Important: For unit repair information on the Rockwell air brake automatic slack adjuster contact the Rockwell Field Support Center at 1-800-535-5560.
8.1. | Disengage the pawl with a screwdriver. |
8.2. | Turn the slack adjuster adjusting nut until the air brake automatic slack adjuster is free from the air brake chamber clevis. |
8.3. | Release the pawl so that the pawl snaps into engagement. |
12.1. | Use a pound inch torque wrench in order to rotate the air brake automatic slack adjuster adjusting nut counterclockwise. |
12.2. | Turn the air brake automatic slack adjuster gear 360 degrees (22 rotations of the air brake automatic slack adjuster adjusting nut). The torque must remain less than 4.51 N·m (40 lb in). Overhaul or replace the air brake automatic slack adjuster if the torque specification is exceeded. |
Replace the air brake chamber clevis pins if necessary.
Replace the bushings if the diameter exceeds 13.5 mm (0.531 in).
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Important: The Eaton® air brake automatic slack adjuster is not serviceable. Replace any damaged Eaton air brake automatic slack adjusters.
Replace the slack adjuster (4) if damage or excessive wear is present.
It may be necessary to remove the air brake chamber clevis pin later in order to check installation.
Notice: Excessive positioning force may damage the air brake automatic slack adjuster control arm. Most adjusters will be equipped with an installation indicator. The indicator must fall within the slot for proper installation. Incorrect air brake automatic slack adjuster control arm position can cause tight or dragging brakes.
Use a plastic mallet in order to tap the slack adjuster control arm into position if necessary.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Important: Ensure that the slack adjuster control arm does not move from the correct position while tightening the slack adjuster control arm nut.
Tighten
Tighten the slack adjuster control arm nut to 17 N·m (13 lb ft).
A racheting sound occurs when the clutch slips. Replace the slack adjuster if the clutch slips at a lesser torque.