The Wacker Neuson Governor Gear Complete is a genuine OEM component designed for the RD12-90 Tandem Roller and CRT36-25 Ride-on Trowel series. As a direct factory part, the is produced to the same tolerances and specifications as the original, ensuring consistent engagement and accurate speed regulation in the engine's governor system. This assembly covers both solid ROPS and foldable ROPS variants of the RD12-90, as well as standard and Wheel Kit-equipped CRT36-25 trowels, making it the correct choice across the full range of compatible machines. When a worn or damaged governor gear is causing erratic engine speed or loss of throttle response, replacing it with the genuine Wacker Neuson restores precise governor control and protects engine longevity.
Key Features
- OEM Gear Tooth Accuracy — Manufactured to original mesh tolerances, ensuring smooth, chatter-free engagement with the governor shaft and consistent RPM regulation under load.
- Drop-In Assembly Replacement — Supplied as a complete gear assembly that installs directly into the existing governor housing with no additional fabrication or adaptation.
- Broad Model Coverage — Fits the RD12-90 Tandem Roller (solid ROPS and foldable ROPS variants) and the CRT36-25 Ride-on Trowel (standard and Wheel Kit configurations).
- Restored Engine Speed Control — A correctly functioning governor gear maintains stable engine RPM across varying load conditions, preventing over-revving and protecting downstream drivetrain components.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, carrying the same part number — 5000215191 — used by authorized dealers and service centers worldwide.
The governor gear is a critical link in the engine's speed-regulation system. It transfers rotational motion from the camshaft or crankshaft to the governor mechanism, which continuously adjusts the throttle to maintain a set engine speed regardless of changes in load. When the gear wears down or loses teeth, the governor loses its ability to read engine speed accurately, resulting in surging, hunting, or uncontrolled RPM changes — conditions that accelerate engine wear and can affect the performance and consistency of the compaction or finishing work the machine is carrying out. Replacing a worn governor gear promptly keeps the engine running at its intended operating speed and protects the broader powertrain from strain caused by unchecked RPM fluctuations.
Part Details
| Part Number | 5000215191 |
|---|---|
| Old Part Number | 0215191 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Governor Gear Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD12-90 ROLLER, DOUBLE DRUM, SOLID ROPS | RD12-90 | 5000620059, 5000620321 |
| 915mm/36in Ride-on Trowel | CRT36-25 | 5000620115, 5000620295 |
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.
