2 Pack 918-06976A Spindle Assembly with 756-05034A Idler Pulley 954-05021 Deck Belt 1/2x100 Replace 618-06976A for Cub Cadet 42" XT1 LT42, XT2 LX42, T7800, T8000, LT42 XT1 Super Bronco Mowers

What It Is

This is a 3-piece replacement kit for Cub Cadet 42-inch lawn tractors: two spindle assemblies (918-06976A), one idler pulley (756-05034A), and a 1/2x100 deck belt (954-05021). It’s designed for mowing decks on XT1, XT2, T-Series, and Super Bronco models.

Fitment & Compatibility

Before buying, verify:

• Deck size: Fits only 42-inch cutting decks. Measure from blade tip to blade tip.
• Model series: Confirmed for Cub Cadet XT1 LT42, XT2 LX42, T7800, T8000, and LT42 XT1 Super Bronco. Not for 46-inch or 50-inch decks.
• OEM cross-reference: Replaces OEM parts 618-06976A (spindle), 756-05034A (pulley), and 954-05021 (belt). Check your deck’s spindle bolt pattern and pulley diameter (3.5 inch idler).
• Belt spec: Belt is 1/2 inch wide x 100 inches long. Measure your old belt end-to-end to confirm.

Key Things to Know

• Installation difficulty: Moderate. Requires basic hand tools (socket wrench, pry bar) and about 30-60 minutes. You’ll need to remove the deck, unbolt old spindles, and re-route the belt.
• Quality: Aftermarket but solid. Spindles come pre-greased with sealed bearings. Some users report the belt runs slightly tighter than OEM—check tension after installation.
• Common gotcha: The idler pulley uses a 5/8 inch bore. Ensure your existing bolt or shoulder bolt matches. If not, you may need to reuse your old hardware.
• Deck removal required: You can’t swap spindles with the deck on the mower. Plan to lift or slide the deck out.

Should You Buy It

If you own a 42-inch Cub Cadet XT1, XT2, or T-Series and need to replace worn spindles (wobbling blades, noise) or a stretched/snapped belt, this kit is a cost-effective one-stop fix. It’s not for other deck sizes or brands. For the price, it beats buying each part separately, but double-check your deck model number before ordering.