How to check excavator oil and hydraulic oil?

Check that the engine oil should be cold. There is a fuel gauge on the engine. When it is pulled out, there is a score line at the end, and the oil level in the score line is normal. There is a glass tube on the hydraulic oil tank. Look for it. When checking the hydraulic oil, stretch your arms and lie on the ground. It is normal to see the hydraulic oil level in the glass tube.