Multiquip 1140 Composite Worm Gear

The Multiquip 1140 is a genuine OEM Composite Worm Gear designed for Whiteman and International walk-behind power trowel series, including BH11C, BH90C, BS90C, J36, B46, CA4HC, PRO36, PRO46, JS36, JS60C, and related models. As a direct OEM replacement, part 1140 is manufactured to the same specifications as the original component installed at the factory, ensuring a consistent, accurate fit within the gearbox assembly. DHS Equipment supplies this part to keep your trowel performing at full capacity with no guesswork on compatibility. Verify your model code against the fitment list to confirm this is the correct gear for your machine before ordering.

Key Features

• Composite Material Construction — The composite worm gear material is engineered to handle torsional load transfer within the trowel gearbox while resisting wear and heat buildup during extended operation.
• Genuine OEM Part — Sourced directly from Multiquip, part number this part meets the original design tolerances for tooth profile and drive engagement, so the gear meshes correctly with the worm shaft without adjustment.
• Broad Walk-Behind Trowel Compatibility — Fits an extensive range of Whiteman and International walk-behind power trowel models, including BH11C, BH90C, BS90C, J36, JH55C, JH90C, B46, BS46, CA4HC, PRO36, PRO46, JS36, JS60C, M30H55, and related series.
• Critical Drive Component — The worm gear is the primary torque transfer element between the motor and the trowel blade assembly; a worn or damaged gear causes blade slip, uneven finishing speed, or complete loss of blade rotation.
• Drop-In Replacement — Dimensioned to the original gearbox housing spec, part this part installs in place of the factory gear using standard service procedures with no machining or adaptation.

The worm gear in a walk-behind power trowel is responsible for transferring rotational power from the drive shaft to the trowel blade spider assembly. It works in mesh with the worm shaft to step down speed and multiply torque, allowing the blades to apply consistent pressure across the concrete surface during finishing. When this gear wears down or cracks — common after extended use or if the gearbox runs low on lubricant — blade rotation becomes erratic or stops entirely, leaving the concrete surface unfinished and the machine inoperable until the gear is replaced.

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.