Wacker Neuson 5000154288 Key 8 X 7 X 34 (Sq Ends)

The Wacker Neuson is a genuine OEM Key 8 X 7 X 34 (Sq Ends) designed for the CT30, CT36, and CT48 series walk-behind concrete power trowels. Sourced directly from Wacker Neuson, this key is manufactured to the exact dimensional and material specifications required for proper drivetrain engagement in these machines. It fits the full range of CT-series trowel variants, including gas and diesel powered models, CE-compliant units, and variable-speed configurations across the 30-inch, 36-inch, and 48-inch blade diameter families. Keeping a correct-specification key in service is essential to maintaining positive torque transfer and preventing progressive shaft or keyway damage.

Key Features

• Exact OEM Dimensions — Manufactured to the precise 8 x 7 x 34 mm profile with square ends, ensuring full keyway engagement without slop or play.
• Genuine Wacker Neuson Part — Sourced directly from Wacker Neuson, confirming correct material hardness and surface finish for this drivetrain application.
• Broad CT-Series Compatibility — Fits CT30, CT36, and CT48 walk-behind trowels across gas, diesel, and variable-speed variants, including CE-compliant models.
• Positive Torque Transfer — A correctly fitted key locks the shaft and hub together, delivering consistent rotor speed and preventing blade-speed drop during finishing passes.
• Protects Shaft and Hub — Using an undersized or worn key accelerates keyway wallowing on both the shaft and mating hub; replacing with the correct OEM piece stops further damage.

A woodruff or parallel key like the 5000154288 is a small but critical drivetrain component that sits in a machined slot between a rotating shaft and its mating hub or gear. It locks the two components together rotationally, so that torque from the engine or gearbox is transmitted without slippage. When a key shears, wears, or is missing entirely, the driven component — such as a trowel rotor hub — will spin freely on the shaft, resulting in complete loss of blade rotation and rapid damage to the keyway surfaces. Replacing the key promptly with the correct part restores full power transmission and prevents the more costly repair of replacing the shaft or hub assembly.

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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