THE EMPLOYEE WAS MOVING THE TENSIONING SPRING OF THE CLINKER CRANE TROLLEY BRAKE. WHILE MOVING THE TENSIONING SPRING OF THE CLINKER CRANE TROLLEY BRAKE, EE FAILED TO UNLOAD SPRING TENSION PRIO R TO REMOVING CRANE BRAKE SHOE. EMPLOYEE MOVED THE TENSION BAR, THE SPRING RELEASED AND CAUGHT EE'S RIGHT FOURTH FINGER BETWEEN THE SPRING AND THE ADJUSTING NUT, CAUSING U SHAPED LACERATION.