How do I check hydraulic oil level in Komatsu excavator?

To check the hydraulic oil level in a Komatsu excavator, first ensure the machine is on a level surface and the engine is turned off. Locate the hydraulic oil reservoir and remove the dipstick or filler cap; clean it with a cloth and reinsert it without screwing it back in to check the level. The oil should be between the "Full" and "Low" marks on the dipstick. If the level is low, add the recommended hydraulic oil until it reaches the correct level.