Description
Overview:
The Gearbox Cover for Stihl hedge trimmers is a genuine Stihl part designed to protect and seal the gear head on machines such as the HS 81 R and HS 81 RC. Supplied under OEM part number 4237 640 5801, it is built from a durable metal alloy with a hard-wearing silver/grey finish to resist knocks, abrasion, and corrosion in regular trimming work. The cover shields the bevel gears and bearings from debris and moisture, helping to maintain correct lubrication and smooth drive to the blades. Its precision moulding ensures a reliable, leak-resistant fit to the gearbox housing, restoring performance when a damaged or worn cover is replaced. Being a Genuine Part, it matches the original specification for fit, alignment, and longevity.
Key Features:
- Genuine Stihl part (OEM 4237 640 5801) for assured fit and compatibility
- Robust die-cast metal alloy construction for durability and impact resistance
- Helps seal the gearbox to keep grease in and dirt, dust, and moisture out
- Precision-engineered geometry for correct blade drive and smooth cutting
- Corrosion-resistant finish suited to outdoor and wet conditions
- Direct replacement using existing fixings; straightforward swap for worn covers
- Supports routine maintenance and extends overall gearbox service life
- Built for regular professional and domestic use across hedge care tasks
- Stable, accurate seating reduces vibration and wear on internal components
- Compatible with multiple Stihl HS 81/82/86/87 series hedge trimmers
Typical Applications:
Replacing cracked, dented, or leaking gearbox covers on Stihl hedge trimmers used in gardening, landscaping, grounds maintenance, estate care, and local authority work. Ideal when grease seepage, contamination, or misalignment is affecting blade drive or increasing noise and vibration.
Also known as:
Gearbox lid, gear housing cover, gear case cover, gear head cover, transmission cover, gearhead cap.
Fits Models:
HS 81 R, HS 81 RC, HS 81 T, HS 81 TC, HS 82, HS 86 R, HS 86 T, HS 87
Alternate Part Numbers:
4237-640-5801, 42376405801
Product Specifications
| L&S Part No. | 4237 640 5801 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42376405801 |
| Unit of Sale | 1 |
| Applications | HS 81 R, HS 81 RC, HS 81 T, HS 81 TC, HS 82, HS 86 R, HS 86 T, HS 87, HS81, HS81R, HS81RC, HS81T, HS81TC, HS82, HS86, HS86R, HS86T, HS87 |
| Machine Type | Hedgetrimmers |
| Fits Brands | Stihl |
| Fits Models | HS81, HS86 | HS82 | HS87 |
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