Technology Parts Store Craftsman 48" mower deck belt combo — 174368 & 180808 replacement belts, 5/8" width, restores blade drive

Two replacement deck belts designed to restore blade drive on Craftsman 48" mower decks: belt 174368 (5/8 x 90 OD) and belt 180808 (5/8 x 89 OD).

If your Craftsman riding mower’s blades are slipping, not engaging, or making unusual noises, a worn or damaged deck belt is often the culprit. This combo kit from Technology Parts Store contains the two specific non-OEM belts commonly used on many Craftsman 48" decks—one belt connects the electric clutch to the deck drive pulley, while the other spins the blade pulley. Because Craftsman used several belt sizes and part numbers across models, confirm your OEM number and belt dimensions before purchasing to ensure a correct fit.

How do these two belts work together on a Craftsman 48" deck?

The belts split the job of transferring engine power to the cutting blades: the primary belt (174368) links the electric clutch to the deck drive, and the secondary belt (180808) transfers rotation to the blade pulleys. When both belts are in good condition they provide efficient, consistent blade rotation.

• 174368 — primary blade drive belt, 5/8" width, 90 OD (B87) for clutch-to-deck drive.
• 180808 — blade drive belt, 5/8" width, 89 OD (B86) for pulley-to-blade rotation.
• Sold as a set of two belts to address most common deck drive failures.

How do I confirm these belts fit my mower?

Measure the existing belts and compare OEM numbers printed on your current belts or in your owner’s manual. Craftsman 48" decks used multiple belt sizes, so cross-checking the OEM reference and belt dimensions prevents ordering the wrong part.

• Compare printed OEM numbers: 174368 and 180808 are referenced here as matches.
• Measure belt width and outside circumference to match 5/8" width and 89–90 OD dimensions.
• Consult your mower’s model/year and owner manual for belt specifications when in doubt.

What should I expect during installation and performance?

Installation typically requires removing the deck, releasing belt tension, and routing each belt around pulleys per the deck routing diagram. Properly tensioned belts reduce slipping and noise and restore consistent blade engagement—but avoid forcing a belt over damaged pulleys or misaligned spindles.

• Follow your mower’s deck routing diagram for correct belt path and tensioning points.
• Inspect pulleys, idlers, and spindles for wear before installing new belts.
• New belts may stretch slightly after first hours of use; recheck tension and alignment.

Are these OEM belts and what does that mean for warranty or fit?

These are aftermarket replacement belts and not OEM-manufactured parts; OEM numbers are provided solely to help you identify compatible belts. Aftermarket belts commonly match OEM dimensions and function, but check fitment carefully and keep your original OEM references if you prefer factory parts.

• Not an OEM product—OEM numbers included for cross-reference only.
• Meets the specified width and outside diameter to match common Craftsman 48" decks.
• Sold as a convenience combo to replace both primary and blade drive belts at once.

Who is this for: This belt combo is intended for DIY owners and lawn-care technicians working on Craftsman riding mowers with 48" decks who need a quick replacement for worn or broken deck belts. It’s ideal for users who have verified their mower’s OEM references or measured existing belts and want two replacement belts in one kit to restore blade drive performance. If you prefer factory-branded components, use the OEM numbers to source original parts.