3 Pack Pre-Greased 918-06978 Spindle Assembly with 756-05034A Idler Pulley 954-04329A Belt 490-900-M061 Deck Wash Kit Replace 618-06978 for Cub Cadet ZT1 54, ZT2 54, RZT L 54, RZT S54 Mowers

What It Is

This is a 3-pack of pre-greased spindle assemblies (replaces OEM 618-06978) bundled with an idler pulley (756-05034A), a drive belt (954-04329A), and a deck wash kit (490-900-M061). It’s designed for 54-inch Cub Cadet ZT1, ZT2, RZT L, and RZT S54 zero-turn mowers, providing a complete deck service kit.

Fitment & Compatibility

• Deck size: Only fits 54-inch cutting decks. Measure your deck width to confirm.
• Mower models: Cub Cadet ZT1 54, ZT2 54, RZT L 54, RZT S54. Check your model number on the chassis tag—not just the series name.
• OEM vs aftermarket: This is an aftermarket set, not genuine Cub Cadet. The spindle part number 918-06978 replaces OEM 618-06978. The belt and pulley match OEM specs but verify belt length (954-04329A = ~93.5 inches) and pulley diameter (4 inches) against your old parts.
• What to check: Remove one spindle and measure the bolt pattern (usually 3-bolt, 3.5-inch spacing) and shaft diameter (typically 5/8 inch). Ensure your deck has a wash port for the kit.

Key Things to Know

• Pre-greased spindles save time, but check grease quality—some aftermarket spindles use light grease that may need re-packing after a season.
• Installation difficulty: Moderate. Requires basic wrenches, a socket set, and possibly a puller for stuck spindles. Expect 1-2 hours for the full swap.
• Belt routing: The included belt must match your deck’s idler pulley layout. Snap a photo of the old belt path before removal to avoid confusion.
• Common gotcha: The deck wash kit’s barbed fitting may need thread sealant to prevent leaks—Teflon tape works.

Should You Buy It

Buy this kit if you need to replace worn spindles (noisy, wobbling, or leaking grease) and want a one-stop set for a 54-inch Cub Cadet zero-turn. It’s a solid value for DIY maintenance, especially if your belt and idler are also due. Skip it if you prefer genuine Cub Cadet parts for exact fit or if your deck size or model isn’t listed—verify compatibility first.