The Wacker Neuson Square Key 1/4 X 1 is a genuine OEM component designed for the CRT36 and CRT48 series ride-on concrete trowels. This small but critical drive component is sourced directly from Wacker Neuson, ensuring it meets the exact material and dimensional specifications required for proper power transmission within the drivetrain. Fitment spans a wide range of CRT models, including the CRT36-24A, CRT36-25, CRT36-26A, CRT48-31V, CRT48-33K, CRT48-34V, CRT48-35L, CRT48-35V, CRT48-37V, CRT48-57K, and associated variants. Ordering by part number confirms you are getting the correct OEM piece for your machine.
Key Features
- Exact OEM Material Grade — Manufactured to Wacker Neuson's specified hardness and shear tolerances for positive torque transfer without premature wear or deformation.
- Drop-In Shaft Compatibility — Machined to the precise 1/4 x 1 square profile, seating cleanly into mating keyways on CRT drivetrain shafts with no filing or fitting required.
- Broad CRT Series Coverage — A single part number covers both 36-inch and 48-inch ride-on trowel platforms, including standard, high-speed, power steer, dual-fuel, and electronic steering variants.
- Maintains Drive Integrity — A correctly fitted square key locks rotating components to their shaft, preventing slippage that would cause uneven rotor speed and inconsistent concrete finishing results.
- Fuel and Configuration Agnostic — Fits gas, dual-fuel, and electric-assist CRT variants, making it a practical stock item for fleets running mixed configurations.
A square key is a small rectangular steel component that sits in a machined slot — called a keyway — cut into both a shaft and a mating hub or gear. Its job is to lock the two parts together rotationally so torque is transferred from the shaft to the driven component without slipping. On a ride-on concrete trowel, this type of key is used in the drivetrain to keep trowel-arm drive components positively engaged with their shafts. When a key shears or wears, the driven component can spin freely on the shaft, resulting in lost drive to one or more trowel arms, uneven finishing passes, and potential damage to surrounding shaft and hub surfaces if the machine continues to run.
Part Details
| Part Number | 5000027751 |
|---|---|
| Old Part Number | 0027751 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Square Key 1/4 X 1 |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| CRT48-35L Trowel | CRT48-35L | 5000620113, 5000620806 |
| CRT48-35V | CRT48-35V | 5000620112 |
| CRT48-35V | CRT48-35V EU | 5000620807 |
| 915mm/36in Ride-on Trowel | CRT36-25 | 5000620115, 5000620295, 5000620803, 5000620804 |
| 1220mm/48in Ride-on Trowel | CRT48-34V | 5000620805, 5000620075, 5200004935 |
| 1220mm/48in Ride-on Trowel | CRT48-31V | 5000620476 |
| 915mm/36in Ride-On Trowel | CRT36-24A | 5000620080, 5000620299, 5000620801, 5000620802 |
| 1220mm/48in Low Speed Ride-On Trowel | CRT48-25K-L | 5000009084 |
| 1220mm/48in High Speed Ride-On Trowel | CRT48-25K-H | 5000009085 |
| 915mm/36in Ride-On High Speed Trowel | CRT36-23K-H | 5000009083 |
| 915mm/36in Ride-On High Speed Trowel | CRT36-24A-H | 5000009232 |
| CRT48-35L-PS | CRT48-35L-PS | 5000620704 |
| CRT48-35L-PS | CRT48-35L-PS EU | 5000620900 |
| Ride-on Trowel | CRT48-31V-ES-E | 5000009482 |
| Ride-on Trowel | CRT36-24A-E | 5000009483 |
| CRT36-26A Trowel w/Wheel Kit | CRT36-26A | 5000621000, 5000620999, 5000621001, 5000621002 |
| 1220mm/48in High Speed Ride-On Trowel | CRT48-31V-H | 5000009086 |
| 1220mm/48in Ride-on Trowel, El ectronic Steering | CRT48-31V-ES | 5000009216 |
| CRT48-33K | CRT48-33K | 5200002353 |
| CRT48-33K Trowel, Dual-Fuel | CRT48-33K DF | 5200007686, 5200007687 |
| 915mm/36in Ride-On High Speed Trowel | CRT36-25K-H | 5000620027 |
| CRT48-33K | CRT48-33k | 5200002354 |
| CRTv 36-26A Trowel, w/Wheel Kit | CRTv36-26A | 5200008544, 5200008545, 5200008546 |
| 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.
