Hydraulic Press
A machine that uses hydraulic pressure to press-fit or extract bearings, bushings, and gears.
A shop hydraulic press is a powerful machine that uses a hydraulic cylinder to generate immense force (typically rated in tons, such as 12-ton or 20-ton models) to press metal components together or separate them. In automotive repair, it is an essential tool for operations involving interference fits, where parts are held together by friction and tight tolerances rather than threads.
Hydraulic presses are commonly used to install or remove wheel bearings from steering knuckles, press suspension bushings in and out of control arms, install axle shafts into gears, and press wrist pins into pistons. Attempting these repairs with a hammer can distort or damage the delicate components.
Operating a hydraulic press requires extreme care and safety equipment, including eye protection. Because of the high force applied, components can shatter or slip under load, potentially ejecting metal fragments. Using the correct size press plates, drivers, and sleeves ensures the force is applied evenly to the component without damaging it.