The Wacker Neuson is a genuine OEM Oversize 0.50 Piston designed for VP and AP series single-direction vibratory plate compactors. As a factory-sourced component, it is manufactured to the same tolerances and material specifications as the original part, making it the correct choice for engine rebuilds where cylinder wear has been addressed through boring. This oversize piston is confirmed to fit the VP1340R, VP1340RW, VP1550R, VP1550RW, VP2050R, VP2050RW, and AP1550R — covering both standard and walk-behind configurations across Wacker Neuson's Value Vibratory Plate lineup.
Key Features
- Oversize Bore Compatibility — Machined to a 0.50mm oversize specification, this piston is engineered for use after cylinder boring, restoring correct compression and ring seal in a rebuilt engine.
- Genuine OEM Sourcing — Supplied directly from Wacker Neuson, this piston matches the exact alloy grade, crown geometry, and ring groove dimensions of the original component — critical for compression integrity in small displacement plate compactor engines.
- Drop-In Engine Rebuild Fit — Designed to install with the correct wrist pin, rings, and connecting rod hardware already specified for the VP and AP platform, supporting a clean, accurate rebuild process.
- Broad VP and AP Series Coverage — Fits the VP1340R, VP1340RW, VP1550R, VP1550RW, VP2050R, VP2050RW, and AP1550R, spanning 13 kN and 20 kN output ratings across 400mm and 500mm plate widths.
- Restores Full Compaction Output — A worn or undersized piston causes low compression, hard starting, and reduced centrifugal force output. Installing the correct oversize piston returns the engine to full power, keeping plate compaction force at rated performance.
The piston is the reciprocating component at the heart of a four-stroke engine, converting combustion pressure into the crankshaft rotation that drives the vibratory exciter unit on a plate compactor. When a cylinder is bored oversize to correct wear or scoring, a standard-dimension piston will no longer seal correctly against the cylinder wall, resulting in compression loss, excessive oil consumption, and weak engine output. Installing an oversize piston — matched precisely to the bored cylinder diameter — restores the tight ring-to-wall seal needed for full combustion efficiency. On a vibratory plate compactor, this directly translates to consistent centrifugal force output and dependable compaction performance across soil, aggregate, and paving stone applications.
Part Details
| Part Number | 5000158404 |
|---|---|
| Old Part Number | 0158404 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Oversize 0.50 Piston |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Value Vibratory Plate, 13 kN, 400mm/15.5in | VP1340RW | 5000009034 |
| Value Vibratory Plate, 15 kN, 500mm/19.5in | VP1550RW | 5000009030 |
| Single Direction Plates | AP1550R | 5000009538 |
| Value Vibratory Plate, 15 kN, 500mm/19.5in | VP1550R | 5000009029 |
| Value Vibratory Plate, 13 kN, 400mm/15.5in | VP1340R | 5000009033 |
| Value Vibratory Plate, 20 kN, 500mm/19.5in | VP2050R | 5000009088 |
| Single Direction Asphalt Plate | VP2050RW | 5000009511 |
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.
