The Wacker Neuson is a genuine OEM Piston.25 Complete designed for a range of Wacker Neuson vibratory plate compactors, vibratory rammers, and portable generators. As a direct OEM replacement, part is manufactured to the same specifications as the original component, ensuring a correct fit across compatible models including the VP1030R vibratory plate, BS50-4 and BS60-4 vibratory rammers, VP40H vibratory soil plate, BS500-4, BS600-4, BS50-4s, and the GPi1700 portable inverter generator. Sourcing the correct oversize piston is critical when rebuilding a worn engine — using ensures the right dimensions and material grade for a proper engine rebuild on supported machines.
Key Features
- Genuine OEM Oversize Piston: — Cast and finished to OEM tolerances, this .25 oversize piston maintains the correct bore clearance and ring groove dimensions required for a proper engine seal after cylinder boring.
- Drop-In Engine Rebuild Fit: — Engineered as a direct replacement that installs into the cylinder bore using the same wrist pin and ring configuration as the original piston assembly.
- Broad Model Compatibility: — Confirmed fitment across VP1030R vibratory plate compactors, BS50-4, BS50-4s, BS60-4, BS500-4, and BS600-4 vibratory rammers, VP40H soil plate, and the GPi1700 inverter generator.
- Restores Full Compression: — A correctly fitted oversize piston restores cylinder compression and combustion efficiency, bringing engine power output back to original operating levels after wear or scoring.
- Fuel System Integrity: — Proper piston-to-wall clearance prevents blow-by, which can contaminate engine oil and lead to accelerated wear of rings, bearings, and valve train components if left unaddressed.
A piston is the reciprocating component inside the engine cylinder that compresses the air-fuel mixture and transfers combustion force to the crankshaft via the connecting rod. Over time, cylinder walls and pistons wear, increasing clearance and allowing combustion gases to bypass the rings — a condition known as blow-by — which reduces power, increases oil consumption, and can lead to full engine failure. An oversize piston like the 5000158638 is used during an engine rebuild after the cylinder bore has been machined to a larger diameter, restoring the correct fit and sealing surfaces needed for efficient combustion. Installing the correct oversize grade is essential; an incorrect size will result in either excessive clearance or seizure.
Part Details
| Part Number | 5000158638 |
|---|---|
| Old Part Number | 0158638 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston .25 Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| VP1030R-VIBROPLATE | VP1030R | 5000008702, 5000009504 |
| 280mm/11in Shoe, Four-cycle Vi bratory Rammer | BS60-4 | 5000009340, 5000620000, 5000620051, 5000620109, 5000620110 |
| 280mm/11in Shoe, Four-cycle Vi bratory Rammer | BS50-4 | 5000009386, 5000620077, 5000620108 |
| Vibratory Soil Plate, 40 kN | VP40H | 5000009535 |
| Vibratory Rammer, 280mm/11in S hoe | BS500-4 | 5000009329 |
| Vibratory Rammer, 280mm/11in S hoe | BS600-4 | 5000009331 |
| Four-stroke Vibratory Rammer, 280mm/11in Shoe | BS50-4s | 5000620071 |
| Portable Inverter Generator | GPi1700 | 5000620778 |
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.
