Product Parameters
| Specification Item | Description |
|---|---|
| Compatible Models | Stihl 044, MS440, 046, MS460, 441, MS461, MS361, MS362 |
| Worm Gear OEM No. | 1128 640 7112 / 1128 640 3205 / 1128 640 7114 |
| E-clip OEM No. | 9460 522 0520 (commonly included) |
| Kit Contents | Worm gear, E-clip (spring included in some kits) |
| Sprocket Type | 3/8" rim sprocket system |
| Material | Metal alloy / Steel |
| Application | Drives automatic oil pump for chain lubrication |
Product Description
Product Details
1. Direct OEM Replacement
Manufactured to replace original Stihl part numbers 1128 640 7112 and 1128 640 3205, ensuring a precise fit for MS440 and 044 chainsaws.
2. Drives Automatic Oiling System
The worm gear is the critical component that drives the oil pump, ensuring consistent chain lubrication for reduced wear and extended bar life.
3. Essential Kit for Oil Pump Repair
A worn worm gear will cause the oil pump to fail. This set restores proper lubrication, preventing premature chain and bar damage.
Products Package
About Us
Production
Quality control
fAQ
Q1: What are the symptoms of a worn worm gear?
A: The chain stops receiving oil, the oil pump fails to prime, or the chain runs dry, leading to overheating and rapid wear..
Q2: What tools are needed to replace the worm gear?
A: The worm gear is located behind the clutch drum. Installation requires a clutch removal tool and basic hand tools .
Q3: Does the E-clip come with the worm gear?
A: Many kits include both the worm gear and the E-clip as a set. Always verify the contents before ordering.
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