The Wacker Neuson 5100035981 is a genuine OEM Back Pressure Valve designed for the BS50-2plus, BS60-2plus, and BS70-2plus series gasoline vibratory rammers. As a direct OEM replacement, this valve is manufactured to the same specifications as the original part, ensuring correct installation and proper engine function across all covered rammer variants. Fitment spans multiple regional and configuration variants including standard, heavy-duty (HA), US, and CN models within the BS50-2plus, BS60-2plus, and BS70-2plus families.
Key Features
- OEM-Grade Valve Sealing: — Manufactured to original pressure tolerances, maintaining the precise backflow characteristics the two-stroke engine depends on for consistent combustion cycles.
- Drop-In Engine Replacement: — Engineered to match the original valve geometry and port alignment, allowing straightforward installation without reworking the engine housing or intake path.
- Broad BS-Series Fitment: — Compatible across BS50-2plus, BS60-2plus, and BS70-2plus rammer variants, including standard, HA, US, and CN configurations.
- Protects Two-Stroke Engine Performance: — A properly functioning back pressure valve maintains correct crankcase pressure; a worn or failed valve leads to loss of power, hard starting, and irregular ramming action.
- Genuine Wacker Neuson Part: — Sourced directly from Wacker Neuson, part number 5100035981 carries the full OEM quality assurance expected for engine-internal components on professional compaction equipment.
The back pressure valve is a critical engine component in two-stroke rammers, controlling the flow of the air-fuel mixture within the crankcase to ensure each combustion cycle is properly charged. It acts as a one-way check point that prevents reverse flow, which is essential for maintaining the correct pressure differential that drives piston movement and, ultimately, the percussive ramming action. When this valve deteriorates or fails, the engine loses its ability to build adequate crankcase pressure, resulting in rough running, power loss, difficulty starting, and reduced compaction force at the foot.
Part Details
| Part Number | 5100035981 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Back Pressure Valve |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BS60-2plus 11in US | BS60-2plus 11in US | 5100030602 |
| BS60-2plus 11in CN | BS60-2plus 11in CN | 5100039660 |
| BS50-2PLUS 11IN HA US | BS50-2plus 11in ha US | 5100030595 |
| BS50-2plus 11in | BS50-2plus 11in | 5100030596 |
| BS60-2plus 11in | BS60-2plus 11in | 5100030604 |
| BS50-2plus 11in US | BS50-2plus 11in US | 5100030594 |
| BS50-2plus 6in (24mm) | BS50-2plus 6in (24mm) | 5100030597 |
| BS60-2PLUS 11IN HA US | BS60-2plus 11in ha US | 5100030603 |
| BS70-2plus 11in | BS70-2plus 11in | 5100030609 |
| BS70-2plus 11in US | BS70-2plus 11in US | 5100030608 |
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.
