The Wacker Neuson Piston Ring Set 0.25 is a genuine OEM oversize piston ring set designed for the PT3A 75mm/3-inch centrifugal trash pump series and the GV3800 portable generator. As a direct Wacker Neuson OEM part, is manufactured to the same specifications as the original rings, ensuring correct fitment in worn or re-bored cylinders where standard-size rings are no longer suitable. This 0.25mm oversize set is intended for engine rebuilds and is the proper choice when the cylinder bore has been machined to the first oversize dimension. Confirm your machine's model number and bore size before ordering to ensure this is the correct ring set for your application.
Key Features
- Oversize OEM Ring Specification — Manufactured to exact 0.25mm oversize dimensions, ensuring correct ring-to-wall clearance in a re-bored cylinder — not a universal or approximate fit.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, so ring material grade, tension, and coating match what came out of the engine originally.
- Confirmed Fitment — Compatible with PT3A 75mm/3-inch centrifugal trash pumps and the GV3800 portable generator engine; verify bore oversize before installation.
- Restores Compression and Oil Control — Worn or broken piston rings cause blow-by, oil burning, and loss of engine power; a correct oversize set restores cylinder sealing and puts the engine back to full working output.
- Rebuild-Ready Set — Supplied as a complete ring set for the piston, simplifying the engine overhaul process and ensuring all ring grooves are serviced at the same time.
Piston rings form a dynamic seal between the piston and the cylinder wall, serving two critical functions: they contain combustion pressure above the piston to drive the power stroke, and they control the thin film of oil on the cylinder wall to prevent it from entering the combustion chamber. Over time, rings wear, lose tension, or break, allowing combustion gases to escape past the piston — a condition known as blow-by — which causes power loss, excessive oil consumption, and hard starting. An oversize ring set like the 5200001248 is used during an engine rebuild when the cylinder bore has been honed or bored out to remove wear, restoring the correct running clearance between the ring and the freshly machined wall.
Part Details
| Part Number | 5200001248 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston Ring Set 0.25 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 75mm/3in Centrifugal Trash Pum p | PT3A | 5000009098, 5000009101, 5000009240, 5000620800 |
| Value Portable Generator | GV3800 | 5000620994 |
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.
