How does proper seating of hydraulic seals affect ALRE performance?

• A. Ensures leak-free seals, proper pressure retention, and smooth operation.
• B. Changes hose color.
• C. Increases noise.
• D. Reduces oil viscosity.

Answer: (A)

Proper seating of hydraulic seals ensures the sealing surfaces press evenly and fully against the housing and bore, creating a reliable barrier that keeps hydraulic fluid contained under system pressure. In ALRE systems, the hydraulic actuators endure high pressures and rapid, dynamic loads during aircraft launch and recovery. If seals aren’t seated correctly, tiny gaps or uneven contact become leakage pathways, leading to pressure losses, reduced actuator force, and erratic or sluggish movement. When seals are seated properly, you get leak-free operation, solid pressure retention, and smooth, predictable actuation—everything ALRE relies on for safe and reliable performance.

Other factors like hose color have no impact on sealing integrity, and while improper seating can sometimes produce more noise or wear, those are not the direct outcomes of correct seating and are more associated with other issues such as misalignment or component wear. Similarly, oil viscosity is a property of the lubricant and temperature, not influenced by how seals are seated.