them the replacement unit which has been given a complete overhaul is lowered into the machine room through the service hatch the seven-man team are all specialists who have been specifically trained for this engine series slowly they lower the 750 kilogram part in the crankcase tough manual work with the help of a pulley and the confines of the machine room there is no space for an automatic ceiling crane the con rod cover then makes its descent since it weighs only 25 kilograms it is no problem for the mechanics skillful hands easily slip the