The hydraulic lift, often found in garages, can effortlessly elevate the huge load of a motor vehicle for examination. It consists of one piston so most of the work is done by hydraulics. Air is forced via a compressor to a reservoir of oil, which boosts its pressure. This oil reservoir also functions as the master cylinder. The oil at high pressure flows to the bottom of the cylinder, which forces up the piston and at the same time the automobile. If the piston is required to stay extended, the oil valve is closed. When the automobile needs to be lowered, the same valve can be opened to expel the compressed air, reduce the oil pressure, and enable the automobile to descend.
