A hydraulic system transmits force from one point to another using an incompressible fluid. The fluid is almost always oil and the force is almost always multiplied in the process. Nowadays, it is very easy to add force multiplication (or division) to the system.

Hydraulic systems are extensively used in machine tools, material devices, transport and other mobile equipment. Written for design engineers and maintenance personnel Oil Hydraulic Systems: Principles and Maintenanceprovides the necessary tools for installation, operation and maintenance of hydraulic equipment. The book touches on such subjects as: hydraulic system maintenance, repair and reconditioning, seals and packing, hydraulic pipes, hoses and fitting, design of hydraulic circuits.