The Wacker Neuson Unbalance Shaft is a genuine OEM component designed for the RD40-130 series tandem rollers, including the RD40-130, RD40-130 C, RD40-130 O, RD40-130.3, RD40-130c.3, and RD40-130o.3 models. Sourced directly from Wacker Neuson, this part meets the exact engineering specifications of the original, ensuring proper vibration output and compaction performance. It is a direct replacement for the original unbalance shaft in all listed RD40-130 variants, covering both US and standard configurations. Verify your model number before ordering to confirm fitment.
Key Features
- Genuine OEM Vibration Integrity — Manufactured to Wacker Neuson's original mass and geometry specifications, delivering the correct eccentric force for consistent soil compaction.
- Direct Drop-In Replacement — Matches the original shaft dimensions and mounting interface, fitting into the existing drum assembly without modification to housings or bearings.
- Broad RD40-130 Series Coverage — Compatible with the full RD40-130 family, including RD40-130, RD40-130 C, RD40-130 O, and the .3-generation variants in both US and standard configurations.
- Sustained Compaction Output — A worn or out-of-balance shaft reduces amplitude and compaction force; this replacement restores full drum vibration so the roller delivers rated performance on every pass.
- OEM Part Number Verified — Listed under Wacker Neuson part number 5100011929, giving you confidence you are ordering the correct component for your machine.
The unbalance shaft is the core rotating component inside the roller drum that generates vibratory compaction force. As it spins, its off-center mass creates the high-frequency oscillation that drives the drum into the material being compacted, increasing density with each pass. When the unbalance shaft wears, cracks, or fails, the drum loses amplitude, compaction quality drops, and the machine may produce unusual vibration patterns or excessive noise — making timely replacement essential to maintaining productivity and protecting surrounding drivetrain components.
Part Details
| Part Number | 5100011929 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Unbalance Shaft |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD40-130 Tandem Roller | RD40-130 | 5100011391 |
| RD40-130 Tandem Roller | RD40-130 US | 5100021801 |
| RD40-130 C Tandem Roller | RD40-130C US | 5100021803 |
| RD40-130 O Tandem Roller | RD40-130O US | 5100021805 |
| RD40-130.3 | RD40-130.3 | 5100047395 |
| RD40-130c.3 | RD40-130c.3 | 5100047397 |
| RD40-130o.3 | RD40-130o.3 | 5100047399 |
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.
