How should you check the slack adjuster?

To check the slack adjuster properly, the most effective approach involves parking the vehicle on level ground and then using a hands-on method to pull on each slack adjuster. This technique allows for the assessment of the slack adjuster's response and functionality. By pulling on the adjuster, you can determine if it moves freely and adjusts as needed.

This method is particularly advantageous because it provides immediate feedback on the condition of the adjuster and ensures the adjustment mechanism is operational without any obstructions or malfunctions that could affect performance.

While measuring the distance moved when brakes are applied is a valid method for assessing brake performance in general, it does not specifically evaluate the slack adjuster's condition. Similarly, a visual inspection for wear and tear is essential, but it may not reveal internal issues such as freezing or binding that could affect the adjuster's performance. Testing while the vehicle is in motion is not safe for this specific check and does not allow for a definitive assessment of the slack adjuster's ability to adjust correctly.

Thus, performing the check on level ground and applying manual pressure to each slack adjuster is the best practice to ensure proper operation and adjustment capabilities.