EE AND COWORKER WERE REMOVING A BROKEN SHEAR PIN FROM CC-4 CRUSHER USING A PORTA POWER PUSHING THE PIN AND A RATCHET AND SOCKET WITH A WELDED STUD PULLING THE FROZEN PIN. THE PIN BROKE FREE FOR ABOUT AN INCH AND EE SLIPPED STRIKING HIS HEAD INTO THE WEBBING OF THE CRUSHER CAUSING A CUT ON HIS FOREHEAD.