2 Pack GY20785 Spindle Assembly for John Deere L100 L110 L111 Deck | Replace John Deere GY20785 GY20050, GX20367 Pulley for John Deere L105 L107 L108 L118 1642HS L17.542 L1742 42" Lawn Tractors

What It Is

This is a 2-pack of aftermarket spindle assemblies designed for John Deere 42-inch mower decks found on L100, L110, L111, and similar lawn tractors. Each spindle connects the blade to the deck pulley system, enabling blade rotation for cutting grass.

Fitment & Compatibility

• Deck Size: Only fits 42-inch mower decks. Measure your deck or check the model number (e.g., “42” in L17.542).
• Compatible Models: John Deere L100, L110, L111, L105, L107, L108, L118, 1642HS, L17.542, L1742. Also fits other 42" deck tractors using GY20785 or GY20050 spindles.
• OEM Cross-References: Replaces John Deere GY20785, GY20050, and GX20367 pulley. Verify your existing spindle part number before ordering.
• Critical Check: Measure the bolt pattern center-to-center (typically 2.875" for this series) and ensure the pulley diameter matches your deck (usually 4.5"). Mismatch can cause belt slippage or blade contact issues.

Key Things to Know

• Quality: Aftermarket spindles often use sealed bearings vs. OEM greaseable ones. Sealed bearings are less maintenance but may wear faster under heavy use.
• Installation: Moderate difficulty. Requires removing the deck, pulling the old spindle (often rusted), and transferring the pulley and blade. A wrench, socket set, and penetrating oil are essential.
• Common Gotcha: The pulley (GX20367) is included but may have a different center hole size than your original. Check the shaft diameter (usually 5/8" or 3/4") and pulley offset to avoid belt alignment issues.
• 2-Pack Value: Buying two spindles at once is cost-effective if both need replacement. However, if only one is worn, you’ll have a spare.

Should You Buy It

Buy this if you have a John Deere 42-inch deck tractor (L100 series or similar) and need to replace one or both spindles due to wobble, noise, or blade damage. It’s a solid aftermarket option at a good price for DIY repairs, but verify pulley specs and bolt pattern first to avoid returns.