Multiquip 12874 Worm Gear Machined Case

The Multiquip 12874 is a genuine OEM Worm Gear Machined Case designed for a wide range of Multiquip and Whiteman walk-behind power trowels, including J36, JA, B46, BA, C, CA, JS, BS, and HDA series models. As a factory-original component, part 12874 is manufactured to the exact tolerances required by the gearbox assembly, ensuring a correct, consistent fit across the compatible trowel lineup. DHS Equipment stocks this part to help crews keep their finishing equipment running without extended delays. Verify your model code against the fitment list to confirm compatibility before ordering.

Key Features

• Precision-Machined Housing Geometry — Manufactured to exact OEM dimensional specs, ensuring proper gear mesh alignment and worm gear containment within the gearbox assembly.
• Genuine OEM Component — Sourced directly from Multiquip, this case matches the original part replaced in production — no guesswork on material grade or wall thickness.
• Broad Trowel Series Compatibility — Fits J36, JA, B46, BA, C, CA, JS, BS, HDA, PRO36, PRO46, and SCT series walk-behind trowels, making it a high-utility stocking part for multi-machine fleets.
• Gearbox Integrity Under Load — A correctly seated worm gear case maintains oil retention and load transfer efficiency, allowing the trowel blades to spin at consistent torque output during finishing passes.
• Direct OEM Cross-Reference — Part number this part matches Multiquip's own service documentation, so it integrates directly with existing gearbox hardware without sourcing additional adapters or fittings.

The worm gear case is the structural housing that encloses the worm gear set in a walk-behind power trowel's gearbox. It holds the gear components in precise alignment, retains lubrication oil, and transfers rotational force from the engine or clutch down to the trowel blade spider assembly. When the case cracks, warps, or develops seal failures at its mating surfaces, the gearbox loses oil rapidly, leading to accelerated gear wear and eventual loss of blade drive. Replacing a damaged case with a correct OEM unit like the Multiquip 12874 restores full gearbox containment and protects the internal gear set from further damage.

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.