[Lifetime Warranty] 120-9470 Drive Belt Replacement - Fits Toro TimeMaster 21199 20199 21200 20200 20975 20976 20977 20978 21199HD 21220 21810 21811 21816 21491 21876 Walk Behind Mowers | 27.5"
120-9470 replacement drive belt for Toro TimeMaster lawn mowers with branded packaging sleeve.
120-9470 drive belt specifications chart showing dimensions for Toro TimeMaster mower replacement parts.
120-9470 drive belt replacement for Toro TimeMaster lawn mowers with 3L27.5 size label detail.
Infographic guide for selecting the correct 120-9470 drive belt for Toro TimeMaster walk-behind mowers.
120-9470 drive belt for Toro TimeMaster mowers with compatibility chart and maintenance information.
120-9470 replacement drive belt for Toro TimeMaster mowers showing aramid fiber construction and material specifications.
120-9470 replacement drive belt for Toro TimeMaster mowers shown with symptoms of mower failure.
120-9470 replacement drive belt for Toro TimeMaster mowers, showing performance comparison and 3L27.5 belt specifications.
Installation guide for 120-9470 drive belt showing pulley and tensioner maintenance tips for Toro TimeMaster mowers.
120-9470 replacement drive belt for Toro TimeMaster lawn mowers with branded packaging sleeve.
120-9470 drive belt specifications chart showing dimensions for Toro TimeMaster mower replacement parts.
120-9470 drive belt replacement for Toro TimeMaster lawn mowers with 3L27.5 size label detail.
Infographic guide for selecting the correct 120-9470 drive belt for Toro TimeMaster walk-behind mowers.
120-9470 drive belt for Toro TimeMaster mowers with compatibility chart and maintenance information.
120-9470 replacement drive belt for Toro TimeMaster mowers showing aramid fiber construction and material specifications.
120-9470 replacement drive belt for Toro TimeMaster mowers shown with symptoms of mower failure.
120-9470 replacement drive belt for Toro TimeMaster mowers, showing performance comparison and 3L27.5 belt specifications.
Installation guide for 120-9470 drive belt showing pulley and tensioner maintenance tips for Toro TimeMaster mowers.
Lifetime Warranty

[Lifetime Warranty] 120-9470 Drive Belt Replacement - Fits Toro TimeMaster 21199 20199 21200 20200 20975 20976 20977 20978 21199HD 21220 21810 21811 21816 21491 21876 Walk Behind Mowers | 27.5"

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120-9470 Drive Belt Replacement (27.5")

Key Features

  • Type: Traction Drive V-Belt
  • Length: 27.5 inches
  • Width: 3/8 inch
  • Material: Constructed with high-strength materials for durability and wear resistance.

Replaces / Cross-Reference Part Numbers

  • Toro: 120-9470
  • Exmark: 120-9470

Compatibility & Fitment

  • Brand: Toro
  • Model Series: TimeMaster 30-inch Walk-Behind Mowers
  • Fits Models: 20199, 20200, 20975, 20976, 20977, 20978, 21199, 21199HD, 21200, 21220, 21491, 21810, 21811, 21816, 21876

When to Replace

  • Visible signs of wear such as cracking, fraying, glazing, or missing sections.
  • Loss of power to the drive wheels or noticeable belt slippage.
  • Inconsistent mower speed or engagement.
  • Belt has become stretched or damaged.

Installation Tips

  • Disconnect the spark plug before starting any maintenance.
  • Refer to the owner's manual for your specific mower model for detailed replacement instructions.
  • Ensure all pulleys are clean and free from debris before installing the new belt.
  • Check for proper routing and tension after installation to ensure optimal performance.

FAQ

This belt fits Toro TimeMaster 30-inch walk-behind mower models 20199, 20200, 20975, 20976, 20977, 20978, 21199, 21199HD, 21200, 21220, 21810, 21811, 21816, 21491, and 21876. It is used as the traction/drive belt on TimeMaster units, so the safest match is to confirm your mower's model number and verify that it uses part 120-9470.
This replacement matches Toro part number 120-9470. In listings and service references, this part is commonly described as the TimeMaster traction belt, traction drive belt, or transmission drive belt.
The 120-9470 belt is the traction drive belt. It transfers power to the self-propel/traction system, driving the transmission so the mower can move under its own power. If the blades still spin normally but the mower will not self-propel correctly, this is one of the first belts to inspect.
Typical symptoms include weak or no self-propel drive, slipping when the traction system is engaged, intermittent movement, reduced pulling power on inclines, squealing from the drive area, or a belt that looks cracked, glazed, frayed, stretched, or oil-soaked. On TimeMaster mowers, a worn traction belt can also cause delayed engagement when you try to drive forward.
For most DIY owners, this is a moderate repair. Expect roughly 30 to 60 minutes depending on your mower's condition and your experience. Typical tools include a socket set or nut driver, wrenches, pliers, and work gloves. You will usually need access under the belt cover and drive area, so cleaning built-up grass beforehand helps a lot. Always disconnect the spark plug wire before starting service.
The most common causes are normal wear, heat, repeated engagement under heavy load, debris packed around the pulleys, pulley misalignment, and belt contamination from oil or grease. On self-propel systems, a belt can also wear faster if an idler pulley is sticking, the transmission is binding, or the mower is frequently used on steep terrain.
Before installing the new belt, inspect the idler pulley, transmission pulley, belt guides, spring tension, and pulley grooves for wear or damage. Remove any packed grass or debris from the drive area. If the old belt failed prematurely, check for seized pulleys or misalignment; replacing the belt alone may not solve the problem if another drive component is causing excess drag.