The Wacker Neuson Piston is a genuine OEM Piston designed for a wide range of Wacker Neuson equipment including MG3 portable generators, MFS12 and MFS14 floor saws, ML225, ML240, and ML425 light towers, MFP fire pumps, and MG3sd and MG3d generator variants. As a factory-sourced component, the meets the original engineering specifications set by Wacker Neuson, ensuring a direct drop-in fit with no guesswork on compatibility. This piston spans an extensive fitment range, covering light towers, multifunction floodlight towers, floor saws, portable generators, and fire pumps — making it a versatile stock item for service shops and fleet operators. Confirm your model number against the fitment list before ordering to ensure the correct application.
Key Features
- Genuine OEM Dimensional Accuracy — Manufactured to Wacker Neuson's original bore and crown tolerances, ensuring correct compression and ring seal integrity from first startup.
- Direct Drop-In Replacement — Matches the original pin bore, skirt profile, and ring groove dimensions of the factory piston for a straightforward installation without machining or adaptation.
- Broad Fitment Coverage — Compatible with MG3, MG3sd, and MG3d portable generators, MFS12 and MFS14 floor saws, ML225, ML240, and ML425 light towers, and MFP1.5 and MFP2 fire pumps.
- Sustained Engine Compression — A properly fitted piston maintains the combustion seal that drives full power output; a worn or damaged piston causes loss of compression, hard starting, and excessive oil consumption.
- Fuel System Safety Compliance — Correct piston fit prevents blow-by combustion gases from contaminating the crankcase, protecting downstream engine components and maintaining safe operating pressure levels.
The piston is the reciprocating heart of the engine's combustion cycle — it travels up and down inside the cylinder bore, compressing the air-fuel mixture and transferring the force of combustion through the connecting rod to the crankshaft. A correctly dimensioned piston maintains the tight seal between the piston rings and cylinder wall that is essential for full compression and efficient power delivery. When a piston wears, cracks, or suffers damage, the result is reduced compression, increased oil burning, rough running, and — left unaddressed — potential engine seizure, making timely replacement critical to keeping the machine operational.
Part Details
| Part Number | 5000406511 |
|---|---|
| Old Part Number | 0406511 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Light Towers | ML240 | 5000630118, 5000630205, 5000630326 |
| Light Towers | ML425 | 5000630119, 5000630206 |
| Light Towers | ML225 | 5000630120, 5000630207 |
| Floor Saw | MFS14 | 5000630186, 5000630221 |
| Floor Saw | MFSX14 | 5000630246 |
| Portable Generators | MG3 | 5000630142, 5000630135, 5000630225, 5000630230, 5000630238, 5000630240 |
| Floor Saw | MFS12 | 5000630187, 5000630220 |
| Portable Generators | MG3sd | 5000630201, 5000630215, 5000630235 |
| MG3 Generator | MG3d | 5000630213 |
| Fire Pump | MFP1.5 | 5000630258 |
| Fire Pump | MFP2 | 5000630259 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
