The Wacker Neuson 5100015812 Flywheel is a genuine OEM component designed for the BS50-4As, BS60-4As, and BS70-4As vibratory rammers. Sourced directly from Wacker Neuson, this flywheel meets the original engineering specifications for the BS series rammer line, covering both standard and US-market configurations across multiple shoe sizes. Fitment spans a wide range of BS-4As variants, including 280 mm and 11-inch shoe models, making this the correct replacement for a broad cross-section of machines in this family.
Key Features
- Genuine OEM Rotating Mass Integrity — manufactured to the original balance and mass specification that the BS-4As engine and crankshaft assembly were engineered around, ensuring the reciprocating impact cycle performs as designed.
- Direct-Fit for BS-4As Rammer Family — engineered to bolt directly onto the BS50-4As, BS60-4As, and BS70-4As crankshaft without modification, including 280 mm and 11-inch shoe variants and US-market models.
- Wide Fitment Coverage — a single part number covers standard, GRX plastic shoe, and US-spec configurations across the BS50-4As, BS60-4As, and BS70-4As lines, simplifying parts ordering for mixed fleets.
- Consistent Impact Energy Output — a correctly functioning flywheel stores and releases rotational energy evenly with each stroke; a worn or damaged flywheel causes erratic blow energy, poor compaction performance, and increased engine strain.
- OEM Part Number Verified — part number 5100015812 is the Wacker Neuson factory-issued reference, eliminating guesswork when cross-referencing against your service manual or parts diagram.
The flywheel on a vibratory rammer is a rotating mass mounted to the engine crankshaft that stores kinetic energy between power strokes and releases it in a controlled burst to drive the rammer's impact mechanism. On BS-series jumping jacks, this stored energy is what generates the consistent, high-force blows needed to compact cohesive soils and trench fills effectively. When the flywheel is cracked, out of balance, or worn, the rammer loses stroke consistency, compaction force drops off, and the engine may run rough or vibrate excessively — all signs that replacement is needed to restore full performance.
Part Details
| Part Number | 5100015812 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flywheel |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BS 50-4As 280 mm shoe | BS50-4As | 5100015099, 5100027197 |
| BS 60-4As 280 mm shoe | BS60-4As | 5100015123, 5100027198 |
| BS 70-4As 280 mm shoe | BS70-4As | 5100015124, 5100015126, 5100027199 |
| BS50-4As 11in | BS50-4As 11in | 5100030599 |
| BS60-4As 11in | BS60-4As 11in | 5100030606, 5100037562 |
| BS50-4AS 11IN US | BS50-4As 11in US | 5100030598 |
| BS60-4AS 11IN US | BS60-4As 11in US | 5100030605 |
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.
