The Wacker Neuson Piston with Ring Set is a genuine OEM component designed for the G40, G50, G60, and G70 series portable generators. As a direct-from-manufacturer replacement, this assembly ensures the piston and ring dimensions match the original engine specifications, restoring compression and protecting cylinder wall integrity. It is confirmed to fit multiple G-series generator configurations including standard, mobile, and international variants across the G40, G50, G60, and G70 model families. When your generator is showing signs of lost compression, increased oil consumption, or declining power output, the Wacker Neuson is the correct factory-specified solution to bring it back to full operating condition.
Key Features
- Genuine OEM Compression Integrity — Manufactured to exact bore diameter and ring groove tolerances, ensuring the piston seats and seals correctly within the cylinder for consistent compression every time the engine fires.
- Complete Ring Set Included — Ships as a matched piston and ring set assembly, so you have everything needed for a full piston replacement in a single order — no separate ring sourcing required.
- Broad G-Series Fitment — Verified for G40, G50, G60, and G70 portable generator models, including standard, mobile, and LATAM/Brazil premium variants, covering a wide range of Wacker Neuson generator configurations.
- Restores Engine Power Output — Worn or stuck rings allow combustion gases to bypass the piston, cutting power and increasing fuel consumption. A fresh OEM piston and ring set brings cylinder sealing back to spec and recovers rated generator output.
- Fuel System Safety Compliance — Correct piston-to-cylinder clearance prevents blow-by gases from contaminating the crankcase and creating unsafe fuel vapor buildup — making this a safety-relevant repair on any internal combustion generator.
The piston is the reciprocating component inside the engine cylinder that converts combustion pressure into the mechanical rotation that drives your generator's alternator. The piston rings seal the gap between the piston and cylinder wall, preventing combustion gases from escaping into the crankcase and keeping engine oil out of the combustion chamber. When rings wear, lose tension, or the piston skirt becomes scored, compression drops, oil burns off faster, and power output falls noticeably. Replacing the piston and ring set as a matched assembly is the correct way to restore engine compression and get the generator running at its rated output again.
Part Details
| Part Number | 5200021212 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston with Ring Set |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Mobile Generator | G60 | 5200015951, 5200016641, 5100029185 |
| G70 | G70 | 5200015952, 5100022041, 5100022040 |
| Generator | G40 | 5200015906, 5200015907, 5200016640, 5100029184 |
| Generator | G50 | 5200015909 |
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.
