LESSON 19 · INTERMEDIATE · SHORT LESSON
Reading Hydraulic Circuits
Starting at the tank, separate the circuit into supply, work, return and pilot paths.
What is happening technically?
A symbol shows function, not component appearance. Follow the valves' illustrated initial positions and port connections.
In practice
If the cylinder does not move, examine the oil path in the diagram before focusing on the command.
● Pressure / supply● Return┄ Pilot (illustrative)
Educational diagram only; not a manufacturing or safety circuit. The pilot line illustrates the line style only.
Symptom → check → solution
If movement, pressure or temperature changes, first identify the conditions in which the symptom occurs. Record existing gauge readings. Base maintenance or circuit examination on causes confirmed by measurements.
Select your symptom in Fault Hunter →Quick check
Which is the correct approach before replacing a component?