Description
Overview:
This Chain Sprocket Cover is a genuine Stihl replacement part for mid-range petrol chainsaws, providing a precise fit on the MS311 and MS391. Built from durable, impact‐resistant materials, it shields the sprocket and clutch area from chips, dirt and knocks, helping the chain run smoothly and reducing wear on moving parts. As a direct replacement to OEM Part No. 1140 640 1700 (also known as 11406401700), it restores correct bar clamping and protection after damage or heavy use. Suitable for professional users and DIY owners, the cover maintains safety and efficiency by enclosing the drive side of the saw while allowing easy access for routine bar and chain servicing. Genuine Stihl quality ensures consistent fit and performance.
Key Features:
- Genuine Stihl part for assured compatibility and build quality
- Exact-fit replacement for the specified models with no modifications required
- Protects the chain sprocket and clutch zone from debris and impact
- Durable construction for long service life in demanding conditions
- Supports smooth chain running and reliable cutting performance
- Helps secure the guide bar firmly to the saw's bar studs
- Simple, straightforward installation with standard workshop tools
- Suitable for both professional forestry/landscaping and domestic use
- OEM reference: 1140 640 1700 (11406401700) for easy identification
- Reliable choice to replace cracked, worn, or missing covers
Typical Applications:
Used to replace damaged or worn side covers on working chainsaws to restore correct bar clamping and to protect the sprocket and clutch from sawdust and impact. Ideal for routine maintenance in forestry, arborist work, landscaping, estate and farm tasks, firewood processing, and site clearance where consistent, safe operation is required.
Also known as:
Sprocket guard, chain cover, sprocket shield, clutch cover, side cover, chain side cover, sprocket housing, drive‐side cover.
Fits Models:
MS271
MS271C
MS291
MS291C
MS311
MS391
Alternate Part Numbers:
1140-640-1700, 11406401700
Product Specifications
| L&S Part No. | 1140 640 1700 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11406401700 |
| Unit of Sale | 1 |
| Applications | MS271, MS271C, MS291, MS291C, MS311, MS391 |
| Machine Type | Chainsaws |
| Fits Brands | Stihl |
| Fits Models | MS271, MS271C, MS291, MS291C | MS311 | MS391 |
