16.

Body Breakage Or Cracks From Gullets
The origin of the fracture is indicated by a flat area on the fracture surface.
Probable Cause :
  1. Excessive back-up guide "preload".
  2. Improper band tension.
  3. Guide arms spread to maximum capacity.
  4. Improper beam bar alignment.
  5. Side guide adjustment is too tight.
  6. Excessively worn teeth.