Mower Spindle Assembly 106-3217, 119-8599, 108-7713, Fits for Toro 60 72 inch Deck Z500 Z553 Z557 Z560 D587 L595 Z589 Z595-D Z588

What It Is

This is a replacement spindle assembly for select Toro zero-turn mowers with 60- or 72-inch cutting decks. It houses the spindle shaft and bearings that drive the mower blade; a failed spindle causes blade wobble, vibration, or a non-spinning blade.

Fitment & Compatibility

• Brand/Model: Fits Toro Z500, Z553, Z557, Z560, D587, L595, Z589, Z595-D, Z588 series – primarily commercial/estate zero-turn mowers.
• Deck Size: Works with 60-inch and 72-inch decks only. Measure your deck width before ordering.
• OEM Cross-Reference: Replaces Toro OEM numbers 106-3217, 119-8599, and 108-7713. Check your existing spindle for a stamped part number.
• Physical Check: Measure spindle shaft diameter (typically 1 inch) and overall housing bolt pattern (usually 3-bolt with 3.5-inch spacing). Compare to your current spindle.
• Note: Not compatible with 42-, 48-, or 50-inch decks, nor with non-Toro mowers without adapter plates.

Key Things to Know

• Quality: Aftermarket part; reviews indicate it works well for the price, but some users note bearing life may be shorter than OEM (1-2 seasons vs 2-3).
• Installation: Moderate difficulty – you’ll need a socket set, torque wrench, and possibly a puller to remove the old spindle. No special tools beyond that.
• Common Gotcha: The spindle may come without a blade bolt or lock washer – reuse your old ones or buy new separately.
• Check Deck Condition: Worn belt pulleys or bent blade adapters can cause premature spindle failure. Inspect while you’re replacing.

Should You Buy It

Buy this if you have a compatible Toro zero-turn with a 60- or 72-inch deck, want a cost-effective replacement over OEM (often $80–$100), and are comfortable with a moderate DIY install. Skip it if you need longer bearing life for heavy commercial use or if your deck has additional damage that warrants a full service kit.