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Genuine Husqvarna Chain Brake Spring - 503 70 99-02
The Genuine Husqvarna 503709902 Chain Brake Spring is a safety-critical component responsible for the instant engagement of the chain brake band.
High-Tensile Safety Performance
Professional saws generate significant chain inertia. This OEM spring is engineered to deliver precise tension cycles without losing its "memory." Cheaper aftermarket springs can stretch or snap, potentially delaying the brake engagement during a kickback event.
Model Compatibility:
| Husqvarna |
61, 268, 272 XP
281, 288 XP
362, 365, 365 X-TORQ
371, 372 XP, 372 XP X-TORQ
385 XP, 390 XP
570 II, 575 XP, 576 XP, 576 XP AutoTune |
| Jonsered |
CS2163, CS2165, CS2166, CS2171, CS2172, CS2186, CS2188 |
📄 Technical Resources (PDF):
🛠️ Mechanic's Tip:
Warning: Brake springs are under massive tension. Always wear eye protection during installation. Use a specialized spring pulling tool or a sturdy pair of needle-nose pliers to avoid the spring "launching" during assembly.
503709901
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Fits models:
- Husqvarna 268, 272 XP, 281, 288 XP, 362, 365, 365 X-TORQ, 371, 372 XP, 372 XP X-TORQ, 385 XP, 390 XP, 570 II, 575 XP, 576 XP, 576 XP AutoTune, 61
Jonsered CS2163, CS2165, CS2166, CS2171, CS2172, CS2186, CS2188
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