SKIP DUMP ORE BIN WAS PLUGGED & A SKIP OF ROCK WAS LOADED. THE SKIP COULD HAVE BEEN DUMPED AT ANY TIME BUT WE DID NOT WANT TO ADD TO THE PLUGGEDBIN. THE EMERGENCY HOIST WAS USED TO LOWER & RAI SE EMPLOYEES INTO AND OUT OF THE MINE. WHILE THEHOIST WAS BRINGING PEOPLE OUT A SEAL LEAKED & THE LOW ENGINE OIL SWITCH SHUT THE MOTOR OFF. WE ADDED OIL TO GET THE HOIST TO THE SURFACE.