Meritor Air Brake Camshaft Hand

The Meritor air brake camshaft (also called an S-camshaft or S-cam) is a core part of the drum brake foundation on heavy-duty trucks and trailers. When the slack adjuster turns the camshaft, the S-shaped cam head spreads the brake shoes against the drum. This converts air chamber force into braking force. Meritor camshafts come in left-hand and right-hand versions so the cam rotates correctly on each side of the axle.

Key Features:

• Converts slack adjuster rotation into brake shoe movement for consistent brake application
• Splined shaft end engages the slack adjuster
• Handed (left and right) designs match the wheel-end side being serviced
• Hardened steel alloy construction for durability under demanding heavy-duty use
• Engineered for Meritor drum brake systems, in configurations for drive, steer and trailer axles
• Replaces worn cam surfaces, worn splines and shaft play that can reduce brake performance

Camshafts are specified by hand, head type, length, shaft diameter and spline count. Match these to the original part, or use the Meritor number on the old camshaft, when selecting the right variant. Many installers replace the cam bushings, seals and related brake hardware at the same time to restore even shoe wear and smooth cam operation.