Inspection and Adjuster of the Suspension and Slack

4700 d 23.01.001

Walk around the vehicle and visually inspect suspension and slack adjuster components.

  1. Inspect the following suspension components for signs of structural damage, cracks, or wear.

    • springs

    • spring hangers

    • shocks

    • suspension arms

    • suspension brackets

    • axle seats

    • bushings

  2. Inspect slack adjusters for signs of damage. See Fig.. See Fig. or see Fig..

    1. Grease Fitting (if equipped)

    2. Slack Adjuster Housing

    3. Brake Chamber Pushrod

    4. Clevis

    5. Clevis Pin (large)

    6. Clevis Pin (small)

    7. Actuator Rod

    8. Boot

    9. Manual Adjusting Nut

    10. Camshaft Splines

    Fig. 1, Meritor Automatic Slack Adjuster

    1. 7/16-inch Adjusting Nut

    2. Grease Fitting

    3. Boot

    4. Link

    5. Brake Chamber Piston Rod

    6. Clevis

    7. 1/2-inch Clevis Pin

    8. 1/4-inch Clevis Pin

    9. Grease Relief Opening

    10. Slack Adjuster Spline

    Fig. 2, Gunite Automatic Slack Adjuster

    • Rotate the control arm toward the brake chamber until you can feel it contacting the internal stop.

    1. Clevis

    2. Slack Adjuster

    3. Clevis Pin

    4. Manual Adjusting Nut

    5. Control Arm

    6. Control-Arm Washers and Nut

    7. Anchor Strap Slot

    8. Anchor Strap

    9. Brake Chamber

    Fig. 3, Haldex Automatic Slack Adjuster

    • Inspect slack adjuster boots, if equipped, for cuts or tears.

    • Inspect anchor straps, if equipped, for damage.

    • Look for worn clevis pins on brake chamber pushrods.

    • Look for missing or damaged cotter pins on the clevis pins.

    • Ensure chamber piston rods are in line with the slack adjusters.

Note:
Parent topic: Daily Pretrip Inspection and Maintenance
Document Number: 0000118804
Manual Publication Date: 2024-05-13
Topic Publication Date: 2024-05-16