The Wacker Neuson Starter is a genuine OEM Starter designed for the RD40-130 and RD45-140 tandem roller series, including standard, cab, open-cab, and DPF-equipped variants. As a direct factory replacement, this starter is built to the original electrical and mechanical specification, ensuring it engages the engine cleanly and reliably from the first installation. This part covers an extensive range of RD-series configurations, so verify your model number before ordering to confirm compatibility with your specific machine.
Key Features
- Genuine OEM Electrical Specification — Matched to the original voltage, torque output, and solenoid engagement spec for the RD-series powertrain, so your roller starts as the factory intended.
- Broad RD-Series Coverage — Compatible with RD40-130 and RD45-140 tandem rollers across standard, cab (C), open (O), third-generation (.3), and DPF variants — a wide install base from a single part number.
- Direct Bolt-In Replacement — Designed to mount to the existing starter position with OEM-matched connection points, so installation follows the same procedure as the original unit.
- Protects Engine Starting Integrity — A fully functional starter delivers the correct cranking speed for reliable engine ignition; a worn or failed unit can result in hard starting, no-start conditions, or damage to the ring gear.
- Electrical Safety Compliance — As a genuine OEM component, this starter meets the original wiring and ignition circuit specifications, reducing the risk of electrical faults associated with out-of-spec replacements.
The starter is an electric motor that cranks the engine when the ignition is engaged, drawing current from the battery to spin the flywheel ring gear and initiate combustion. On a tandem roller like the RD40-130 or RD45-140, a reliable starter is essential for consistent daily operation — particularly in demanding site conditions where repeated start cycles are common. When a starter begins to fail, symptoms typically include slow or labored cranking, intermittent no-start faults, or a clicking solenoid with no engine turnover, all of which bring compaction work to a halt until the unit is replaced.
Part Details
| Part Number | 5100012684 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Starter |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD40-130 Tandem Roller | RD40-130 | 5100011391, 5100047382 |
| RD45-140 Tandem Roller | RD45-140 | 5100011392, 5100047383 |
| RD40-130 C Tandem Roller | RD40-130 C | 5100011393 |
| RD45-140 C Tandem Roller | RD45-140 C | 5100011394 |
| RD40-130 O | RD40-130 O | 5100011395 |
| RD45-140 O Tandem Roller | RD45-140 O | 5100011396 |
| RD40-130c | RD40-130c | 5100047384 |
| RD45-140c | RD45-140c | 5100047385 |
| RD40-130o | RD40-130o | 5100047386 |
| RD45-140o | RD45-140o | 5100047387 |
| RD40-130.3 | RD40-130.3 | 5100047395 |
| RD45-140.3 | RD45-140.3 | 5100047396 |
| RD40-130c.3 | RD40-130c.3 | 5100047397 |
| RD45-140c.3 | RD45-140c.3 | 5100047398 |
| RD40-130o.3 | RD40-130o.3 | 5100047399 |
| RD45-140o.3 | RD45-140o.3 | 5100047400 |
| RD40-130 DPF | RD40-130 DPF | 5100055777 |
| RD45-140 DPF | RD45-140 DPF | 5100055778 |
| RD40-130c DPF | RD40-130c DPF | 5100055779 |
| RD45-140c DPF | RD45-140c DPF | 5100055780 |
| RD40-130o DPF | RD40-130o DPF | 5100055781 |
| RD45-140o DPF | RD45-140o DPF | 5100055782 |
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.
