THE MAIN HOIST WHICH IS FOR THE TRANSPORTATION OF MINERS AND ALSO EQUIPMENT WAS TRIPPING OUT ON THE OVERLOADS. IT WAS RESET SEVERAL TIMES DURING THE SHIFT. THE HOIST WAS SHUT DOWN AT 4:00 P.M. TO CHANGE THE COMPLETE ELECTRIC BOX. THE JOB WAS COMPLETED AT 7:00 P.M. AT THAT TIME THE HOIST WAS MONITORED TO INSURE PROPER OPERATION, AFTER WHICH IT WAS RETURNED TO NORMAL OPERATION.