Mechanical system provided with a sump receiving, above components to be lubricated or cooled, a tank of a lubricating fluid system

A mechanical system comprising a sump and at least one component to be lubricated or cooled arranged in the sump, the mechanical system comprising a lubricating fluid system provided with a lubricating fluid and a tank arranged in the sump, the tank being a leaking tank and being situated above the at least one component to be lubricated or cooled, the lubricating fluid flowing out of the tank by force of gravity so as to reach the at least one component to be lubricated or cooled, the lubricating fluid system comprising at least one lift flow generator connected by at least one filling line to the tank and to at least one suction point present in a bottom of the sump, the lift flow generator being configured to fill the tank with the lubricating fluid present in the bottom at least during a starting phase (P1),

• wherein the lubricating fluid system comprises at least one fluid circuit provided with a distribution pump connected to the tank by a hydraulic inlet connection, the fluid circuit having a hydraulic outlet network comprising at least one distribution circuit configured to eject the lubricating fluid to the at least one component to be lubricated or cooled, the distribution pump being connected to the hydraulic outlet network and configured to draw the lubricating fluid from the tank and make this lubricating fluid flow from the hydraulic inlet connection to the hydraulic outlet network.