The Wacker Neuson 5100011922 is a genuine OEM Locking Washer designed for the RD-series tandem rollers, covering a wide range of walk-behind and ride-on articulated models from the RD18 through the RD45 family. As a direct OEM replacement, the 5100011922 is manufactured to the same material and dimensional standards as the original hardware, ensuring consistent clamping force and thread protection across every application it serves. This Locking Washer is confirmed to fit numerous RD18, RD24, RD27, RD28, RD40, and RD45 configurations, including standard, combination, open-drum, DPF, and SE variants. Sourcing the correct OEM part by 5100011922 is the fastest way to keep your tandem roller back in service without guesswork.
Key Features
- OEM Material and Dimensional Accuracy — Manufactured to the original hardness and geometry specifications that ensure correct clamping load and reliable thread engagement on RD-series fastener assemblies.
- Drop-In Hardware Replacement — Matches the original hole diameter, outer diameter, and tab profile, so it seats and locks without rework or modification to surrounding hardware.
- Broad RD-Series Compatibility — Fits RD18, RD24, RD27, RD28, RD40, and RD45 tandem roller models, including standard, combination drum, open-drum, DPF-equipped, and SE variants across multiple production series.
- Prevents Fastener Back-Out — A properly functioning locking washer maintains fastener torque under sustained vibration; a worn or missing washer allows critical bolts to loosen during compaction cycles, risking component damage.
- Genuine Wacker Neuson OEM Part — Supplied as an authorized OEM component under part number 5100011922, matching the hardware originally installed on these machines at the factory.
A locking washer is a small but essential piece of fastener hardware that resists rotational loosening caused by vibration and dynamic loading. In a tandem roller, where the entire machine generates sustained vibratory force during asphalt and soil compaction passes, fasteners without proper locking hardware are vulnerable to backing out over time. When a locking washer fails or is omitted, the fastener joint loses clamping force, which can lead to component movement, accelerated wear on mating surfaces, and — in critical assemblies — mechanical failure. Replacing a worn or damaged locking washer with the correct OEM part restores the integrity of the fastener joint and protects the components it secures.
Part Details
| Part Number | 5100011922 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Locking Washer |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD24-100 Tandem Roller | RD24-100 US | 5100021755 |
| RD28-120 C Tandem Roller | RD28-120C US | 5100021758 |
| RD18-100 Tandem Roller | RD18-100 US | 5100027573 |
| RD27-120o | RD27-120o.3 | 5100047373 |
| RD40-130 | RD40-130 | 5100047382 |
| RD40-130c.3 | RD40-130c.3 | 5100047397 |
| RD24-100c | RD24-100c | 5100047376 |
| RD18-100c.3 | RD18-100c.3 | 5100055948 |
| RD45-140c DPF | RD45-140c DPF | 5100055780 |
| RD24-100 | RD24-100 | 5100047374, 5100011385 |
| RD40-130.3 | RD40-130.3 | 5100047395 |
| RD40-130 DPF | RD40-130 DPF | 5100055777 |
| RD45-140 DPF | RD45-140 DPF | 5100055778 |
| RD28-120c DPF | RD28-120c DPF | 5100047392 |
| RD40-130c | RD40-130c | 5100047384 |
| RD24-100c DPF | RD24-100c DPF | 5100047391 |
| RD24-100 O Tandem Roller | RD24-100O US | 5100021759 |
| RD18-100 C Tandem Roller | RD18-100 C | 5100011384 |
| RD40-130c DPF | RD40-130c DPF | 5100055779 |
| RD40-130o DPF | RD40-130o DPF | 5100055781 |
| RD28-120c | RD28-120c | 5100047377 |
| Vibration Roller | RD18-100 SE | 5100044989 |
| RD45-140c.3 | RD45-140c.3 | 5100047398 |
| RD24-100 C Tandem Rollers | RD24-100 C | 5100011387 |
| RD18-80.3 | RD18-80.3 | 5100055946 |
| RD27-120 C Tandem Roller | RD27-120 C | 5100011388 |
| RD18-80 Tandem Roller | RD18-80 US | 5100027572 |
| RD45-140 Tandem Roller | RD45-140 US | 5100021802 |
| RD40-130 Tandem Roller | RD40-130 US | 5100021801 |
| RD40-130o | RD40-130o | 5100047386 |
| RD40-130 O Tandem Roller | RD40-130O US | 5100021805 |
| RD27-120c | RD27-120c.3 | 5100047371 |
| RD18-80 | RD18-80 | 5100055774, 5100011382, 5100047360 |
| RD24-100 O Tandem Roller | RD24-100 O | 5100011389 |
| RD28-120 | RD28-120 | 5100047375 |
| RD18-100c | RD18-100c | 5100055776, 5100047362 |
| RD45-140 | RD45-140 | 5100047383 |
| RD27-120 O Tandem Roller | RD27-120 O | 5100011390 |
| RD28-120 DPF | RD28-120 DPF | 5100047390 |
| Vibration Roller | RD18-100c 3 | 5100047363 |
| RD28-120o | RD28-120o | 5100047379 |
| RD40-130 C Tandem Roller | RD40-130C US | 5100021803 |
| RD45-140.3 | RD45-140.3 | 5100047396 |
| RD28-120o DPF | RD28-120o DPF | 5100047394 |
| RD28-120 O Tandem Roller | RD28-120O US | 5100021800 |
| RD24-100o DPF | RD24-100o DPF | 5100047393 |
| Vibration Roller | RD18-80 SE | 5100044988 |
| RD24-100o | RD24-100o | 5100047378 |
| RD 24-100.3 | RD 24-100.3 | 5100032197 |
| RD18-100 C Tandem Roller | RD18-100 C US | 5100027574 |
| RD45-140c | RD45-140c | 5100047385 |
| RD45-140 C Tandem Roller | RD45-140C US | 5100021804 |
| RD40-130o.3 | RD40-130o.3 | 5100047399 |
| RD45-140o DPF | RD45-140o DPF | 5100055782 |
| RD24-100c.3 | RD24-100c.3 | 5100047370 |
| RD24-100o.3 | RD24-100o.3 | 5100047372 |
| RD27-120 Tandem Roller | RD27-120 | 5100011386 |
| RD18-100 Tandem Roller | RD18-100 | 5100011383, 5100055775, 5100047361 |
| RD27-120 | RD 27-120.3 | 5100032198 |
| RD45-140 O Tandem Roller | RD45-140O US | 5100021806 |
| RD24-100 C Tandem Roller | RD24-100C US | 5100021757 |
| RD45-140o | RD45-140o | 5100047387 |
| RD24-100 DPF | RD24-100 DPF | 5100047380 |
| RD45-140o.3 | RD45-140o.3 | 5100047400 |
| RD28-120 Tandem Roller | RD28-120 US | 5100021756 |
| RD18 | RD18-100.3 | 5100055947 |
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.
