In his article for Machinery Lubrication tilted "Cleaning and Flushing Basics for Hyrdaulic Systems and Similar Machines," Tom Odden outlines the procedure for thoroughly cleaning a hydraulic system.

A study suggests that the first of seven key pyramids in Egypt, the Step Pyramid of Djoser, was built using a hydraulic lift. Dated to about 4,500 years ago, this would move up the introduction of ...