1. If the inside surface of the brake drum has scratches, perform inspection. And, if it is unevenly worn, has narrow streaks on the surface, or the outside surface of brake drum is damaged, correct or replace it.
2. Measure the drum inner diameter. If it exceeds service limits, replace with a new drum.
Drum inner diameter L:
Standard value 254 mm (10 in)
Limit: 256 mm (10.08 in)
