Parking Brake System: Testing and Inspection

INSPECTION

1. Measure the drum inside diameter.

Standard value : 190mm (7.48 in.)
Service limit : 191mm (7.52 in.)


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




2. Measure the brake lining thickness.

Standard value : 4mm (0.157 in.)
Service limit : 1.5mm (0.059 in.)






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

3. Inspect the brake lining and drum for proper contact.