Description
Overview:
This Genuine Stihl gear housing (4230 640 0504) is the cast aluminium alloy casing that protects and supports the hedge trimmer's head gears, keeping the drive transfer smooth and reliable. Built for long service life in demanding work, the silver/grey housing keeps the bevel gears correctly aligned, helping the blades run cleanly and reducing wear on the drivetrain. It is a direct-fit replacement for Stihl long‐reach hedge trimmers including HL‐KM 0 and HL45, with compatibility across several related models (see list below). Precision‐made to Stihl specifications, it restores factory fit and finish when the original housing is cracked, corroded or damaged, and is suitable for both professional and domestic maintenance of hedges and shrubs.
Key Features:
- Genuine Stihl replacement part for assured compatibility and performance
- Robust cast aluminium alloy body for strength with low weight
- Precision fit maintains correct gear mesh and blade alignment
- Corrosion‐resistant silver/grey finish for outdoor use
- Direct swap for the original housing; no modifications required
- Helps reduce vibration and noise by keeping components in correct position
- Designed to handle regular use in tough garden and site conditions
- Supports smooth, efficient power transfer from the drive shaft to the blades
- Suitable for routine maintenance or restoration after impact damage
- Backed by Stihl's manufacturing standards for consistency and longevity
Typical Applications:
Replacement of a worn, cracked or damaged hedge trimmer head housing to restore smooth cutting performance. Ideal after impact, heavy abrasion, or when excessive play at the cutter head causes noise, vibration or poor cut quality. Suited to both trade users and homeowners maintaining hedges, shrubs, and boundary growth.
Also known as:
Gear head housing, bevel gear housing, gearbox cover, hedge trimmer head case, transmission case, reduction gear case, drive head, cutter head gearbox, front gear unit.
Fits Models:
HL-KM 0, HL-KM 0 deg, HL-KM0, HL100, HL100K, HL45, HL75, HL75K, HL90, HL90K, HL95K, HLKM0
Alternate Part Numbers:
4230-640-0504, 42306400504
Product Specifications
| L&S Part No. | 4230 640 0504 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42306400504 |
| Unit of Sale | 1 |
| Machine Type | Hedgetrimmers |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl replacement for assured compatibility and performance - Robust cast aluminium alloy for strength and low weight - Direct swap for original housing; no modifications required - Precision fit maintains correct gear mesh and blade alignment - Fits HL-KM 0, HL45, HL100, HL90, HL95K models |
| Fits Models | HL-KM 0 deg | HL45 | HL75, HL75K | HL90K, HL90, HL95K | HL100, HL100K | HL 0° |
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