What does the release of hydraulic fluid when the air valve core of an accumulator is depressed typically indicate?

The release of hydraulic fluid when the air valve core of an accumulator is depressed typically indicates a ruptured diaphragm or leaking seals. This situation occurs because the accumulator is designed to separate the hydraulic fluid and the air (or gas) within it. When the diaphragm is intact and functioning properly, pressing the air valve should not result in fluid being expelled; instead, it should only release air or gas.

If hydraulic fluid is observed during this process, it suggests that the diaphragm has been compromised, allowing the fluid to mix with the gas side of the accumulator. This condition can lead to improper accumulator function and may also pose safety risks. Additionally, it may signal that seals are also leaking if fluid is present in areas not intended for hydraulic fluid. Addressing this issue is crucial for maintaining the integrity and performance of the hydraulic system.