The Wacker Neuson Gear Key is a genuine OEM component designed for the CT36 and CT48 series walk-behind concrete power trowels. As a direct OEM replacement, it is manufactured to the same specifications as the original part, ensuring a correct fit within the drivetrain assembly. This part covers an extensive range of CT-series trowels, including CT36-5A, CT36-6, CT36-8A, CT36-9, CT36-400E, CT36-X, CT48-8A, CT48-9, CT48-11A, and CT48-13A-V variants. Keeping this small but critical component in good condition helps maintain the integrity of the gear engagement across the trowel's blade drive system.
Key Features
- Genuine OEM Construction — Manufactured to the same material hardness and dimensional tolerances as the original, ensuring the key seats correctly in the gear and shaft without play or slippage.
- Drop-In Drivetrain Fit — Installs directly into the existing keyway on the gear shaft with no machining or modification to the housing or shaft required.
- Broad CT-Series Coverage — Compatible with a wide range of CT36 and CT48 walk-behind concrete power trowel models, including standard, variable-pitch, and EU-spec variants.
- Torque Transfer Integrity — A correctly fitted gear key locks rotational alignment between shaft and gear, maintaining consistent blade speed and smooth trowel operation across the finishing pass.
- Compact Critical Component — Though small in size, this key is a load-bearing element in the gear assembly; a worn or missing key causes gear slippage, uneven blade rotation, and potential drivetrain damage.
A gear key is a small, precision-machined metal component that fits into a machined slot — called a keyway — cut into both a shaft and the bore of a mating gear or sprocket. Its role is to lock the two parts together rotationally so that torque is transferred reliably from the shaft to the gear without slipping. In a walk-behind concrete power trowel like the CT36 or CT48, the gear key is part of the blade drive system that keeps the finishing blades spinning at the correct speed and in sync. When the key wears, shears, or goes missing, the gear can spin independently of the shaft, causing erratic blade behavior, loss of troweling speed, and potential damage to surrounding drivetrain components.
Part Details
| Part Number | 5000158852 |
|---|---|
| Old Part Number | 0158852 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Gear Key |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| CT36-8A-V | CT36-8A-V | 5000620832, 5000009442 |
| CT36-8A Trowel | CT36-8A | 5000009439, 5000620831 |
| CT48-8A Trowel | CT48-8A | 5000009449 |
| CT48-11A Trowel | CT48-11A | 5000009450, 5000620835 |
| CT48-13A-V Trowel | CT48-13A-V | 5000009452, 5000620836 |
| CT48-8A | CT48-8A EU | 5000620837 |
| CT36-400E Trowel | CT36-400E | 5000009448, 5000620828 |
| CT36-5A Trowel | CT36-5A | 5000009438, 5200016256 |
| CT36-5A | CT36-5A EU | 5000620829 |
| CT36-9-V Trowel | CT36-9-V | 5000009447, 5000620834 |
| CT36-5A-C Trowel | CT36-5A-C | 5000620040 |
| CT36-9 Trowel | CT36-9 | 5000009444, 5000620833 |
| 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.
