The Wacker Neuson Starter is a genuine OEM Starter designed for the RD18-80, RD18-100, and RD18-100 C series tandem and vibration rollers. Sourced directly from Wacker Neuson, this part carries the same fit, form, and function as the component installed at the factory — giving you confidence that it will mount and connect exactly as the original did. Confirmed fitment spans multiple configuration variants across the RD18 roller family, including US and SE editions as well as the RD18-80.3, RD18-100.3, and RD18-100c.3 generations. If your roller is cranking slowly, failing to turn over, or not starting at all, replacing the is a direct and proven fix.
Key Features
- OEM Electrical Integrity — Built to the same output torque and engagement specifications as the original, ensuring the starter motor delivers sufficient cranking force to fire the engine under load.
- Direct Drop-In Installation — Matches the original mounting bolt pattern and solenoid connector configuration, so the 5100012689 bolts straight into place without reworking the mounting bracket or wiring harness.
- Broad RD18 Series Coverage — Confirmed fit across RD18-80, RD18-100, and RD18-100 C variants, including US, SE, and the .3-generation models, covering a wide range of production years and configurations.
- Consistent Engine Cranking Performance — A properly functioning starter engages the flywheel ring gear cleanly and spins the engine to ignition speed every time; a worn unit causes slow cranking, grinding, or complete no-start conditions that halt your compaction work.
- Electrical Safety Assurance — As a genuine OEM component, the 5100012689 meets the original circuit load and thermal ratings for the RD18 platform, reducing the risk of wiring damage or starter relay failure caused by out-of-spec draw.
The starter is the electric motor responsible for cranking the engine each time you turn the ignition key. It draws power from the battery, engages a drive gear against the engine flywheel, and spins the engine fast enough for combustion to begin. On compaction equipment like the RD18 roller series, reliable starting is critical to keeping paving and compaction schedules on track. When a starter begins to fail, symptoms typically include sluggish or intermittent cranking, a single loud click with no engine movement, or complete electrical silence — all of which point to a starter that needs immediate replacement to restore normal machine operation.
Part Details
| Part Number | 5100012689 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Starter |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD18-80 Tandem Roller | RD18-80 | 5100011382, 5100047360, 5100055774 |
| RD18-100 Tandem Roller | RD18-100 | 5100011383, 5100047361, 5100055775 |
| RD18-100 C Tandem Roller | RD18-100 C | 5100011384 |
| RD18-80 Tandem Roller | RD18-80 US | 5100027572 |
| RD18-100 Tandem Roller | RD18-100 US | 5100027573 |
| RD18-100 C Tandem Roller | RD18-100 C US | 5100027574 |
| Vibration Roller | RD18-80 SE | 5100044988 |
| Vibration Roller | RD18-100 SE | 5100044989 |
| RD 18-100 C | RD18-100c | 5100047362, 5100055776 |
| Vibration Roller | RD18-100c 3 | 5100047363 |
| RD18-80.3 | RD18-80.3 | 5100055946 |
| RD18 | RD18-100.3 | 5100055947 |
| RD18-100c.3 | RD18-100c.3 | 5100055948 |
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.
