UDC Parts GX25628 Deck Belt Replacement for John Deere 42 Inch Z335E Z345M Z345R Z315E Z335M Z320M Z320R ZTrak Zero-Turn Mowers/Aramid Cord / 118.626 inches

What It Is

The UDC Parts GX25628 is an aftermarket aramid cord replacement deck belt for John Deere 42-inch ZTrak zero-turn mowers. It drives the cutting blades via the deck spindle system and is designed for residential and light commercial mowing.

Fitment & Compatibility

• Measure first: The belt is 118.626 inches long (also listed as 118-5/8") with a 1/2-inch width. Verify your current belt length before ordering—measuring the old belt or the deck belt path is the only way to be sure.
• Model check: Fits John Deere Z335E, Z345M, Z345R, Z315E, Z335M, Z320M, Z320R, and ZTrak zero-turn mowers with a 42-inch deck. Not for 48-inch or 54-inch decks.
• OEM cross-reference: Replaces John Deere OEM part numbers GX25628, GX20072, and AM141295. Aftermarket belt—not genuine John Deere, but aramid cord construction for durability.
• Deck type: Works only with the standard 42-inch stamped deck. Does not fit fabricated or Accel Deep decks.

Key Things to Know

• Aramid cord vs. standard: Aramid (Kevlar-like) fiber resists stretching and heat better than standard rubber belts. This belt is stronger than many OEM replacement belts but may be slightly stiffer during installation.
• Installation difficulty: Moderate. You’ll need to remove the deck (or at least the belt guard) and release the idler pulley tension. A belt tensioner tool or long pry bar helps. Expect 20-40 minutes.
• Common gotcha: Incorrect belt routing is the #1 issue. Look up routing for your specific model—John Deere manuals are free online. Running the belt on the wrong side of a pulley will cause slipping or blade disengagement.
• No pulley change needed: Replaces the belt only. Check for worn idler pulleys or spindles at the same time—worn pulleys kill any belt quickly.

Should You Buy It

Yes, if you want a durable, budget-friendly alternative to the OEM John Deere belt for a 42-inch ZTrak mower. It’s a solid value at $26.77 with strong reviews, but verify your belt length and routing before installing. Avoid if you prefer genuine OEM parts for warranty reasons or if your pulleys are worn.