UDC Parts GX20006 UC30568 Drive Belt Replacement for John Deere D140 D110 D130 L110 L130 L120 LA135 D140 LA145 LA115 L111 L118 D125 LA120 D170 LA130 LA110 /Powertrain Drive Belt Aramid Cord/ 88.90 in

What It Is

This is a replacement drive belt for the powertrain (not the mower deck) on select John Deere lawn tractors, connecting the engine pulley to the transmission. Designed for 42-inch and 48-inch deck models, it’s a direct aftermarket replacement for OEM part UC30568.

Fitment & Compatibility

Check your model and deck size. This belt fits John Deere D100, D110, D120, D125, D130, D140, D170, L100, L110, L111, L118, L120, L130, LA105, LA110, LA115, LA120, LA125, LA130, LA135, LA140, LA145, and LA150 series. Not all models in these series use the same belt—verify your tractor’s deck size (42” or 48”) and that your OEM part number is UC30568, GX20006, or M147227. Measure your old belt’s length (this one is 88.90 inches) and check the width (1/2 inch). Aftermarket belts can vary slightly; if your tractor has a tensioner spring, ensure it’s not worn out before installing.

Key Things to Know

• Aramid cord construction is stronger than standard rubber belts, offering better heat resistance and longer life under load.
• Installation is moderate DIY—you’ll need to remove the mower deck and sometimes the belt guard. No special tools required, but a second person helps with tension.
• Common gotcha: The belt routing diagram on your tractor’s frame may differ from the one in the box. Snap a photo of the old belt’s path before removing it.
• Check pulley condition—worn or rough pulleys can shred a new belt quickly. Also verify the tensioner idler pulley spins freely.

Should You Buy It

If your John Deere tractor’s drive belt is slipping, squealing, or frayed, this is a solid, budget-friendly replacement with proven reliability (12,000+ reviews). It’s best for DIY owners who want a durable belt without paying OEM markup—just confirm your model and measure your old belt first.