Air Brake Systems (heavy trailers)

Air brake components, adjustment and inspection.

Lessons

1. 01Trace the S-Cam Brake Force PathExplain how supplied air becomes shoe-to-drum braking force through the chamber, slack adjuster and S-cam.
2. 02Understand Chambers and Spring-Brake HazardsDistinguish service-chamber operation from spring-brake operation and recognize the stored-energy servicing restriction.
3. 03Identify Slack Adjusters and Preserve Component CompatibilityDifferentiate manual and automatic adjustment while explaining why matched brake components matter.
4. 04Lubricate Brake Components and Check Camshaft SupportLocate brake lubrication points and recognize when the supplied lubricant guidance needs clarification.
5. 05Plan Quick-Change Brake DisassemblyFollow the documented quick-change brake removal sequence while maintaining support and spring-brake safety.
6. 06Reassemble Quick-Change Brake ComponentsRecognize the seal, roller, retainer and spring details that govern quick-change brake reassembly.
7. 07Set Up the Documented Automatic Slack AdjusterApply the source's automatic-adjuster mounting sequence without treating it as universal across adjuster designs.
8. 08Adjust Manual Slack for Brake ConditionDistinguish initial adjustment of green brakes from adjustment of burnished brakes and complete the required applied-brake checks.
9. 09Verify Stroke, Contact, Geometry and ReleaseUse chamber-specific stroke limits together with lining contact and linkage checks to evaluate the adjusted brake.
10. 10Diagnose Air-Brake Symptoms SystematicallyConnect brake symptoms with documented mechanical and air-system causes while respecting the limits of the supplied troubleshooting guidance.