TWO EMPLOYEES WERE DISLODGING A JACK PAD FROM THE MUD ON A DRILL PATTERN. THE IR DRILL HAD LOST ITS PAD EARLIER THAT MORNING. THE SUPERVISOR HAD ADVISED THEM TO USE AN EXCAVATOR TO DO THE JOB IF NECESSARY. THEY USED A PRY BAR AND TOGETHER CARRIED THE PAD TO THE DRILL. LATER THAT SHIFT, ONE EMPLOYEE COMPLAINED OF NECK AND UPPER BACK PAIN.