ACEBRI 618-0624 618-0659 Spindle Assembly 918-0624 918-0659 618-04456 618-04461 42 Inch for Cub Cadet LT1040 LT1042 for MTD RZT42 LT542G LT542H for Toro LX420 LX425

What It Is

This is a replacement spindle assembly for the 42-inch cutting decks on select Cub Cadet, MTD, and Toro lawn tractors. It houses the bearings and pulley that drive the blade, making it a direct fix for a wobbly, noisy, or non-spinning blade.

Fitment & Compatibility

Measure first. This spindle fits 42-inch decks only. Check your deck’s spindle bolt pattern (center-to-center) and shaft diameter (typically 3/4-inch or 1-inch). Common OEM cross-references include 618-0624, 618-0659, 918-0624, 918-0659, 618-04456, and 618-04461.
Brands/models that use this:

• Cub Cadet: LT1040, LT1042, LT542G, LT542H
• MTD: RZT42
• Toro: LX420, LX425
  Verify your model number—many 42-inch decks use different spindles. If your deck has a stamped steel housing with a single grease fitting, this is likely the correct part. If your deck is fabricated (welded), it may require a different assembly.

Key Things to Know

• Quality: Aftermarket, not OEM. Most users report it matches OEM specs and runs smoothly, but inspect the bearings for pre-greasing before installation.
• Installation difficulty: Moderate. You’ll need a socket set, a breaker bar, and possibly a puller to remove the old spindle. Expect 30–60 minutes per spindle.
• Common gotchas: The pulley bolt is reverse-threaded on some models—check your old spindle before forcing anything. Also, the spindle shaft can seize in the deck housing; penetrating oil and heat help.
• No grease fitting included: This spindle may not have a zerk fitting. If your old one did, you’ll need to add grease manually during installation or plan for shorter bearing life.

Should You Buy It

Buy this if you have a 42-inch Cub Cadet, MTD, or Toro tractor with a stamped deck and a failed spindle, and you want a budget-friendly replacement that works. Skip it if you need an OEM part for warranty or a fabricated deck.