Securing mechanism for shackle

A method to secure a shackle, which method comprises the steps of:

• inserting a shackle bolt having a head at one end and a circumferential groove near an opposed end through a pair of openings in opposed legs of said shackle;
• installing a two piece clamp assembly around said shackle bolt in said circumferential groove including separating a face ring and a back ring of said two piece clamp assembly by rotating about a hinge pin and moving to a closed position by closing said face ring and said back ring by said hinge pin;
• inserting a retainer pin through an opening in said two piece clamp assembly in order to secure said two piece clamp assembly in said closed position;
• and
• inserting a lock pin through an opening in said two piece clamp assembly and through a transverse recess in said retainer pin to retain said retainer pin.