Wacker Neuson 5000165520 Square Key

The Wacker Neuson 5000165520 is a genuine OEM Square Key designed for the CRT36 and CRT48 series ride-on concrete power trowels. As a direct Wacker Neuson OEM part, the 5000165520 is manufactured to the exact dimensions required for proper torque transfer and shaft engagement across a wide range of CRT trowel configurations. This Square Key fits an extensive range of CRT models spanning 36-inch and 48-inch rotor sizes, including standard, variable-speed, power steer, and dual-fuel variants. Choosing the correct OEM key ensures the driven component stays positively locked to the shaft under the sustained rotational loads produced during concrete finishing operations.

Key Features

• Exact OEM Dimensions — Manufactured to precise width, height, and length tolerances so the key fills the keyway without play, delivering full torque transfer from shaft to hub.
• Genuine Wacker Neuson Part — Sourced directly from Wacker Neuson, part number 5000165520 carries the same material spec as the key installed at the factory.
• Broad CRT Series Coverage — Fits CRT36 and CRT48 ride-on concrete trowels across multiple model generations, including power steer and dual-fuel configurations.
• Positive Shaft Locking Under Load — A correctly seated square key prevents hub slippage during finishing passes, maintaining consistent rotor speed and blade pressure across fresh concrete.
• Direct Drop-In Replacement — Dimensioned to seat fully in the existing keyway without filing or shimming, supporting a straightforward service turnaround in the field or shop.

A square key is a small but load-critical drivetrain component that sits in a machined slot — the keyway — cut into both a shaft and its mating hub or gear. It creates a positive mechanical connection between the two, ensuring that rotational force from the shaft is transmitted directly to the driven component rather than allowing the hub to spin freely. On a ride-on concrete trowel, this coupling is under continuous cyclic stress as the rotor assembly works across a concrete slab. When a square key shears, deforms, or works loose, the driven component loses positive drive, resulting in rotor slippage or complete loss of trowel blade rotation — bringing concrete finishing to a halt at a stage where timing is critical.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

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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.