What could indicate a need for a leak-down test in a hydraulic system?

A rapid pressure drop in a sealed system is a strong indicator that there may be a leak present. In hydraulic systems, maintaining consistent pressure is crucial for proper operation, and any sudden decrease in pressure suggests that fluid is escaping somewhere, whether it be through a leak in hoses, fittings, or seals. Performing a leak-down test allows technicians to isolate and identify the source of the leak by monitoring how quickly the pressure drops and pinpointing where the fluid loss is occurring.

In contrast, consistent pressure readings and normal functionality usually suggest that the system is operating correctly and does not require further testing. Increased noise during operation might indicate other issues, such as cavitation or mechanical malfunctions, but it is not as direct an indicator of a pressure integrity problem as a rapid pressure drop. Therefore, when a hydraulic system indicates a sudden loss of pressure, it necessitates a thorough investigation through a leak-down test.