UDC Parts 918-06977A Spindle Assembly / 46 inch Deck/Replacement for MTD 490-130-C014 618-06977A 618-06977 Cub Cadet LT46 LX46 Craftsman 20442 Pro Lawn Tractor

What It Is

The UDC Parts 918-06977A is a spindle assembly for 46-inch mower decks, designed to replace worn or broken spindles on MTD, Cub Cadet, and Craftsman lawn tractors. It drives the blade rotation and is critical for a clean, even cut.

Fitment & Compatibility

• Deck size: Only for 46-inch decks. Measure your deck width before buying.
• Direct OEM replacement: Fits MTD 490-130-C014, 618-06977A, and 618-06977. Also replaces Cub Cadet (LT46, LX46) and Craftsman 20442 Pro models.
• Check spindle height and bolt pattern: This unit uses a 5/8-inch shaft and a 4-bolt mounting pattern (2.75-inch center-to-center). Measure your old spindle’s height from mounting base to pulley shoulder—this one is roughly 3.5 inches tall.
• Housing diameter: Approximately 2.25 inches. Verify it clears your deck’s spindle pocket.
• Bearing type: Sealed ball bearings (non-serviceable). No grease fittings.

Key Things to Know

• Quality: Good aftermarket option at ~$33. Users report it’s comparable to OEM for a fraction of the cost. Some note the bearings feel slightly less smooth than OEM, but still last 2-3 seasons with normal use.
• Installation: Moderate difficulty—need a wrench set, socket for the pulley nut, and possibly a puller for the old spindle. No special tools beyond that. Replace one spindle at a time to avoid mixing up pulley alignment.
• Common gotcha: The pulley nut is reverse-threaded on many MTD/Cub decks. Confirm your deck’s thread direction before tightening to avoid stripping.
• Deck compatibility: Not for 42-inch or 50-inch decks. Ensure your model uses a 46-inch stamped steel deck (not fabricated).

Should You Buy It

Buy this if you have a 46-inch MTD, Cub Cadet, or Craftsman tractor with a worn or noisy spindle and want a reliable, budget-friendly replacement. It’s ideal for DIY homeowners who don’t need OEM branding. Skip it if you need a greasable spindle or have a fabricated/zero-turn deck.