content_image/573873.jpg
<img src='content_image/573873.jpg'>

auto adjustment retraction mechanisms can be seen. Details of the mechanisms are also shown. 

Instead of using a pin grip assembly for auto adjustment, an adjuster pin, ball, and tube operate in the same manner. 

They move out when brake pressure is applied, but the ball in the tube limits the amount of the return to that equal to the brake lining wear. Two independent wear indicators are used on the brake illustra ted. An indicator pin attached to the backplate protrudes through the carrier. The amount that it 

