98F55308750000 is a precision aviation maintenance tool, compliant with AS9100D quality standards and FAA/EASA maintenance regulations, designed for the hydraulic systems of large commercial aircraft.

It serves as a hydraulic quick-disconnect coupling removal tool, used to safely detach hydraulic quick-disconnect couplings during MRO maintenance or component replacement. It applies controlled force to avoid damaging the coupling's locking structure or sealing components, preventing hydraulic fluid leakage, which would impair the performance of hydraulic systems for flight control, landing gear, or brakes, and threaten flight safety.

Made from high-strength, corrosion-resistant aluminum alloy, it works stably at -45°C to 165°C, and resists wear. Weighing 0.36kg, it has an ergonomic grip for easy operation in narrow spaces, a critical tool for hydraulic system maintenance safety.