What is the primary reason for cleaning the top of the reservoir before inspecting the hydraulic fluid level?

Cleaning the top of the reservoir before inspecting the hydraulic fluid level is primarily done to prevent foreign material from entering the hydraulic system. This is crucial because any debris, dirt, or contaminants present on the reservoir's surface can easily fall into the fluid when the reservoir is opened for inspection, potentially leading to contamination of the hydraulic fluid. Contaminated hydraulic fluid can cause wear and tear on components, reduce system efficiency, and lead to operational failures.

By ensuring that the top of the reservoir is clean, you mitigate the risk of introducing harmful particles into the system. This practice is essential for maintaining the integrity of the hydraulic fluid and ensuring the longevity and reliability of the hydraulic system. Maintaining clean conditions helps promote the overall performance and safety of the equipment.