The Wacker Neuson Worm 4.250 C.D. is a genuine OEM component designed for the CRT36 and CRT48 series ride-on concrete power trowels. Sourced directly from Wacker Neuson, this part meets the exact specifications required for proper drivetrain operation across a wide range of CRT models. Fitment covers CRT36-24A, CRT36-25, CRT36-26A, CRT48-31V, CRT48-33K, CRT48-34V, CRT48-35L, CRT48-35V, CRT48-37V, CRT48-57K, and associated variants including Power Steer and Dual-Fuel configurations. When you order part number, you are getting the same component installed at the factory — no guesswork on fit or compatibility.
Key Features
- Genuine OEM Worm Gear Accuracy — Manufactured to Wacker Neuson's exact tooth profile and 4.250 C.D. (center distance) specification, ensuring correct mesh engagement within the gearbox assembly.
- Direct Drop-In Installation — Matches the original mounting geometry and shaft interface of the CRT drivetrain, allowing straightforward installation without reworking adjacent components.
- Broad CRT Series Coverage — Fits a wide range of 36-inch and 48-inch Wacker Neuson ride-on trowel models, including standard, high-speed, Power Steer, and Dual-Fuel variants.
- Sustained Trowel Blade Speed Control — A correctly functioning worm gear maintains consistent rotational output to the trowel rotor; a worn or damaged worm causes erratic blade speed, uneven finishing, and accelerated wear on mating gearbox components.
- Verified OEM Part Number — Cross-reference 5000117973 against your machine's serial tag and parts manual to confirm fitment before installation.
The worm gear is a core element of the ride-on trowel's gearbox, converting input torque from the engine or motor into the rotational force that drives the trowel rotor and finishing blades. It works in mesh with a mating worm wheel to step down speed and multiply torque, giving the operator precise control over blade pitch and finishing pressure. When this gear wears or fails, the gearbox loses efficiency — symptoms include slipping under load, abnormal noise, excessive heat, and degraded surface finish quality on freshly poured concrete slabs.
Part Details
| Part Number | 5000117973 |
|---|---|
| Old Part Number | 0117973 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Worm 4.250 C.D. |
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 High Speed Ride-On Trowel | CRT48-31V-H | 5000009086 |
| 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-E | 5000009481 |
| 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 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.
