The Wacker Neuson is a genuine OEM Small Gearbox Complete designed for the CT36 and CT48 series walk-behind concrete power trowels. Sourced directly through Wacker Neuson's authorized parts network, this assembly meets the exact specifications required for proper trowel operation across multiple CT-series configurations. Fitment covers a wide range of CT36 and CT48 models, including the CT36-5A, CT36-5A-C, CT36-6, CT36-X, CT36-X-C, CT48-8A, CT48-9, and their respective EU variants. Order with confidence knowing the is the correct OEM replacement for your machine.
Key Features
- OEM Gear Tolerancing: — Manufactured to Wacker Neuson's original gear mesh and backlash specifications, ensuring the gearbox transfers engine torque to the trowel arms without slippage or premature wear.
- Drop-In Assembly Replacement: — Supplied as a complete gearbox unit, installing directly into the existing mounting position on CT36 and CT48 trowel frames with no additional modification to surrounding hardware.
- Broad CT-Series Coverage: — Compatible with CT36-5A, CT36-5A-C, CT36-6, CT36-X, CT36-X-C, CT48-8A, CT48-9, and EU-variant models, making it a single-part solution across the CT walk-behind trowel lineup.
- Smooth Blade Speed Control: — A correctly functioning gearbox maintains consistent blade pitch adjustment response; a worn or damaged unit causes erratic blade arm movement and uneven concrete finishing results.
- Genuine OEM Durability: — As an authentic Wacker Neuson part, the 5000158684 is built from the same materials and to the same assembly standards as the unit that came installed on your trowel from the factory.
The small gearbox on a walk-behind concrete power trowel is the mechanical link between the engine drive and the rotating trowel arms. It converts and transmits rotational power while allowing the operator to adjust blade pitch angle for different stages of the finishing pass. When the gearbox wears or fails, blade arms may lose consistent speed or pitch control, resulting in an uneven surface finish and forcing work stoppages mid-pour. Replacing the unit with the correct OEM assembly restores full mechanical control and keeps finishing operations running on schedule.
Part Details
| Part Number | 5000158684 |
|---|---|
| Old Part Number | 0158684 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Small Gearbox Complete |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| CT48-8A Trowel | CT48-8A | 5000009449 |
| CT48-8A | CT48-8A EU | 5000620837 |
| CT36-5A Trowel | CT36-5A | 5000009438, 5200016256 |
| CT36-5A | CT36-5A EU | 5000620829 |
| CT36-5A-C Trowel | CT36-5A-C | 5000620040 |
| CT36-6 Trowel | CT36-6 | 5000009443, 5000620830 |
| CT48-9 Trowel | CT48-9 | 5000009453, 5000620838 |
| 915mm/36in, Walk-Behind Trowel | CT36-X | 5000620036 |
| 915mm/36in, Walk-behind Trowel | CT36-X-C | 5000620039, 5200015336 |
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.
