THREE EMPLOYEES WERE CHANGING THE RETURN ROLLER.ONE LIFTING THE WEIGHT OF THE BELT, THE SECOND ALIGNING THE BRACKET, INJURED LIFTING ROLLER. THE ROLLER BECAME LODGED ON A GREASE FITTING AND HE REMOVED HIS HANDS TO DISCUSS A FURTHER PLAN OF ACTION WITH HIS COWORKERS. WHEN HE PUT HIS HANDSBACK UNDER THE ROLLER IT BECAME DISLODGED FROM THE GREASE FITTING PINNING HIS FINGER.