UDC Parts 954-04077A Deck Belt Replacement for Cub Cadet LT1050 50 Inch XT1 LT50 SLT1550 954-04077 754-04077 754-04077A MTD Troy Bilt Super Bronco XP50 Craftsman Toro 112-0332 / Aramid Cord / 134 in

What It Is

This is a 134-inch aramid cord replacement deck belt designed for 50-inch cutting decks on select Cub Cadet, MTD, Troy-Bilt, Craftsman, and Toro lawn tractors. It drives the mower blades from the engine pulley.

Fitment & Compatibility

Before buying, confirm your deck size is exactly 50 inches—this belt does not fit 42-inch or 46-inch decks. Check your current belt’s part number: this replaces OEM numbers 954-04077, 954-04077A, 754-04077, 754-04077A, and Toro 112-0332. Models it fits include Cub Cadet LT1050, XT1 LT50, SLT1550, Troy-Bilt Super Bronco XP50, and Craftsman with 50-inch decks. Measure your old belt length (134 inches) and verify the belt routing path—some decks require a specific twist or wrap around idler pulleys. Always compare the belt cross-section (usually 1/2 inch wide) with your original.

Key Things to Know

• Aramid cord construction is stronger than standard rubber belts—expect longer life under heavy grass or frequent use, but it may be slightly stiffer initially.
• Installation is moderate difficulty—you’ll need to release the belt tension by removing the deck or using a tensioner tool. Study your deck diagram before starting.
• Common gotcha: if the belt is too tight or too loose after install, check that you routed it correctly around all pulleys and tensioner. A misrouted belt will cause poor cutting or rapid wear.
• Aftermarket alternative—this UDC part is a direct replacement for OEM belts, often costing less. Quality is comparable, but inspect for any burrs on the belt edges before installing.

Should You Buy It

If you need a reliable, budget-friendly replacement for a 50-inch deck on a compatible Cub Cadet, MTD, or Troy-Bilt tractor, this belt is a solid choice. It’s best for DIY owners comfortable with basic deck maintenance who want aramid durability without paying OEM prices. Skip it if your deck is a different size or you need a belt for a zero-turn mower.