EMPLOYEE WAS REMOVING A HYDRAULIC FILTER FROM A 992G LOADER WHEN THE FILTER WRENCH HE WAS USING BROKE CAUSING HIM TO FALL FORWARD AND STRIKE HIS FOREHEAD ON THE BOTTOM OF THE METAL COMPARTMENT DOOR OF THE LOADER. HE WAS TAKEN TO THE HOSPITAL WHERE HE RECEIVED FOUR STITCHES TO TREAT THE LACERATION.