Description
Genuine Toro 120-3335 Synchronous Belt & Idler Pulley 161-4815
📑 Table of Contents
View Sections
- Item Specifics
- Product Description
- Included Components
- Technical Overview
- Common Wear Symptoms
- Compatible Models
- Key Features
- Notes
📌 Item Specifics
- Brand: Toro
- Main Part Number: 120-3335
- Idler Pulley: 161-4815
- Superseded Part Numbers: 121-5763, 125-2532, 126-0316, 131-4506, 131-4509, 131-4529
- System Type: Synchronous Blade Drive System
- Application: TimeMaster & TurfMaster Series
- OEM Usage Start: 2012–Present
📖 Product Description
This genuine Toro 120-3335 synchronous belt paired with a 161-4815 idler pulley is designed to maintain precise blade synchronization on TimeMaster and TurfMaster mower platforms.
Toro introduced this system in 2012 and continues to use it in current production models due to its reliability and cutting performance. The belt and pulley system ensures both blades operate in perfect timing, delivering a consistent and clean cut.
Replacing worn components restores proper belt tension, eliminates vibration, and prevents uneven cutting caused by stretching belts or worn pulleys.
📦 Included Components
| Qty | Component | Part Number | Function |
|---|---|---|---|
| 1 | Synchronous Belt | 120-3335 | Maintains blade timing and synchronization |
| 1 | Idler Pulley | 161-4815 | Maintains belt tension and alignment |
🔧 Technical Overview
The synchronous drive system is critical for keeping both mower blades timed correctly during operation. The idler pulley maintains proper belt tension and alignment under load.
Failure of either component can lead to loss of synchronization, increased vibration, and reduced cutting performance.
⚠️ Common Wear Symptoms
- Uneven or streaked cutting results
- Squealing or rattling from deck area
- Belt slipping or reduced tension
- Visible pulley wear or wobble
- Loss of blade synchronization
🚜 Compatible Models
| Machine Series | Compatible Models |
|---|---|
| TimeMaster (30in / 76cm) | 20199, 20200, 20975, 20976, 20977, 20978, 21199, 21199HD, 21200, 21810, 21811 |
| TurfMaster Walk-Behind | 22200, 22205TE, 22207, 22210, 22215, 22225 |
✔ Key Features
- ✔ Genuine Toro belt and pulley components
- ✔ Maintains precise dual-blade timing
- ✔ Restores OEM cutting performance
- ✔ Reduces vibration and belt wear
- ✔ Designed for TimeMaster & TurfMaster systems
📌 Notes
Toro introduced this synchronous belt system in 2012 and continues to use it in current production models. Multiple earlier part numbers have been superseded by this updated design.
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