Automann 139.2837 Automatic Slack Adjuster 1-1/2-28 Spline 6 Inch Arm

The Automann 139.2837 is an automatic slack adjuster designed for heavy-duty truck air brake systems. This critical safety component automatically maintains proper brake clearance between the brake shoes and brake drum, ensuring consistent braking performance and reducing manual maintenance requirements.

Key Features:

• 1-1/2 inch spline diameter with 28 spline count
• 6 inch straight arm length
• Automatic stroke sensing adjustment type
• Collar lock clevis with 5/8 inch thread diameter and 18 thread pitch
• Constructed from durable ductile nodular iron
• Factory lubricated and sealed drilled worm wheel
• Universal/unhanded design for left or right side application
• No external bracket required for installation

This slack adjuster connects the brake chamber push rod to the S-cam shaft, converting linear motion into rotational force for effective and controlled braking. It replaces OEM part numbers including Meritor R802487, R803055, A14-3275-C-1147, Dayton 05-3621, and Euclid E-11422.