Wacker Neuson 5000153707 Gearbox Assembly Kit Left Hand CRT

The Wacker Neuson is a genuine OEM Gearbox Assembly Kit Left Hand CRT designed for CRT48 and CRT36 series ride-on concrete power trowels. As a factory-sourced assembly, this kit is engineered to the exact tolerances and specifications of the original gearbox, ensuring proper blade arm geometry and consistent rotor engagement. This part is confirmed to fit the CRT48-25K-L, CRT48-25K-H, CRT36-23K-H, CRT36-24A-H, CRT36-24A-E, and CRT36-25K-H models, covering both low-speed and high-speed ride-on trowel configurations. Keeping the correct left-hand gearbox assembly in place is critical to balanced, even finishing across the full trowel deck.

Key Features

• OEM Gear Mesh Integrity — Manufactured to the exact gear ratio and housing tolerances of the original, ensuring smooth torque transfer from the rotor to the blade arms without backlash or binding.
• Left-Hand Specific Assembly — This kit is configured specifically for the left-hand rotor position; installing the correct side-specific gearbox prevents misalignment and uneven blade pitch across the trowel deck.
• Broad CRT Series Compatibility — Fits CRT48 (25K-L and 25K-H) and CRT36 (23K-H, 24A-H, 24A-E, and 25K-H) ride-on concrete trowels, spanning 36-inch and 48-inch deck sizes in both low- and high-speed variants.
• Complete Kit Format — Supplied as a ready-to-install assembly, reducing the need to source individual internal components separately and simplifying the rebuild process in the field or shop.
• Preserves Finishing Performance — A worn or damaged gearbox causes irregular blade speed, uneven surface finish, and accelerated blade arm wear; replacing with a correctly spec'd OEM unit restores consistent rotor output and finish quality.

The gearbox assembly on a ride-on concrete trowel transfers rotational power from the drive system to the individual rotor, controlling blade arm speed and pitch across the trowel deck. On a dual-rotor machine like the CRT series, the left-hand gearbox works in opposition to the right-hand unit to generate the counter-rotating action that drives the machine and produces a level, burnished concrete surface. When a gearbox wears or fails — through gear tooth damage, bearing failure, or seal breakdown — rotor speed drops on one side, causing uneven finishing, machine drift, and potential damage to the blade arms and surrounding drivetrain components.

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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