Drum Brake System: Testing and Inspection

INSPECTION





1. Measure the brake drum inside diameter. Check the runout of the brake drum using a dial indicator.





CAUTION: If the brake drum inside diameter is greater than the service limit, replace the brake drum.





2. Measure the brake shoe lining thickness.

CAUTION: If the brake lining thickness is less than the service limit, replace the brake shoe.





3. Inspect the brake lining and drum for proper contact.
4. Inspect the outside of the wheel cylinder for excessive corrosion and damage.