JYLEYJ Spindle Assembly for 46-inch Mower Decks — Direct-Fit 918-05078a Replacement, Sealed Bearings

This heavy-duty spindle assembly replaces worn or damaged original equipment (OEM) parts 918-05078a, 618-05078a, 918-05078 and 618-05078 to bring your mower deck back to reliable operation. Engineered for residential and light-commercial zero-turn mowers, the unit matches bolt patterns and shaft dimensions used across a range of 46-inch decks so you can swap it in without major modification.

Will this spindle fit my Cub Cadet RZT-L46 or RZT-S46?

Yes — the spindle is made to be compatible with most 46-inch Cub Cadet RZT series decks, including RZT-L46, RZT-S46, RZT-LX46 and RZT-SX46 models. It follows the OEM mounting and pulley shaft specs so alignment and belt routing remain unchanged.

• Replaces OEM numbers 918-05078a, 618-05078a, 918-05078, 618-05078
• Fits 46-inch RZT and ZT1 Cub Cadet decks
• Matches original bolt pattern and shaft diameter for straightforward swap

Is this compatible with Troy-Bilt, Craftsman and Murray 46-inch decks?

This spindle assembly is compatible with several makes and models beyond Cub Cadet, including Troy-Bilt Z46, Mustang 46, Craftsman Z6400/Z530, and Murray M200-46 decks. Compatibility covers the common spindle mounting layout used across these brands for 46-inch mower decks.

• Works with Troy-Bilt Z46 and 46XP models
• Compatible with Craftsman Z6400 and Z530 deck assemblies
• Designed to fit Murray M200-46 and similar Columbia ZT-S46 decks

How durable and serviceable is the JYLEYJ spindle assembly?

The assembly uses robust materials and sealed bearings to withstand routine mowing loads and resist contamination from grass and debris. When maintenance or replacement is needed, the unit is constructed for accessible installation and long-term serviceability.

• Heavy-duty housing and spindle shaft for durability
• Sealed bearings to reduce dirt ingress and extend service life
• Designed for straightforward bolt-on replacement to minimize downtime

What if the part doesn’t fit or fails after installation?

JYLEYJ provides a one-year after-sales service policy to address fitting or functional issues reported after purchase. Contact support with model details and photos if you run into installation difficulties or early component failures.

• One-year coverage for fitting and functional concerns
• Customer support available for fit verification and troubleshooting
• Keep OEM numbers and mower model handy when contacting support

Who is this for: The JYLEYJ 918-05078a / 618-05078a spindle assembly is intended for homeowners, landscapers and service shops working on 46-inch zero-turn mower decks from Cub Cadet, Troy-Bilt, Craftsman and Murray. If your mower shows uneven cutting, unusual vibration from the deck, or visible spindle damage, this replacement restores deck geometry and blade support so you can return to efficient, even cutting.