The Wacker Neuson 5100011985 is a genuine OEM O-Ring Seal designed for the RD18, RD24, RD27, and RD28 series tandem rollers. As a factory-sourced component, it is manufactured to the exact material grade and dimensional tolerances required by Wacker Neuson for these machines. This seal covers an extensive range of RD-series configurations, including smooth drum, combination, open drum, DPF, and cab variants across multiple market designations. When a worn or damaged O-ring needs to be replaced, using part number 5100011985 ensures the correct sealing surface contact and compression behavior for the application.
Key Features
- Correct Material Grade for Dynamic Sealing: — Manufactured to OEM compound and durometer specifications, ensuring the seal compresses and recovers correctly in the hydraulic or fluid circuit it serves.
- Drop-In Dimensional Fit: — Sized to the exact inner diameter and cross-section of the original groove, seating without modification in the target bore or fitting.
- Broad RD-Series Coverage: — Compatible with RD18, RD24, RD27, and RD28 tandem rollers across smooth drum, open drum, combination drum, cab, and DPF configurations, including US and SE market variants.
- Prevents Fluid Loss and Contamination: — A correctly functioning O-ring maintains circuit pressure and keeps contaminants out of sensitive hydraulic or lubrication passages; a failed seal leads to leaks, pressure drop, and accelerated component wear.
- Genuine Wacker Neuson OEM Part: — Sourced directly from Wacker Neuson, part 5100011985 meets the same specifications as the seal installed at the factory, with no substitution of materials or geometry.
An O-ring seal is a small but critical loop of elastomeric material fitted into a machined groove to create a pressure-tight barrier between two mating surfaces or around a shaft, fitting, or port. In tandem rollers like the RD18, RD24, RD27, and RD28 series, O-rings are used throughout the hydraulic drive system, vibration circuit, and ancillary fluid passages to prevent leaks and maintain operating pressure. When an O-ring hardens, cracks, or is cut during disassembly, it loses its ability to seal, resulting in fluid seepage, loss of hydraulic pressure, or contamination ingress that can damage pumps, motors, and valves downstream.
Part Details
| Part Number | 5100011985 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | O-Ring Seal |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD28-120 Tandem Roller | RD28-120 US | 5100021756 |
| RD24-100c | RD24-100c | 5100047376 |
| RD18-80 | RD18-80 | 5100047360, 5100011382, 5100055774 |
| RD24-100 C Tandem Roller | RD24-100C US | 5100021757 |
| RD24-100 DPF | RD24-100 DPF | 5100047380 |
| RD18-100c.3 | RD18-100c.3 | 5100055948 |
| RD28-120 | RD28-120 | 5100047375 |
| RD18 | RD18-100.3 | 5100055947 |
| Vibration Roller | RD18-100c 3 | 5100047363 |
| RD28-120 O Tandem Roller | RD28-120O US | 5100021800 |
| RD 24-100.3 | RD 24-100.3 | 5100032197 |
| RD28-120c | RD28-120c | 5100047377 |
| RD27-120 Tandem Roller | RD27-120 | 5100011386 |
| RD18-100 | RD18-100 | 5100055775, 5100011383, 5100047361 |
| RD28-120 C Tandem Roller | RD28-120C US | 5100021758 |
| RD27-120 | RD 27-120.3 | 5100032198 |
| RD27-120c | RD27-120c.3 | 5100047371 |
| RD28-120c DPF | RD28-120c DPF | 5100047392 |
| RD 18-100 C | RD18-100c | 5100047362, 5100055776 |
| RD27-120o | RD27-120o.3 | 5100047373 |
| RD24-100c.3 | RD24-100c.3 | 5100047370 |
| RD18-100 Tandem Roller | RD18-100 US | 5100027573 |
| RD24-100o.3 | RD24-100o.3 | 5100047372 |
| RD24-100o | RD24-100o | 5100047378 |
| Vibration Roller | RD18-100 SE | 5100044989 |
| RD24-100 C Tandem Rollers | RD24-100 C | 5100011387 |
| RD18-80 Tandem Roller | RD18-80 US | 5100027572 |
| RD28-120o DPF | RD28-120o DPF | 5100047394 |
| RD24-100 Tandem Roller | RD24-100 US | 5100021755 |
| RD18-100 C Tandem Roller | RD18-100 C US | 5100027574 |
| RD24-100o DPF | RD24-100o DPF | 5100047393 |
| RD28-120 DPF | RD28-120 DPF | 5100047390 |
| Vibration Roller | RD18-80 SE | 5100044988 |
| RD24-100 O Tandem Roller | RD24-100 O | 5100011389 |
| RD27-120 O Tandem Roller | RD27-120 O | 5100011390 |
| RD24-100 Tandem Roller | RD24-100 | 5100011385, 5100047374 |
| RD18-100 C Tandem Roller | RD18-100 C | 5100011384 |
| RD24-100 O Tandem Roller | RD24-100O US | 5100021759 |
| RD28-120o | RD28-120o | 5100047379 |
| RD24-100c DPF | RD24-100c DPF | 5100047391 |
| RD18-80.3 | RD18-80.3 | 5100055946 |
| RD27-120 C Tandem Roller | RD27-120 C | 5100011388 |
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.
