The Wacker Neuson 5100011933 Cup Spring is a genuine OEM component designed for the RD27-120 and RD28-120 series tandem rollers. Sourced directly from Wacker Neuson, this cup spring meets the exact specifications required for correct installation and consistent performance in your machine. Fitment covers a wide range of RD27-120 and RD28-120 variants, including standard, combination, open-drum, DPF-equipped, and electric models. When you order by part number 5100011933, you can be confident you are receiving the correct part for your roller.
Key Features
- Genuine OEM Compression Integrity — Manufactured to the precise spring rate and dimensional tolerances required for correct clamping and load distribution in the RD27/RD28 drivetrain.
- Drop-In Installation — Matches the original seating geometry, so the cup spring seats and loads correctly without rework or shimming.
- Broad RD-Series Coverage — Fits RD27-120 and RD28-120 tandem rollers across standard, open-drum, combination, DPF, and electric configurations.
- Sustained Clamping Force — A cup spring that has lost its spring rate causes inconsistent preload, which accelerates wear on adjacent components. This genuine replacement restores correct tension.
- Verified Part Number — Part number 5100011933 is confirmed against Wacker Neuson service documentation for every model listed in the fitment data.
A cup spring — also called a Belleville washer or disc spring — is a conically shaped washer designed to apply and maintain a precise axial clamping force within a bolted or pressed assembly. In tandem rollers like the RD27-120 and RD28-120, cup springs are used where consistent preload must be sustained across a range of temperatures, vibration loads, and operational cycles. When a cup spring fatigues or takes a permanent set, the clamping force it was providing drops off, which can lead to loosening, increased wear on mating surfaces, and potential mechanical failure in the surrounding assembly. Replacing a worn cup spring with a genuine OEM part like the 5100011933 restores the designed preload and protects the integrity of the components it supports.
Part Details
| Part Number | 5100011933 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Cup Spring |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD28e-120 | RD28-120e | 5100066732 |
| RD27-120 O Tandem Roller | RD27-120 O | 5100011390 |
| RD28-120 O Tandem Roller | RD28-120O US | 5100021800 |
| RD28-120c DPF | RD28-120c DPF | 5100047392 |
| RD28-120 C Tandem Roller | RD28-120C US | 5100021758 |
| RD28-120o DPF | RD28-120o DPF | 5100047394 |
| RD27-120c | RD27-120c.3 | 5100047371 |
| RD28-120o | RD28-120o | 5100047379 |
| RD28-120 | RD28-120 | 5100047375 |
| RD28-120c | RD28-120c | 5100047377 |
| RD28e-120c | RD28-120ce | 5100066734 |
| RD27-120 C Tandem Roller | RD27-120 C | 5100011388 |
| RD28e-120o | RD28-120oe | 5100066736 |
| RD27-120 | RD 27-120.3 | 5100032198 |
| RD27-120 Tandem Roller | RD27-120 | 5100011386 |
| RD27-120o | RD27-120o.3 | 5100047373 |
| RD28-120 DPF | RD28-120 DPF | 5100047390 |
| RD28-120 Tandem Roller | RD28-120 US | 5100021756 |
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.
