Eaton AE99117E - Aeroquip 1800 Coupling Assembly -4

The Eaton AE99117E is an Aeroquip 1800 Series Coupling Assembly, Style II, AN size -4 (1/4"), for Skydrol and phosphate ester hydraulic fluid service. Both halves are hose-end type, enabling an in-line quick-disconnect within a flexible Skydrol hydraulic hose run without requiring a fixed panel-mounted fitting. EPR seals and PTFE backup rings on both halves provide complete phosphate ester chemical resistance. Rated to 3000 PSIG.

In-Line Skydrol Hose-to-Hose Assembly

• Both halves use EPR seals and PTFE backup rings for consistent Skydrol compatibility
• Factory-matched pair ensures both halves are specified for the same phosphate ester fluid
• Style II in-line assembly creates a Skydrol hose break point without bulkhead penetration
• Compact 1/4-inch bore delivers precise, low-volume flow control for servo actuator circuits in Skydrol-fluid aircraft

Certified to MIL-C-25427A and AS1709 for aircraft flight controls, landing gear systems, and brake hydraulic circuits. The low-profile ratchet lock mechanism — quarter-turn actuation locks the coupling under vibration and pressure cycling with minimal actuation force provides secure tool-free locking on both halves. Do not mix petroleum-grade coupling halves with Skydrol fluid — mixing will damage Nitrile seals. Confirm Skydrol fluid compatibility for both halves before installation.

Commercial and Military Skydrol Hose Assembly Applications

• In-line break points in commercial airline Skydrol hydraulic hose assemblies
• Military aircraft phosphate ester hydraulic circuit serviceable disconnect points
• Skydrol-service ground support equipment flexible hose routing
• MRO shop Skydrol hose assembly kitting for servo actuator circuits, instrument hydraulic lines, and brake accumulator systems