Automann 139.2833 Automatic Slack Adjuster – 1-1/2" 28 Spline, 5.5" Arm, Meritor Type Temperature Switch Verify your engine serial number

Verify your engine serial number and confirm dual-connector layout before ordering — Cummins uses several speed-sensor variants across the B/ISB/QSB family with different connector configurations

Verify your existing Betts lamp body series (40/45/47) before ordering

Valmet 800027847

Visible water when draining the collection bowl

This tubing is equivalent to the following 3/8" black 50' air brake tubing part numbers from major aftermarket brands

Automann 139.2833 Automatic Slack Adjuster – 1-1/2" 28 Spline, 5.5" Arm, Meritor Type Temperature Switch Verify your engine serial numberAutomann 139. 2833 is a stroke sensing Meritor Type B automatic slack adjuster with a 5 1 2" arm and 1 1 2" 28 spline input a direct replacement for Meritor R802447 R803049. The yellow piston design holds shoe to drum clearance automatically across service intervals, and the unit ships complete with the 179. YK5005 clevis kit (5 8" 18 thread). Use on Class 68 tractors, vocational trucks, and air braked trailers with Meritor drum brake foundations.