The Wacker Neuson is a genuine OEM Piston.50 Complete designed for BS-series four-stroke vibratory rammers, including the BS50-4, BS50-4s, BS60-4, BS500-4, and BS600-4 models. As a factory-sourced component, is manufactured to the same tolerances and material specifications as the original piston, ensuring a correct drop-in fit within the engine bore without any guesswork. This oversized.50 piston is intended for engines that have been bored to accept a larger-diameter piston during a rebuild or overhaul. Confirming your machine's bore specification before installation ensures you receive the full service life this part is engineered to deliver.
Key Features
- Oversized Rebuild Specification: — The .50 oversize designation means this piston is matched to a bored-out cylinder, restoring correct compression and engine performance after a professional overhaul.
- Genuine OEM Sourcing: — Produced by Wacker Neuson to original engineering tolerances, covering ring groove dimensions, skirt profile, and pin bore alignment specific to the BS-series engine.
- Broad BS-Series Compatibility: — Fits multiple BS50-4, BS50-4s, BS60-4, BS500-4, and BS600-4 vibratory rammer configurations, covering a wide range of four-stroke rammer builds with 280mm/11in shoe setups.
- Compression Restoration: — A correctly fitted piston seals combustion gases efficiently, restoring the impact force and compaction output your rammer was designed to deliver — critical for cohesive soil and trench work.
- Engine Longevity After Rebore: — Using an OEM oversized piston after a cylinder bore service prevents premature blow-by, excessive oil consumption, and loss of striking force that a worn or incorrect-spec piston causes.
The piston is the core reciprocating component inside the engine cylinder. It compresses the air-fuel mixture during combustion and transfers the resulting force through the connecting rod to drive the rammer's compaction stroke. In a vibratory rammer like the BS50-4 or BS60-4, consistent piston-to-cylinder clearance is directly linked to impact energy output — if the piston is worn or undersized for a bored cylinder, compression drops, the engine loses power, and compaction performance suffers noticeably. An oversized replacement piston like the 5000158639 is used specifically when the cylinder has been machined to a larger diameter, bringing clearances back within specification and returning the engine to full working performance.
Part Details
| Part Number | 5000158639 |
|---|---|
| Old Part Number | 0158639 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston .50 Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 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 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.
