Description
Overview:
This Gear Housing is a Genuine Stihl part for professional and domestic hedge trimmers, including HS 81 R and HS 81 RC. Made from durable cast aluminium, it forms the protective outer case for the cutter drive, supporting the internal gear train and helping keep lubrication where it should be. A sound housing is vital for smooth, efficient operation and to prevent further damage if the original casing is cracked or worn. Sized for convenience at 255 mm long and 97 mm wide, it is built to Stihl's specifications for a reliable fit and service life. Use it to restore performance after impact damage or long-term wear so your trimmer can cut cleanly and run consistently through demanding hedge maintenance work.
Key Features:
- Genuine Stihl part for assured compatibility and reliability (4237 640 0501)
- Robust cast aluminium construction resists impact and corrosion in outdoor use
- Precise OEM fit maintains gear alignment and supports smooth drive operation
- Helps protect internal gears and bearings from debris and abrasion
- Straightforward replacement using existing fixings and alignment points
- Restores performance by replacing cracked, worn, or stripped housings
- Stable casing helps reduce vibration and premature wear on moving parts
- Practical reference dimensions: 255 mm length, 97 mm width
Typical Applications:
Replacement of a damaged or fatigued gear case on Stihl hedge trimmers used in landscaping, grounds maintenance, local authority work, and garden care. Suitable when the original housing has cracked after impact, threads have failed, or the casing is distorted, to recover smooth gear operation and consistent cutting performance in regular or intensive trimming tasks.
Also known as:
Gear head, drive head, cutter head case, transmission case, head gearcase, reduction gear case, cutter drive housing, front gear head, trimmer head case, drive unit housing.
Fits Models:
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
Alternate Part Numbers:
4237-640-0501, 42376400501
Product Specifications
| L&S Part No. | 4237 640 0501 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42376400501 |
| Unit of Sale | 1 |
| Size | Overall Length: 255mm Overall Width: 97mm |
| 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 |
