Description
Overview:
The Trigger Interlock for Husqvarna 435 chainsaws (Manufacturer Part Number 579239401) is a genuine Husqvarna safety component that works with the throttle trigger to prevent accidental activation. Moulded from hard-wearing polymer for long service life, it forms part of the handle assembly and must be engaged before the trigger can be pulled. This helps reduce unintended throttle engagement during handling, starting, or repositioning. Designed specifically for Husqvarna petrol chainsaws, it is a direct-fit replacement for models including the 435 and 135, restoring smooth, reliable operation when the original interlock is worn or damaged. Supplied as a single replacement part, it is suitable for routine maintenance or repair and supports safe, consistent control of your saw in domestic, professional, and site conditions.
Key Features:
- Genuine Husqvarna part for assured fit and function on listed models
- Durable moulded polymer construction resists wear and impact in daily use
- Prevents unintended throttle activation for safer handling and starting
- Precision-fit geometry for reliable engagement with the trigger mechanism
- Stable operation under vibration and temperature changes typical of chainsaw work
- Straightforward to install with basic hand tools during routine maintenance
- Direct replacement for worn or broken interlocks to restore safety compliance
- Compatible with multiple Husqvarna 100- and 400-series homeowner and ranch-class saws
Typical Applications:
Used to replace a cracked, worn, or missing trigger interlock on Husqvarna chainsaws so the throttle can only be engaged intentionally. Suitable for regular servicing, refurbishment of second-hand machines, and preventative maintenance to maintain safe starting, felling, limbing, and cutting tasks in gardens, estates, landscaping, and light forestry work.
Also known as:
Throttle interlock, throttle lockout, trigger safety latch, safety trigger lock, throttle safety lever, operator presence interlock, handle safety catch.
Fits Models:
135, 135E, 140, 140E, 435, 435EII, 435II, 440EII, 440II
Alternate Part Numbers:
579 23 94-01, 579239401
Product Specifications
| L&S Part No. | 579 23 94 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 579239401 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Key Features | - Genuine Husqvarna part ensures fit on listed models - Moulded polymer construction resists wear and impact - Prevents unintended throttle activation for safer handling - Direct replacement for worn interlocks restores safety - Compatible with Husqvarna 100- and 400-series chainsaws |
| Fits Models | 135 | 135E | 140E | 435EII | 435II | 440EII | 440II |
