S-31110-11L or S3111011L is a genuine Hendrickson S-cam brake camshaft, catalogued as an Hxs, 12.25, 28 spline camshaft. The S-cam head turns inside the drum brake and pushes the rollers on the brake shoes outward so the linings press against the drum, converting the straight-line push from the air chamber into rotation.
The shaft rides in supporting bushings at the wheel end, so camshaft and bushing condition go together. Uneven or tapered lining wear, or a pop or clunk from the wheel when the brakes first apply, points to play in the shaft. With excess play the cam head can wobble and load the shoe at an angle. A genuine Hendrickson part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Hendrickson S-cam brake camshaft
Catalog designation: S-Cam, Hxs, 12.25, 28 spline
Turns the cam head against the shoe rollers to apply the drum brakes
Shaft runs in supporting bushings, so check both when inspecting for play
Uneven lining wear or a pop or clunk at brake application points to a worn shaft or bushing
