The Wacker Neuson is a genuine OEM Unbalance Shaft designed for the RD27-120 and RD28-120 series tandem rollers, including standard, C, O, DPF, and electric variants. As a factory-sourced component, it meets the exact tolerances and material specifications required for dependable vibration performance in demanding compaction applications. This shaft is a direct-fit replacement across the full RD27-120 and RD28-120 model families, covering configurations including the RD27-120c, RD27-120o, RD28-120c, RD28-120o, RD28-120 DPF, RD28e-120, and related variants. Keep your roller compacting at full capacity by replacing a worn or damaged Unbalance Shaft with the correct Wacker Neuson part.
Key Features
- Genuine OEM Vibration Spec: — Manufactured to Wacker Neuson's exact mass and geometry tolerances, ensuring the shaft generates the correct centrifugal force for effective soil and asphalt compaction.
- Drop-In Installation: — Engineered to the original shaft dimensions and interface, so it seats and secures in the drum assembly the same way as the factory-installed component.
- Broad RD27/RD28 Series Coverage: — Fits the full range of RD27-120 and RD28-120 tandem rollers, including standard, C, O, DPF, and electric (e) variants across multiple production series.
- Sustained Compaction Output: — A correctly balanced unbalance shaft maintains consistent drum amplitude and frequency; a worn or out-of-spec shaft causes uneven compaction, excessive vibration, and accelerated bearing wear throughout the drum assembly.
- Long-Term Durability: — Built from materials selected by Wacker Neuson to withstand the continuous rotational stress of vibratory compaction cycles, matching the service life expectations of the original component.
The unbalance shaft is the core component responsible for generating the vibration in a tandem roller's drum. It works by rotating an off-center mass at high speed inside the drum housing, producing the centrifugal force that drives the compaction action into the surface below. When the unbalance shaft wears, bends, or fails, the drum loses consistent vibratory output — resulting in poor compaction density, increased pass counts, and potential damage to surrounding bearings and housings.
Part Details
| Part Number | 5100012030 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Unbalance Shaft |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD27-120 Tandem Roller | RD27-120 | 5100011386 |
| RD28-120 Tandem Roller | RD28-120 US | 5100021756 |
| RD28-120 C Tandem Roller | RD28-120C US | 5100021758 |
| RD28-120 O Tandem Roller | RD28-120O US | 5100021800 |
| RD27-120 | RD 27-120.3 | 5100032198 |
| RD27-120c | RD27-120c.3 | 5100047371 |
| RD27-120o | RD27-120o.3 | 5100047373 |
| RD28-120 | RD28-120 | 5100047375 |
| RD28-120c | RD28-120c | 5100047377 |
| RD28-120o | RD28-120o | 5100047379 |
| RD28-120 DPF | RD28-120 DPF | 5100047390 |
| RD28-120c DPF | RD28-120c DPF | 5100047392 |
| RD28-120o DPF | RD28-120o DPF | 5100047394 |
| RD28e-120 | RD28-120e | 5100066732 |
| RD28e-120c | RD28-120ce | 5100066734 |
| RD28e-120o | RD28-120oe | 5100066736 |
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.
