The Wacker Neuson Rotex Coupler Assembly is a genuine OEM component designed for the RD27-100 and RD27-120 series ride-on tandem rollers. Sourced directly from Wacker Neuson, this OEM part is manufactured to the same specifications as the original, ensuring a direct fit across the full RD27 lineup — including Pro and Basic T4F variants. The is the correct replacement for all documented RD27-100 and RD27-120 machine configurations, giving you confidence that you are ordering the right part the first time.
Key Features
- Genuine OEM Coupling Integrity — Manufactured to the original torque-transfer and torsional-damping specification for the RD27 drivetrain, maintaining the flexible coupling performance the hydrostatic system depends on.
- Direct Bolt-In Replacement — Matches the original mounting bore, spider element interface, and hub dimensions of the RD27-100 and RD27-120, dropping straight into the existing drivetrain without machining or shimming.
- Broad RD27 Series Coverage — Confirmed fitment across RD27-100 and RD27-120 configurations, including Hydrostatic Vibratory Roller, Ride-On Roller, Pro Tandem Roller, and both Pro and Basic T4F variants.
- Drivetrain Shock Absorption — The Rotex flexible element within the assembly dampens rotational shock loads between the hydraulic motor and driven component, protecting downstream drivetrain parts from impact fatigue.
- Hydraulic System Protection — A worn or failed coupler assembly can transmit damaging vibration and torque spikes into the hydrostatic circuit; replacing it promptly preserves pump and motor service life.
A Rotex coupler assembly is a flexible jaw-type coupling used to transmit rotational power between a drive source — typically a hydraulic motor — and a driven shaft or gearbox. The assembly consists of two hubs and a flexible elastomeric spider element seated between them. That spider element absorbs torsional shock and minor misalignment, preventing damaging load spikes from passing through the drivetrain. When the elastomeric element degrades, cracks, or fails completely, drive becomes erratic, vibration increases noticeably, and continued operation risks damage to the hydraulic motor, pump, or connected drive components on the roller.
Part Details
| Part Number | 5000189414 |
|---|---|
| Old Part Number | 0189414 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Rotex Coupler Assembly |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Hydrostatic Vibratory Roller | RD27-100 | 5200005878, 5200014868, 5200023554, 5200023556, 5200005876, 5200021387 |
| Hydrostatic Vibratory Roller | RD27-120 | 5200005879, 5200014869, 5200014922, 5200014923, 5200023555, 5200023557, 5200024441, 5200005877, 5200021389 |
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.
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