50 inch Deck Rebuild Kit for MT D Cub Cad et White Outdoor ZT50 RZT50 Includes 3 Spindles 618-04126 618-04126A 3 Blades 742-04053 490-110-C123 1 Be lt 754-04044

What It Is

This 50-inch deck rebuild kit provides the three spindles, three blades, and one belt needed to restore cutting performance on select MTD, Cub Cadet, and White Outdoor zero-turn mowers with a 50-inch fabricated deck, specifically the ZT50 and RZT50 series.

Fitment & Compatibility

Before buying, confirm your mower has a 50-inch fabricated deck (not a stamped deck). Check your model number against the MTD/Cub Cadet/White Outdoor ZT50 or RZT50 series. The included spindles (OEM 618-04126/618-04126A) and blades (OEM 742-04053/490-110-C123) are direct aftermarket replacements for those part numbers. The belt (OEM 754-04044) is specific to this deck’s drive system. Measure your existing spindle housing and blade length (nominally 16.5 inches) to verify physical fit. Do not assume it fits all 50-inch decks—non-MTD brands or older models may differ.

Key Things to Know

• Quality: Aftermarket spindles and blades may be slightly less durable than OEM. Check reviews for bearing life—some users report premature wear if you mow heavy grass or debris.
• Installation difficulty: Moderate. You’ll need basic hand tools, a jack to lift the mower, and a torque wrench for spindle bolts (typically 30-40 ft-lbs). Plan 2-3 hours.
• Gotcha: The belt routing is critical—take a photo before removal. Improper routing causes slipping or premature wear.
• Blade balance: Aftermarket blades often need balancing out of the box. Use a blade balancer to avoid vibration and spindle damage.

Should You Buy It

Buy this kit if you want a single purchase to refresh your 50-inch ZT50/RZT50 deck and save money over buying OEM parts individually. Skip it if you need OEM-grade longevity for commercial use or if your deck is a different brand—fitment is narrow to these specific MTD/Cub Cadet/White Outdoor zero-turn models.