6971-MT221238
Auto Right-Hand Slack Adjuster
Mack

The Auto Slack Adjuster RH is a self-adjusting brake component designed for the right-hand side of heavy-duty drum brakes. It maintains correct brake shoe clearance automatically, reducing manual adjustment needs and ensuring consistent drum wear. This results in steadier braking response and reduced risk of brake drag or inconsistent stop power over time. The auto-adjusting mechanism is sealed to resist moisture and contamination, preserving performance in challenging environments such as rain, snow, and dirt roads. Installation aligns with standard mounting bolts and linkages to minimize downtime during replacement and maintenance. By keeping shoe clearance within optimal range, the part supports longer drum life and lower maintenance costs for fleets with frequent stop-and-go operation or steep grade requirements. Source One Parts Center.