Description
Genuine Toro 120-3335 Synchronous Belt & 2 161-4815 Idler Pulleys TimeMaster TurfMaster
📑 Table of Contents
- Item Specifics
- Product Description
- Included Components
- Technical Overview
- Common Wear Symptoms
- Compatible Models
- Key Features
- FAQ
📌 Item Specifics
- Brand: Toro
- Main Part Numbers: 120-3335, 161-4815
- Type: Synchronous Belt & Idler Pulley Assembly
- Application: TimeMaster & TurfMaster Walk-Behind Mowers
- Superseded Part Numbers: 121-5763, 125-2532, 126-0316, 131-4506, 131-4509, 131-4529
- Usage Start Year: 2012–Present
📖 Product Description
This genuine Toro synchronous belt and idler pulley assembly is designed to maintain precise blade timing and drive performance in TimeMaster and TurfMaster mowers.
Over time, the idler pulley system and synchronous belt are subject to wear due to constant tension, heat, and operational load. When these components wear, the system can lose synchronization, leading to reduced cutting performance and uneven blade operation.
Replacing both the belt and idler pulley together ensures proper timing, smoother operation, and restores OEM-level performance.
📦 Included Components
| Qty | Component | Part Number | Function |
|---|---|---|---|
| 1 | Synchronous Drive Belt | 120-3335 | Maintains blade timing and synchronized cutting operation |
| 2 | Idler Pulley | 161-4815 | Maintains belt tension and alignment during operation |
🔧 Technical Overview
The synchronous belt system is responsible for keeping dual-blade timing aligned in Toro TimeMaster and TurfMaster platforms. The idler pulley maintains correct belt tension and alignment throughout operation.
Failure in either component can disrupt blade synchronization and reduce mowing efficiency.
⚠️ Common Wear Symptoms
- Uneven or missed cutting patterns
- Noise from deck belt area
- Belt slipping or loss of tension
- Visible pulley wear or wobble
- Reduced cutting performance
🚜 Compatible Models
| Category / Machine Series | Compatible Models |
|---|---|
| TimeMaster 30in (76cm) Mowers | 20199, 20200, 20975, 20976, 20977, 20978, 21199, 21199HD, 21200, 21810, Mo21811 |
| TurfMaster Walk-Behind Mowers | 22200, 22205TE, M22207, 22210, 22215, 22225 |
✔ Key Features
- ✔ Genuine Toro OEM components
- ✔ Maintains blade synchronization
- ✔ Restores proper belt tension
- ✔ Designed for TimeMaster & TurfMaster systems
- ✔ Improves cutting consistency
- ✔ Long-lasting durability
❓ FAQ
Why replace both belt and pulley?
They wear together, and replacing both ensures proper system performance.
What happens if the belt fails?
Loss of blade timing, reduced cutting efficiency, or complete drive failure.
Is this OEM Toro?
Yes, genuine Toro replacement parts.
We at Red Rock Turf are a stocking distributor for Briggs and Stratton, Kohler, Kawasaki and Toro. We don’t only sell their OEM parts we also use them on our equipment repairs and rebuilds. If there is something you need and don’t see it, then please feel free to get a hold of us, call or text 435-213-5854.
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