the spindle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOuter diameter (OD): 9 3\/8\" for correct fit in spindle bore\u003c\/li\u003e\n  \u003cli\u003eHeight: 7-1\/2\" to preserve blade clearance and drive belt alignment\u003c\/li\u003e\n  \u003cli\u003eSupplies: One new spindle assembly included — bearings and seals preinstalled\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre there any maintenance tips after installation?\u003c\/h3\u003e\n\u003cp\u003eAfter fitting the new spindle, check belt tension, blade balance, and torque on all mounting bolts after the first hour of operation. Periodic inspection and lubrication where applicable will extend service life and maintain cutting quality.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRe-torque mounting bolts after initial run-in hours\u003c\/li\u003e\n  \u003cli\u003eInspect belts and blades for wear to prevent premature spindle stress\u003c\/li\u003e\n  \u003cli\u003eKeep the deck clean and free of built-up material around the spindle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This spindle assembly is aimed at owners, small landscaping businesses, and maintenance shops working on Toro Z Master Z400 and Z500 series zero-turn mowers that need a reliable, OEM-compatible replacement part. If you want a ready-to-install unit that restores deck stability and cutting accuracy without sourcing used components, this part provides a straightforward repair option.\u003c\/p\u003e\n\n\u003cp\u003eFeatures summary:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOne new replacement spindle assembly\u003c\/li\u003e\n  \u003cli\u003eFits Toro mower models: 400, 410, 450, 500, 528, Z400, Z410, Z441, Z449, Z450, Z453\u003c\/li\u003e\n  \u003cli\u003eOuter diameter: 9 3\/8\"\u003c\/li\u003e\n  \u003cli\u003eHeight: 7-1\/2\"\u003c\/li\u003e\n  \u003cli\u003eReplaces part numbers: 107-8504, 1078504, 14703, 285-881\u003c\/li\u003e\n\u003c\/ul\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: Does this spindle fit Toro Z400 and Z500 models?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It fits listed Toro models including Z400 and Z500 series that match the spindle geometry and OEM part numbers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are bearings and seals included?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The assembly arrives preassembled with bearings and seals installed for immediate fitment.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Reliable Aftermarket Parts","offers":[{"title":"Default Title","offer_id":56839749435732,"sku":"B07YCSZK56","price":144.41,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/reliable-aftermarket-107-8504-front-view-spindle.jpg?v=1787068332","url":"https:\/\/gardenluxe.co.uk\/products\/reliable-aftermarket-parts-spindle-assembly-for-toro-z-master-z400-z500-direct-fit-bearings-preinstalled","provider":"Gardenluxe Uk","version":"1.0","type":"link"}