Automatic Slack Adjuster

The   process of adjusting the shoe clearance manually is cumbersome and  time  consuming, as we will be seeing now. The brake adjustments need  several  steps. Jack up the wheels and keep rotating the wheel. Then  press the  worm shaft clock completely and rotate worm shaft until the  wheel locks.  After this, rotate the worm shaft in the reverse direction  until the  wheel starts rotating freely. Then turn the worm shaft  slightly and  release the lock. Repeat this process for all the wheels.  As it is  difficult to maintain uniform clearance on all wheels and this  can  result in vehicle pulling to one side while braking.