Five main categories of equipment to achieve this power transmission in a hydraulic system are:
- The hydraulic pump to convert mechanical into hydraulic energy.
- Valves to allow this hydraulic energy to be controlled.
- Hydraulic cylinders to convert the hydraulic energy into linear force and motion or
- Hydraulic motors to convert the hydraulic energy into continuous rotary motion
- Ancillary equipment including filters, heat exchangers, tanks, pipes, etc. to complete practical circuits.