UDC Parts 120-9470 Traction Belt Replacement for Toro TimeMaster 21199 20199 21200 20200 20975 20976 20977 20978 21199HD 21220 21810 21811 21816 21491 21876 Walk Behind Mowers/Aramid Cord/ 27.5 inch

What It Is

This is a replacement traction drive belt (27.5 inches) for Toro TimeMaster walk-behind mowers. It transfers power from the engine to the transmission, controlling forward/reverse travel—essential for self-propelled models.

Fitment & Compatibility

• Compatible models: Toro TimeMaster 21199, 20199, 21200, 20200, 20975, 20976, 20977, 20978, 21199HD, 21220, 21810, 21811, 21816, 21491, 21876. Also fits 30-inch TimeMaster decks (most models listed above are 30-inch).
• Check your deck size: Only fits 30-inch TimeMaster decks—not 22-inch, 24-inch, or other Toro models.
• OEM vs aftermarket: This is an aftermarket belt (Aramid cord). OEM part number is 120-9470. Cross-check your mower’s manual or existing belt for that number.
• Measurements: 27.5 inches outer circumference, 1/2 inch width, 30 degree angle. Verify these against your old belt.

Key Things to Know

• Quality: Aramid cord construction is stronger than standard rubber—good for high-torque self-propelled use. Most users report it lasts as long as OEM.
• Installation difficulty: Moderate. Requires removing the deck belt and possibly the pulley cover. Have a socket set and a belt tool or pry bar handy.
• Common gotcha: The belt must be routed correctly around idler pulleys—check a diagram online or take a photo before removal. A wrong route causes slipping or no drive.
• Noise: A few users note a slight squeak on initial use; usually settles after a few minutes of operation.

Should You Buy It

Yes, if you need a reliable, cost-effective replacement for a worn or broken traction belt on a Toro TimeMaster 30-inch mower. It’s a solid aftermarket alternative to OEM at roughly half the price, with good durability for residential use. Not for commercial heavy-duty use or non-TimeMaster models.