Raybestos WC37180 Drum Brake Wheel Cylinder Kit

Raybestos WC37180 Drum Brake Wheel Cylinder (Element3) is a 1-1/2-inch bore wheel cylinder designed for hydraulic drum-brake systems in the rear drums of older heavy‑duty trucks. As part of the Raybestos Element3 lineup, WC37180 is sold as a direct replacement wheel cylinder for 15‑inch by 6‑inch drum brake assemblies, delivering hydraulic actuation that pushes the brake shoes against the drum when the pedal is applied. The bore size and drum compatibility align with 15 × 6 in drum configurations, per Raybestos/Brake Parts Inc catalogs. Common applications surfaced in aftermarket listings include the rear axle on International 3800 models from about 1990–1994; the part is also shown in listings for Ford trucks such as the F800 in the early 1980s, reflecting its use across a range of older drum‑brake platforms. The WC37180 is cataloged as a Raybestos Element3 wheel cylinder and is offered by retailers as a replacement component for worn or leaking rear wheel cylinders in compatible drum‑brake systems.