The Wacker Neuson 5100012701 Alternator is a genuine OEM alternator designed for the RD18-80 and RD18-100 series tandem rollers, including the RD18-80, RD18-100, RD18-100 C, and their.3-generation variants. As a direct factory replacement, this alternator is manufactured to the same specifications as the original unit installed at the plant, ensuring correct electrical output and a drop-in fit with no modifications to wiring or mounting hardware. This part covers an extensive range of RD18 configurations — including US-market, SE, and combination-drum models — making it the right choice when you need a confirmed, model-specific repair part for your machine.
Key Features
- Correct Electrical Output Rating — Genuine OEM construction ensures the alternator delivers the voltage and amperage the RD18 series electrical system requires, protecting sensitive machine controls and battery charging circuits.
- Direct Mounting Compatibility — Bolt pattern, bracket interface, and wiring connector match the original installation on RD18-80 and RD18-100 series machines for a straightforward swap.
- Broad RD18 Series Coverage — Fits RD18-80, RD18-100, RD18-100 C, RD18-80.3, RD18-100.3, RD18-100c.3, and corresponding US, SE, and combination-drum variants across multiple serial number ranges.
- Charging System Integrity Restored — A failed alternator leaves the RD18 running on battery alone, risking a mid-shift shutdown. This replacement restores continuous charging so the machine stays operational through full compaction runs.
- Genuine Wacker Neuson OEM Part — Sourced directly through the Wacker Neuson parts network, part number 5100012701 carries the full OEM backing expected of a critical electrical component.
The alternator is the machine's primary source of electrical power while the engine is running. It converts mechanical energy from the engine into the DC current needed to keep the battery charged and supply power to the roller's controls, lighting, and vibration system electronics. When an alternator begins to fail, the battery drains progressively under load, leading to warning lights, erratic control response, or a complete loss of power mid-operation. On a tandem asphalt roller like the RD18 series, where consistent drum vibration and operational control are essential to achieving proper compaction density, a functioning alternator is not an optional component — it is fundamental to the machine performing its job correctly.
Part Details
| Part Number | 5100012701 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Alternator |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD18-80 | RD18-80 | 5100047360, 5100055774, 5100011382 |
| RD18-100 Tandem Roller | RD18-100 US | 5100027573 |
| RD18-100 | RD18-100 | 5100047361, 5100011383, 5100055775 |
| Vibration Roller | RD18-80 SE | 5100044988 |
| Vibration Roller | RD18-100c 3 | 5100047363 |
| RD18 | RD18-100.3 | 5100055947 |
| RD18-100 C Tandem Roller | RD18-100 C US | 5100027574 |
| RD 18-100 C | RD18-100c | 5100047362, 5100055776 |
| RD18-100 C Tandem Roller | RD18-100 C | 5100011384 |
| RD18-80 Tandem Roller | RD18-80 US | 5100027572 |
| RD18-80.3 | RD18-80.3 | 5100055946 |
| RD18-100c.3 | RD18-100c.3 | 5100055948 |
| Vibration Roller | RD18-100 SE | 5100044989 |
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.
