Remove the brake drum. Refer to 
Brake Drum Replacement 
. Inspect the brake linings, the brake drums,
and the cam. Refer to 
Brake Drum Inspection 
.
- Inspect the air brake anchor pins (14) for corrosion and wear. Replace
the air brake anchor pins (14) if necessary.
 
- Inspect the brake shoe rollers (7) for corrosion and wear. Replace
the brake shoe rollers (7) if necessary.
 
- Inspect the camshaft (12) for cracks, wear and corrosion. Replace
the camshaft (12), if necessary.
 
- Inspect the brake chamber/camshaft support bracket (8) for broken welds,
cracks, and alignment. Replace any damaged brackets.