TimeCutter Traction Drive Cogged Belt for Toro 139-2399 74683 74685 74687 74690 74691 74694 74695

What It Is

This is the traction drive cogged belt for Toro TimeCutter zero-turn mowers. It transfers power from the engine to the hydrostatic pumps, controlling forward/reverse movement—not the cutting deck.

Fitment & Compatibility

Before buying, confirm your mower model uses one of these OEM part numbers: 139-2399, 74683, 74685, 74687, 74690, 74691, 74694, or 74695. This belt fits TimeCutter models with 42-inch, 50-inch, and 60-inch decks (e.g., TimeCutter SS4225, SS5000, Z4200, Z5000). Check your owner’s manual or the existing belt’s part number. The belt measures 1/2 inch wide x 92.7 inches long (cogged type). Aftermarket versions may be cheaper but measure length carefully—slight differences cause slipping or poor tension.

Key Things to Know

• Quality: OEM Toro belt is aramid-reinforced; aftermarket belts may wear faster or stretch.
• Installation difficulty: Moderate—requires removing the deck and rear fender pan. Have a belt routing diagram handy.
• Common gotcha: The belt must be routed around both pump pulleys and the engine pulley, with tensioner spring correctly engaged. Misrouting causes immediate slip or breakage.
• Lifespan: Expect 200–400 hours depending on usage; inspect for cracks or glazing annually.

Should You Buy It

Buy this if you need a direct OEM replacement for a Toro TimeCutter traction drive belt. It’s a fair price for factory fit and durability. If you’re comfortable with aftermarket parts and want to save a few dollars, measure carefully and read reviews—but OEM is the safest bet for reliable traction.