The Wacker Neuson 5100012409 Magnet is a genuine OEM component designed for the RD-series tandem rollers, with confirmed fitment across the RD18, RD24, RD27, RD28, RD40, and RD45 model families. Sourced directly from Wacker Neuson, this magnet meets the original engineering specifications required for correct sensor function and machine operation. It is a direct replacement for the original part, covering a wide range of configurations including standard, combination, open-ROPS, canopy, DPF, and US-market variants across the RD series. Verify your machine's model and serial number against the fitment list to confirm compatibility before ordering.
Key Features
- Genuine OEM Signal Accuracy — Manufactured to Wacker Neuson's original specification, ensuring the magnet delivers the correct field strength required for precise sensor triggering in RD-series drum and speed monitoring systems.
- Drop-In Replacement — Matches the original mounting position and dimensions, allowing straightforward installation without modification to brackets or sensor housings.
- Broad RD-Series Coverage — Fits RD18, RD24, RD27, RD28, RD40, and RD45 tandem rollers across multiple build variants, including DPF-equipped models, combination drum configurations, and US-market machines.
- Consistent Drum Speed Feedback — A correctly functioning magnet ensures the drum rotation sensor receives clean, uninterrupted signals, supporting accurate compaction control and smooth machine operation on asphalt and soil applications.
- OEM Part Number Confidence — Part number 5100012409 is the authoritative Wacker Neuson reference for this component, cross-referencing directly to the extensive RD-series fitment list for fast, accurate identification.
The magnet in a tandem roller works alongside a proximity or Hall-effect sensor to monitor drum rotation speed. As the drum spins, the magnet passes the sensor at regular intervals, generating the pulse signal the machine's control system uses to calculate surface speed and compaction pass data. When the magnet is missing, damaged, or has lost magnetic strength, the sensor receives no signal or an inconsistent one — which can trigger fault codes, disable compaction monitoring functions, or cause erratic machine behavior. Replacing a worn or failed magnet restores accurate drum feedback and keeps the roller's control system operating as intended.
Part Details
| Part Number | 5100012409 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Magnet |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD18-80 | RD18-80 | 5100047360, 5100055774, 5100011382 |
| RD18-100 Tandem Roller | RD18-100 US | 5100027573 |
| RD45-140 Tandem Roller | RD45-140 US | 5100021802 |
| RD24-100o | RD24-100o | 5100047378 |
| RD40-130 DPF | RD40-130 DPF | 5100055777 |
| RD 24-100.3 | RD 24-100.3 | 5100032197 |
| RD45-140 Tandem Roller | RD45-140 | 5100011392, 5100047383 |
| RD40-130c.3 | RD40-130c.3 | 5100047397 |
| Vibration Roller | RD18-100c 3 | 5100047363 |
| RD24-100 O Tandem Roller | RD24-100O US | 5100021759 |
| RD18-80.3 | RD18-80.3 | 5100055946 |
| RD40-130 C Tandem Roller | RD40-130C US | 5100021803 |
| RD40-130 Tandem Roller | RD40-130 | 5100011391, 5100047382 |
| RD27-120 Tandem Roller | RD27-120 | 5100011386 |
| RD45-140o DPF | RD45-140o DPF | 5100055782 |
| RD24-100o.3 | RD24-100o.3 | 5100047372 |
| RD18-100 | RD18-100 | 5100055775, 5100011383, 5100047361 |
| RD18-100 C Tandem Roller | RD18-100 C US | 5100027574 |
| RD45-140o | RD45-140o | 5100047387 |
| RD45-140c DPF | RD45-140c DPF | 5100055780 |
| RD28-120 DPF | RD28-120 DPF | 5100047390 |
| Vibration Roller | RD18-80 SE | 5100044988 |
| RD40-130 Tandem Roller | RD40-130 US | 5100021801 |
| RD28-120c | RD28-120c | 5100047377 |
| RD45-140 C Tandem Roller | RD45-140C US | 5100021804 |
| RD40-130o.3 | RD40-130o.3 | 5100047399 |
| RD27-120 O Tandem Roller | RD27-120 O | 5100011390 |
| RD40-130 O | RD40-130 O | 5100011395 |
| RD28-120 | RD28-120 | 5100047375 |
| RD18-100c | RD18-100c | 5100055776, 5100047362 |
| RD24-100o DPF | RD24-100o DPF | 5100047393 |
| RD45-140c.3 | RD45-140c.3 | 5100047398 |
| RD45-140 C Tandem Roller | RD45-140 C | 5100011394 |
| RD28-120o | RD28-120o | 5100047379 |
| RD18 | RD18-100.3 | 5100055947 |
| RD28-120 C Tandem Roller | RD28-120C US | 5100021758 |
| RD18-80 Tandem Roller | RD18-80 US | 5100027572 |
| RD28-120 Tandem Roller | RD28-120 US | 5100021756 |
| RD45-140 O Tandem Roller | RD45-140O US | 5100021806 |
| RD40-130c DPF | RD40-130c DPF | 5100055779 |
| RD40-130o | RD40-130o | 5100047386 |
| RD24-100c.3 | RD24-100c.3 | 5100047370 |
| RD27-120 | RD 27-120.3 | 5100032198 |
| RD40-130 O Tandem Roller | RD40-130O US | 5100021805 |
| RD28-120o DPF | RD28-120o DPF | 5100047394 |
| RD40-130o DPF | RD40-130o DPF | 5100055781 |
| RD27-120c | RD27-120c.3 | 5100047371 |
| RD27-120o | RD27-120o.3 | 5100047373 |
| RD45-140.3 | RD45-140.3 | 5100047396 |
| RD45-140 DPF | RD45-140 DPF | 5100055778 |
| RD40-130 C Tandem Roller | RD40-130 C | 5100011393 |
| RD24-100 | RD24-100 | 5100047374, 5100011385 |
| RD40-130.3 | RD40-130.3 | 5100047395 |
| RD24-100c | RD24-100c | 5100047376 |
| RD45-140c | RD45-140c | 5100047385 |
| RD45-140o.3 | RD45-140o.3 | 5100047400 |
| Vibration Roller | RD18-100 SE | 5100044989 |
| RD28-120 O Tandem Roller | RD28-120O US | 5100021800 |
| RD40-130c | RD40-130c | 5100047384 |
| RD24-100 DPF | RD24-100 DPF | 5100047380 |
| RD24-100 C Tandem Roller | RD24-100C US | 5100021757 |
| RD24-100 C Tandem Rollers | RD24-100 C | 5100011387 |
| RD24-100 O Tandem Roller | RD24-100 O | 5100011389 |
| RD45-140 O Tandem Roller | RD45-140 O | 5100011396 |
| RD28-120c DPF | RD28-120c DPF | 5100047392 |
| RD24-100c DPF | RD24-100c DPF | 5100047391 |
| RD18-100 C Tandem Roller | RD18-100 C | 5100011384 |
| RD27-120 C Tandem Roller | RD27-120 C | 5100011388 |
| RD18-100c.3 | RD18-100c.3 | 5100055948 |
| RD24-100 Tandem Roller | RD24-100 US | 5100021755 |
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.
