HU87105-3 is a professional aviation maintenance tool compliant with AS9100D standards and FAA/EASA regulations, tailored for aircraft hydraulic system servicing in ground support operations. It acts as a precision hydraulic connector disassembly tool, specialized in safely removing and installing high-pressure hydraulic fittings of landing gear and flight control systems during MRO. Crafted from high-strength corrosion-resistant alloy steel, it resists aviation hydraulic fluid erosion and wear, operating stably in -40℃ to 100℃ harsh airfield conditions. Its ergonomic design ensures labor-saving operation and prevents damage to fitting threads, avoiding secondary maintenance issues. Compact and portable, it fits narrow operation spaces perfectly, streamlines hydraulic system maintenance, ensures fitting connection integrity, and serves as an essential GSE tool for safe and efficient aircraft hydraulic servicing.