The Wacker Neuson Square Key 3/8 X 4 is a genuine OEM component designed for the CRT48 series ride-on concrete trowels. As a direct-from-manufacturer replacement, part delivers the exact dimensions and material grade required to maintain proper power transmission between rotating shafts and drive components. This key fits an extensive range of CRT48 variants — including the CRT48-35L, CRT48-35V, CRT48-33K, CRT48-34V, CRT48-37V, CRT48-57K, and their Power Steer and Dual-Fuel configurations — making it a high-demand service item across the CRT48 product family. Sourcing the correct OEM square key ensures the interface between your shaft and hub holds precise alignment under the demanding loads of finish troweling operations.
Key Features
- Exact OEM Dimensions — Manufactured to the original 3/8 X 4 specification, ensuring correct fit in the keyway without shimming or modification.
- Genuine Wacker Neuson Part — Sourced directly from Wacker Neuson, so material hardness and shear strength match the original engineering intent for CRT48 drive systems.
- Broad CRT48 Coverage — Compatible with CRT48-35L, CRT48-35V, CRT48-33K, CRT48-34V, CRT48-37V, CRT48-57K, and associated Power Steer, Dual-Fuel, and EU variants.
- Positive Power Transfer — A correctly seated square key locks the shaft and hub together, enabling the rotor blades to deliver consistent, controlled troweling force across the slab surface.
- Direct Drop-In Replacement — Slots into the existing keyway on the shaft, allowing straightforward installation during routine drivetrain service or after key shear caused by overload.
A square key is a small but load-critical component that sits in a machined slot — called a keyway — between a rotating shaft and a mating hub or gear. Its job is to transmit rotational force from the shaft to the driven component, preventing slippage under torque. In a ride-on concrete trowel like the CRT48, the drive system must deliver consistent, high-torque rotation to the trowel rotor arms. When a square key wears, corrodes, or shears from an impact or overload event, the shaft spins freely inside the hub and the rotor loses drive entirely — bringing finishing work to a halt. Replacing the key promptly with the correct OEM piece restores full drive engagement and protects surrounding shaft and hub surfaces from further damage.
Part Details
| Part Number | 5000151705 |
|---|---|
| Old Part Number | 0151705 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Square Key 3/8 X 4 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| CRT48-35L Trowel | CRT48-35L | 5000620113, 5000620806 |
| CRT48-35V | CRT48-35V | 5000620112 |
| CRT48-35V | CRT48-35V EU | 5000620807 |
| 1220mm/48in Ride-on Trowel | CRT48-34V | 5000620805, 5000620075, 5200004935 |
| 1220mm/48in Ride-on Trowel | CRT48-31V | 5000620476 |
| CRT48-35L-PS | CRT48-35L-PS | 5000620704 |
| CRT48-35L-PS | CRT48-35L-PS EU | 5000620900 |
| CRT48-33K | CRT48-33K | 5200002353 |
| CRT48-33K Trowel, Dual-Fuel | CRT48-33K DF | 5200007686, 5200007687 |
| CRT48-33K | CRT48-33k | 5200002354 |
| CRT48-57K Trowel, Power Steer | CRT48-57k-PS | 5200018779 |
| CRT48-37V Trowel | CRT48-37V | 5100024209 |
| CRT48-57K Trowel | CRT48-57K-MS | 5100018892 |
| CRT48-37V Trowel, Power Steer | CRT48-37V-PS | 5100024291 |
| CRT48-57K-PS | CRT48-57k-PS EU | 5200018820 |
| CRT48-35V, Power Steer | CRT48-35V-PS | 5200016909 |
| CRT48-37V | CRT48-37V EU | 5100024290 |
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.
