99-4640 Spindle Assembly Fits Toro Z Master Z252 Z253 Z255 Z287 L 62" Mower Deck Replaces 82-676 285-971

What It Is

This is a replacement spindle assembly for the 62-inch mower decks on Toro Z Master Z252, Z253, Z255, and Z287 L zero-turn mowers. It houses the bearings and shaft that spin the mower blade, and it directly replaces OEM part numbers 82-676 and 285-971.

Fitment & Compatibility

Before buying, confirm your deck is the 62-inch model (not 60” or 72”). This spindle fits Toro Z Master Z252, Z253, Z255, and Z287 L models with the 62” deck only. It is an aftermarket replacement for OEM part 99-4640 (also listed as 82-676 and 285-971). Measure the mounting bolt pattern (typically 3-bolt, 2.75” center-to-center) and shaft diameter (usually 3/4” or 1”). Check your existing spindle’s height—this one is standard height for the 62” deck. If your deck is a different size or you have a non-Toro brand, this spindle will not fit.

Key Things to Know

• Quality: Aftermarket replacement; reviews are limited (2 ratings at 5.0) but positive. Expect solid construction, but verify bearing quality if you run heavy commercial hours.
• Installation Difficulty: Moderate. Requires removing the blade, belt, and pulley, then unbolting the old spindle. You’ll need a socket set, torque wrench, and possibly a puller for stubborn pulleys.
• Common Gotchas: Spindle housings can be seized from rust—apply penetrating oil before removal. Ensure the deck is lifted and supported safely. Re-torque blade bolts to spec (typically 70-90 ft-lbs for Toro). Use thread locker on spindle mounting bolts.
• Lubrication: Some spindles have grease fittings; this one may not. If it’s sealed, no maintenance is needed—replace when bearings fail.

Should You Buy It

If you own a Toro Z Master with a 62-inch deck and need a direct-fit replacement at a reasonable price, this is a solid choice. It’s best for homeowners or light commercial use where OEM pricing is prohibitive. For heavy commercial use, consider OEM for potentially longer bearing life.