8TEN Blade Spindle Belt Idler Rebuild Kit for Craftsman 48 Inch Deck GT5000 532173921 33908 532174368 532177968

What It Is

This rebuild kit replaces the blade spindle belt idler assembly on Craftsman 48-inch decks found on GT5000 and similar garden tractors. It keeps belt tension consistent so the blades spin properly—essential for clean, even cuts on larger lawns.

Fitment & Compatibility

Deck size: 48-inch (must confirm your deck is exactly 48" – measure from blade tip to blade tip, not the housing).
Model fit: Compatible with Craftsman GT5000, GT6000, DYT4000, and select Husqvarna/Poulan Pro models using a 48-inch fabricated deck.
OEM cross-reference: Replaces Craftsman part numbers 532173921, 33908, 532174368, and 532177968.
What to check before buying:

• Verify your deck has a single idler pulley arm (not dual).
• Compare the spindle bolt pattern – this kit uses a 5/8" hex shaft and 1/4" bolt holes.
• Measure the idler pulley diameter (stock is 3.5"). If yours is different, this kit won’t align.
• This is an aftermarket kit – not OEM, but built to OEM specs.

Key Things to Know

• Quality: Mixed reviews – some report bearings lasting 1-2 seasons, others get premature failure. Not as durable as OEM, but half the price.
• Installation: Moderate difficulty – you’ll need a socket set, torque wrench, and possibly a puller for stubborn pulleys. Expect 1-2 hours.
• Gotcha: The included bolts may be slightly too long – check clearance against the deck housing and trim if needed.
• Belt alignment: After install, manually rotate the spindle to confirm the belt tracks straight. Misalignment will cause rapid wear or belt toss.

Should You Buy It

Buy this kit if you need a budget-friendly fix for a worn idler on your 48-inch Craftsman deck and are comfortable doing the labor yourself. Skip it if you want OEM longevity or have a different deck size – the fitment is narrow. For occasional home use, it’ll get you cutting again without breaking the bank.