GX20286 GX20287 V-Idler Pulley & Flat Pulley Kit/Drive Belt Idler Kit for J-OHN Deere Mower Decks LA100 LA105 LA110 LA115 LA120, Replaces 1760097, 690409, 690409MA.

What It Is

This is a replacement V-idler pulley and flat pulley kit designed to tension and guide the drive belt on John Deere lawn mower decks. It’s for maintaining proper belt routing and preventing slippage on residential tractor decks.

Fitment & Compatibility

Check your mower’s model number (e.g., LA100, LA105, LA110, LA115, LA120) and deck size—this kit fits 42-inch and 48-inch decks on those series. It replaces OEM parts 1760097, 690409, and 690409MA. Before buying, measure the pulley diameter (roughly 3.5 inches for the V-idler and 4 inches for the flat) and confirm the center hole size (typically 5/8 inch). If your deck uses a different belt tensioning system (e.g., spring-loaded vs. fixed), verify the pulley spacing matches your original setup. This kit is aftermarket, not genuine John Deere, so check bolt thread pitch (usually 3/8-16) to avoid stripping.

Key Things to Know

• Quality: Made from stamped steel with a sealed bearing; acceptable for residential use but may wear faster than OEM under heavy or commercial use.
• Installation: Moderate difficulty—requires removing the deck belt, old pulleys, and reassembling with a wrench and socket. No special tools needed.
• Common gotchas: The flat pulley may have a slightly different offset than the original, which can cause belt misalignment if your deck is bent or worn. Also, the bearing is non-serviceable; replace the whole pulley when worn.
• Check belt condition: If the old pulley failed, inspect the drive belt for cracks or glazing—replace both at the same time to avoid premature wear.

Should You Buy It

This kit is a solid budget choice for DIY homeowners with a John Deere LA-series tractor who need to fix a noisy or slipping belt. It’s not for commercial mowers or those wanting OEM durability, but for occasional use and the price, it reliably restores tension and routing.