918-04456 Spindle for 42" Deck MTD Tr oy-Bilt Mower - 618-04456 Spindle Assembly for Tr oy-Bilt Pony B ronco Tractor, Toro LX425 LX420 Lawn Tractor, Yard Machines , Replace 918-04456B 918-04461 2 pack

What It Is

This is a replacement spindle assembly for 42-inch cutting decks on select MTD, Troy-Bilt, Toro, and Yard Machines lawn tractors. It houses the bearing and pulley that drive the mower blade, and it comes as a two-pack to replace both spindles on a standard two-blade deck.

Fitment & Compatibility

Before buying, verify your deck size is exactly 42 inches (measured cutting width) and that your mower model is one of these: Troy-Bilt Pony or Bronco tractor, Toro LX425 or LX420, or a Yard Machines tractor with a 42-inch deck. Also check that your existing spindle matches the 918-04456, 918-04456B, or 918-04461 OEM numbers. Measure the spindle shaft diameter (typically 5/8 inch) and the bolt pattern (usually 3 inches center-to-center) to confirm fit. This is an aftermarket part, not OEM, so it may vary slightly in finish or bearing quality.

Key Things to Know

• Installation difficulty: Moderate. You’ll need basic tools (socket set, jack, possibly a puller) and about 1–2 hours per side. Watch a video for your specific deck design.
• Common gotcha: The spindle may come with different grease fittings or no grease pre-installed. Grease the bearings before mounting to extend life.
• Quality note: At ~$25 per spindle, this is a budget option. Some users report shorter bearing life (1–2 seasons) compared to OEM, but it works fine for home use.
• Deck removal: You may need to remove the mower deck to access spindles easily. Mark belt routing before disassembly.

Should You Buy It

If you own one of the listed tractors with a 42-inch deck and need a quick, affordable replacement for worn or noisy spindles, this two-pack is a solid value. It’s best for homeowners who can handle basic mechanical work and don’t need commercial-duty longevity. For frequent heavy use or a professional landscape operation, consider OEM spindles for longer service life.