Description
Overview:
This Brake Spring is a genuine Husqvarna replacement component for the chain brake mechanism on petrol chainsaws, including the 455 Rancher and 450E. Built to OEM specification from durable spring steel, it provides the correct return tension so the brake engages and releases reliably when the front hand guard is operated. Replacing a tired, weakened, or broken spring helps restore safe stopping performance and consistent brake feel. As an authentic Husqvarna part (OEM 503 46 59-01), it fits the specified models precisely and supports long service life. It is suitable for routine maintenance or repair by professional users and DIY owners who want dependable braking without replacing the complete brake assembly.
Key Features:
- Genuine Husqvarna part for assured compatibility and performance (Genuine Part)
- OEM reference 503 46 59-01 for a precise fit in listed models
- Spring steel construction for reliable tension and fatigue resistance
- Helps restore correct chain brake return force and consistent operation
- Accurate fitment for straightforward installation with basic hand tools
- Supports safe chainsaw use by maintaining the intended braking function
- Broad model coverage across popular Husqvarna mid-range saws
Typical Applications:
Used to replace a worn, stretched, or damaged chain brake return spring during routine servicing, after heavy use, or following damage to the clutch cover assembly. Helps correct slow or inconsistent brake engagement/disengagement and improves the return action of the brake mechanism. Suitable for forestry, landscaping, arborist, farm, and estate work where reliable braking is essential for safe operation.
Also known as:
Chain brake return spring, Husqvarna chainsaw brake spring, band brake spring, inertia brake spring, chainsaw brake mechanism spring.
Fits Models:
266, 340, 340E, 345, 345E, 345E TrioBrake, 345ETrioBrake, 346XP, 346XP TrioBrake, 346XPTrioBrake, 350, 351, 353, 353 TrioBrake, 353TrioBrake, 357XP, 359, 445, 445E, 445E TrioBrake, 445EII, 445ETrioBrake, 445II, 450, 450E, 450EII, 455 Rancher, 455 Rancher II, 455 RancherII, 455E, 455E Rancher II, 455E Rancher II TrioBrake, 455E TrioBrake, 455ERancherII, 455ETrioBrake, 460, 461, 465 Rancher II, 465RancherII, 66
Alternate Part Numbers:
503 46 59-01, 503465901
Product Specifications
| L&S Part No. | 503 46 59 01 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Husqvarna |
| OEM No. | 503465901 |
| Unit of Sale | 1 |
| Applications | 266, 340, 340E, 345, 345E, 345E TrioBrake, 345ETrioBrake, 346XP, 346XP TrioBrake, 346XPTrioBrake, 350, 351, 353, 353 TrioBrake, 353TrioBrake, 357XP, 359, 445, 445E, 445E TrioBrake, 445EII, 445ETrioBrake, 445II, 450, 450E, 450EII, 455 Rancher, 455 Rancher II, 455 RancherII, 455E, 455E Rancher II, 455E Rancher II TrioBrake, 455E TrioBrake, 455ERancherII, 455ETrioBrake, 460, 461, 465 Rancher II, 465RancherII, 66 |
| Machine Type | Chainsaws |
| Fits Brands | Husqvarna |
| Fits Models | 340 | 266 | 340E | 345 | 345E | 345E TRIOBRAKE | 346XP | 346XP TRIOBRAKE | 350 | 351 | 353 | 353 TRIOBRAKE | 357XP | 359 | 445 | 445E | 445EII | 445E TRIOBRAKE | 445II | 450 | 450EII | 455E | 455E RANCHER II | 455E RANCHER II TRIOBRAKE | 455E TRIOBRAKE | 455 RANCHER | 455 RANCHER II | 460 | 461 | 465 RANCHER II | 66 |
