Wacker Neuson 5003012513 Key Square 1/4 X 2-3/16

The Wacker Neuson Key Square 1/4 X 2-3/16 is a genuine OEM component designed for CRT48, CRT36, CT48, and CT36 series ride-on and walk-behind trowels. Sourced directly from Wacker Neuson, this square key meets the exact dimensional and material standards of the original part it replaces. It fits an extensive range of trowel configurations across both the 915mm/36in and 1220mm/48in machine families, including ride-on models with standard, high-speed, electronic steering, and power steer variants, as well as walk-behind AGP, AGT, ADP, and ADT configurations. When replacing a worn or damaged drive key, using the correct OEM part ensures proper torque transfer and protects surrounding shaft and hub components from accelerated wear.

Key Features

• Exact OEM Dimensions: — Manufactured to the precise 1/4 X 2-3/16 inch specification, ensuring correct seating in the keyway without slop or binding.
• Direct Drop-In Replacement: — Slides into the existing keyway slot on the shaft without machining or re-fitting, restoring the original drive engagement.
• Broad Trowel Compatibility: — Fits CRT48, CRT36, CT48, and CT36 series trowels across ride-on and walk-behind configurations, covering both 36in and 48in deck sizes.
• Protects Drivetrain Components: — A correctly sized square key maintains positive rotational drive between shaft and hub; an undersized or worn key causes fretting, vibration, and eventual shaft damage.
• Genuine Wacker Neuson OEM Part: — Supplied under part number 5003012513, this is an authorized Wacker Neuson component, not a generic substitute.

A square key is a small but critical drivetrain component that locks a rotating shaft to a hub, sprocket, or pulley, preventing relative rotation between the two parts. It sits in matching keyway slots cut into both the shaft and the mating component, transmitting torque through a positive mechanical connection rather than relying on friction alone. When a square key shears, deforms, or wears loose in its keyway, drive is lost or becomes intermittent — on a concrete trowel this can result in erratic rotor speed, uneven finishing, and additional stress on the gearbox and engine output shaft.

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.

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.