The 139.2830 Meritor-style automatic slack adjuster is a durable, 7‑lb unit featuring a 1½‑inch × 28 spline shaft and a 6″ arm length. Designed with a built-in auto-adjust mechanism, it offers versatile fitment across a wide range of Meritor-type brake systems and comes equipped with a 5/8″‑18 clevis for easy installation.
