9 inch Mechanical Brake Adjuster is used when your brake shoes have worn a little. The adjuster notches your brakes shoes closer to the drum.
Should your braking not improve after using the adjuster, you need to replace your brake shoes.
Question: The drum is rubbing on the brake shoes when I spin the drum.
Answer: Your brake shoes are not concentrically aligned. A quick way to align your brakes when the drum is installed is to hit your park brake arm with a solid object. This produces a force to your brake shoes that align in most cases to the proper position. This procedure only works on NEW brake shoes.
Suits all 9″ backing plates