4pcs Axle Cap Bearing Cover Replace for Jo hn Deere Series Lawn Mower Tractors M143338

What It Is

These four axle cap bearing covers (OEM part M143338) seal the outer ends of lawn mower spindle housings, keeping grease in and dirt, grass clippings, and moisture out. Designed for John Deere series lawn tractors and zero-turn mowers, they prevent premature spindle bearing failure.

Fitment & Compatibility

Before buying, confirm your mower uses spindle part number M143338 (not M143337 or other variants). This set fits many John Deere 100 and 300 series lawn tractors, plus select zero-turn models (e.g., Z225, Z245, Z425, Z445). It also works on some older Sabre and Scotts models with the same spindle design. Measure your existing cap’s outer diameter—these are roughly 1.5 inches across. If your deck uses a different spindle (e.g., stamped steel with a plastic cap), these won’t fit. The M143338 is a direct OEM replacement, not a universal part.

Key Things to Know

• Quality is decent for the price—these are basic stamped steel caps with a rubber seal. They match OEM specs but may not be as durable as John Deere genuine parts in heavy commercial use.
• Installation is easy—just pry off the old cap (often rusted on) and tap the new one into place with a hammer and a block of wood. No special tools needed.
• Common gotcha: The old cap’s retaining ring or clip may be missing or broken. If the new cap doesn’t snap in snugly, the spindle may need a new retaining ring (sold separately).
• Grease before installing—pack a small amount of lithium grease inside the cap to protect the bearing. Many DIYers skip this and get premature failure.

Should You Buy It

If you own a compatible John Deere lawn tractor or zero-turn and your spindle caps are rusted, cracked, or missing, this is a cheap, easy fix. It’s best for homeowners doing basic maintenance—not for heavy commercial use where genuine John Deere caps offer slightly better corrosion resistance. For $6.39, it’s a no-brainer if your spindle shafts are otherwise in good shape.