1. The function of the power component is to convert the mechanical energy of the prime mover into hydraulic pressure energy, referring to the oil pump in the hydraulic system, which provides power to the entire hydraulic system.

2. The control components (i.e., various hydraulic valves) control and regulate the pressure, flow, and direction of the liquid in the hydraulic system. Depending on the control function, hydraulic valves can be divided into pressure control valves, flow control valves, and direction control valves. Pressure control valves are further divided into relief valves, sequence valves, pressure relays, etc.; flow control valves include throttle valves, adjusting valves, and flow splitting/collecting valves; direction control valves include check valves, hydraulic check valves, shuttle valves, and reversing valves. According to the control method, hydraulic valves can be divided into switch-type control valves, fixed-value control valves, and proportional control valves.

Auxiliary components include oil tanks, oil filters, oil pipes and fittings, sealing rings, pressure gauges, and oil level and temperature gauges.

Hydraulic oil is the working medium that transmits energy in the hydraulic system, which includes various types of mineral oils, emulsions, and synthetic hydraulic oils. The role of the hydraulic system is to assist humans in performing work, mainly by converting pressure into rotational or reciprocating motion through the actuating components.

3. The installation of hydraulic pipelines is a major project in the installation of hydraulic system equipment. The quality of pipeline installation is one of the key factors affecting the normal working performance of the hydraulic system.

3. Hydraulic pipes with a diameter of less than 50mm can be cut using a grinding wheel cutting machine. Pipes with a diameter greater than 50mm should generally be cut using mechanical processing methods. If gas cutting is used, the area affected by the gas cutting must be machined to remove the altered structure, and a welding groove can also be machined. Except for return pipes, pressure pipes must not be cut using roller-type squeezing cutters. The cut surface of the pipe must be smooth, and burrs, oxide scale, and slag must be removed. The cut surface must be perpendicular to the pipe axis.

4. Pipes with an outer diameter of less than 30mm can be bent using the cold bending method. For pipes with an outer diameter between 30mm and 50mm, either cold bending or hot bending methods can be used. For pipes with an outer diameter greater than 50mm, hot bending is generally used.

5. When using butt welding for hydraulic pipelines, the inner wall of the weld must be 0.3 to 0.5mm higher than the pipe. It is not allowed to have any inward concavity on the inner wall. After welding, the protruding weld on the inner wall should be smoothed using a file or portable grinding wheel. Remove welding slag and burrs to achieve a smooth finish.

6. During the entire welding process, protection against wind, rain, and snow should be ensured. After welding, for welds with a wall thickness of 5mm or less, they should cool naturally at room temperature and should not be forced to cool with strong wind or water.

7. The welds should be fully penetrated and the surface should be uniform and smooth. The welds of pressure pipelines should be sampled for non-destructive testing.

8. After the pipes are piped, welded, and pre-installed, they should be disassembled again for acid pickling and phosphating treatment. After acid pickling and phosphating, hot air should be introduced into the pipes for rapid drying. After drying, if the system is reassembled within a few days and hydraulic oil is introduced into the pipes, generally no rust prevention treatment is needed, but they should be properly stored. If long-term storage is required and rust prevention coating is needed, it should be applied 48 hours after phosphating treatment. It should be noted that the rust prevention coating must be compatible with the cleaning solution used for future pipe cleaning or the hydraulic oil used.