618-06976 918-06976 Spindle Assembly Fit for 42 inch Deck Cub Cadet XT1 LT42 XT2 LX42 XT1-LT42 XT2-LX42 CYT4220 SE Craftsman T8000 Lawn Mower Replaces OEM MTD 618-06976A 918-06976A

What It Is

This spindle assembly (part #618-06976 / 918-06976) is the rotating hub that drives the mower blade on 42-inch deck Cub Cadet XT1, XT2, LX42, and Craftsman T8000 series lawn tractors. It replaces worn or failed OEM MTD spindles (618-06976A, 918-06976A) to restore cutting performance.

Fitment & Compatibility

Before buying, verify your deck is a true 42-inch (not 46 or 50) and that your model is one of these: Cub Cadet XT1 LT42, XT2 LX42, XT1-LT42, XT2-LX42, CYT4220 SE, or Craftsman T8000. Measure the spindle housing diameter (2.5 inches typical) and bolt pattern (3-bolt, 4.5-inch center-to-center). This is an aftermarket part, so it may differ slightly in finish from OEM—check that the shaft length (approx. 3.5 inches) and pulley bore (1/2-inch) match your existing setup. Avoid assuming compatibility based on deck size alone; verify your model number on the tractor’s data tag.

Key Things to Know

• Quality: Aftermarket, not OEM—most users report it’s durable for residential use, but may lack the same bearing seal quality as MTD originals. Expect 1-2 seasons of heavy mowing.
• Installation: Moderate difficulty. You’ll need a socket set, torque wrench (tighten bolts to 30-35 ft-lbs), and a puller to remove the old spindle pulley. Grease the bearings before installation.
• Common Gotchas: The pulley may not align perfectly with the belt—check belt tension after install. If the spindle housing is bent or deck is warped, this part won’t fix vibration. Always replace all three spindles if one fails to avoid uneven wear.
• Warranty: Typically 90 days to 1 year from seller—keep proof of purchase.

Should You Buy It

If you have a 42-inch Cub Cadet or Craftsman T8000 with a failed spindle and want a budget-friendly fix for residential mowing, this is a solid choice. It’s not built for commercial use or extreme abuse, but for the price, it’s a reliable replacement that gets the job done.