2 Pack 918-04426 Spindle Assembly with 756-3089 Pulley 756-0627B Idler Pulley 748-3065 Spindle Spacer Replaces Cub Cadet 918-3129C 918 04426 918-04217 618-04426 618-3129A 618-3129B 618-3129C

What It Is

This is a 2-pack of spindle assemblies with a pulley, idler pulley, and spacer—designed to replace the rotating hub that drives the mower blades on Cub Cadet zero-turn and lawn tractors. It’s for decks needing spindle rebuilds due to worn bearings, bent shafts, or seized pulleys.

Fitment & Compatibility

Before buying, confirm your deck model and serial number. This set fits Cub Cadet models using 918-04426, 918-3129C, 918-04217, 618-04426, 618-3129A, 618-3129B, or 618-3129C spindles. Common decks: 48", 50", 54" fabricated or stamped decks on RZT, Z-Force, and LTX series (e.g., RZT 50, Z-Force S 48). Measure your existing spindle shaft diameter (typically 0.75" or 1") and bolt pattern (usually 4-hole, 3.5" center-to-center). The included 756-3089 pulley and 756-0627B idler pulley are specific to certain belt routing—check your deck’s pulley size (approx. 4.5" OD for the spindle pulley) and idler bearing width. Not compatible with older IH or MTD decks without verifying hole spacing.

Key Things to Know

• Quality vs OEM: This is an aftermarket set—bearings may be sealed but less durable than genuine Cub Cadet. Rated 4.6/5, but only 3 reviews; inspect for casting burrs before install.
• Installation difficulty: Moderate. Requires removing deck, belt, and blade. You’ll need a socket set, torque wrench (blade bolts ~70-90 ft-lbs), and possibly a puller for seized pulleys. Allow 1-2 hours per spindle.
• Common gotchas: The spacer (748-3065) must be placed correctly between the spindle housing and deck to avoid blade contact. Idler pulley bearing may be noisier than OEM—grease it before use. Mixing with old pulleys can cause belt misalignment.
• What’s included: 2 spindle assemblies (each with housing, shaft, bearings), 2 pulleys, 2 idler pulleys, 2 spacers. No hardware (bolts, lock washers) included.

Should You Buy It

If you have a Cub Cadet with a common 48-54" deck and need a budget-friendly spindle rebuild for one or two spindles, this 2-pack saves time and money over buying singles. It’s a solid choice for DIYers comfortable with moderate mechanical work, but if you want maximum longevity or have a high-use commercial mower, stick with genuine Cub Cadet spindles.