EE AND ANOTHER WERE CHANGING OUT A BAD BRAKE CHAMBER ON A MODEL NO. 2085 DART TRUCK THE BRAKE LINE HAD BEEN REMOVED FROM THE BRAKE CHAMBER WHEN THE AIR PRESSURE ON THE BRAKING SYSTEM DROPPED BELOW 60 LBS OF PRESSURE. THIS CAUSED THE BRAKESTO SET UP AND BLOW THE FLUID OUT OF THE BRAKE LINE AND INTO EE'S EYES. MEDICATION WAS PRESCRIBED.