50 Inch Mower Deck Rebuild Kit for Cub Cadet RZT-50 LT1050 Troy Bilt, 3 Spindle 918-04125C 918-04126b, 3 Blade 742-04053, 3 Idler Pulley 756-04129, 4 Deck Wh EEL 753-04856, 1 Belt 754-04044

What It Is

This is a complete 50-inch mower deck rebuild kit for Cub Cadet RZT-50, LT1050, and select Troy-Bilt models. It includes three blades, three spindle assemblies, three idler pulleys, four deck wheels, and one belt—everything needed to refresh a worn-out cutting deck in one purchase.

Fitment & Compatibility

Before buying, confirm your mower has a 50-inch deck and uses these specific part numbers: spindle 918-04125C/918-04126B, blade 742-04053, idler pulley 756-04129, deck wheel 753-04856, and belt 754-04044. This kit fits Cub Cadet RZT-50 (2010 and later), LT1050, and some Troy-Bilt models with a 3-spindle design. Cross-check your mower’s model number against the kit’s parts list—aftermarket kits may vary slightly in belt length or spindle bearing quality. Measure your deck’s blade bolt pattern (center hole to center hole) to ensure the 742-04053 blades match; they typically use a 1-inch center hole and 5/8-inch spindle bolt.

Key Things to Know

• Quality vs OEM: These are aftermarket parts; blades may be slightly lighter than OEM, and spindle bearings may have shorter lifespan. Expect 1-2 seasons of heavy use before needing replacement.
• Installation difficulty: Moderate. Requires removing the deck, unbolting old spindles, pulleys, and wheels. A socket set, torque wrench (spindle bolts to 40-50 ft-lbs), and jack/stands help. Plan 2-3 hours.
• Common gotchas: The belt may be slightly tighter than OEM—adjust tension carefully to avoid pulley wear. Deck wheels often use different bolt patterns; check if your deck uses 5/16-inch or 3/8-inch bolts. Lubricate spindle bearings before install.
• Missing hardware: Kit includes parts but not bolts or washers for spindles/wheels; reuse old hardware or buy separately.

Should You Buy It

Buy this if you own a Cub Cadet RZT-50 or LT1050 with a 50-inch deck and want a convenient, budget-friendly way to restore cutting performance and reduce vibration. It’s ideal for DIYers comfortable with moderate mechanical work. Skip it if you need OEM-grade durability for commercial use or if your deck has severe rust/damage—those issues require a new deck shell, not just a rebuild kit.