Description
Overview:
This piston packing is a genuine Stihl spare part for the SG 51 and SG 71 manual sprayers. It sits on the pump piston to create a reliable seal against the cylinder wall, helping to maintain operating pressure and prevent fluid bypass. Built from durable sealing material suitable for frequent pump strokes and typical garden chemicals, it resists wear and deformation over time. Use it to restore smooth pumping action and consistent spray output if your sprayer loses pressure, becomes harder to pump, or shows signs of leakage past the piston. Supplied to Stihl's original specification under part number 4255 679 0400, it fits correctly without modification and supports dependable performance in gardening, landscaping, and light agricultural work.
Key Features:
- Genuine Stihl part for assured fit and function on SG 51 and SG 71 sprayers
- Maintains pressure by sealing the piston, reducing leaks and loss of prime
- Robust, wear-resistant construction for long service intervals
- Restores consistent spray pattern and output with less pumping effort
- Matches original dimensions and profile for reliable operation
- Straightforward to fit during routine maintenance with basic tools
- Helps protect pump components by limiting contaminant ingress
- Suitable for use with common water-based garden and agricultural sprays when used as directed
Typical Applications:
Used during servicing or repair of Stihl SG 51 and SG 71 sprayers when pressure drops, output becomes uneven, or fluid bypass is evident. Common in grounds maintenance, garden care, landscaping, allotments, smallholdings, and pest control, where reliable manual spraying of water-based solutions is required.
Also known as:
Piston seal, pump packing, packing seal, sprayer gasket, pump cup, piston cup, sealing ring for sprayer piston.
Fits Models:
SG 51
SG 71
Alternate Part Numbers:
4255-679-0400, 42556790400
Product Specifications
| L&S Part No. | 4255 679 0400 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42556790400 |
| Unit of Sale | 1 |
| Applications | SG 51, SG 71, SG51, SG71 |
| Machine Type | Garden Sprinkler Systems |
| Fits Brands | Stihl |
| Fits Models | SG 51, SG 71 |
