Tronair KHC-3651 Reservoir Coupling Kit for Select Embraer Aircraft

The KHC-3651 adapts a service hose to the hydraulic reservoir bulkhead coupling on compatible Embraer aircraft, creating a secure interface between fluid servicing equipment and the aircraft's hydraulic reservoir. This connection enables technicians to perform reservoir fills, fluid transfers, and air-bleeding procedures cleanly and efficiently without introducing contaminants into the hydraulic system. The kit's secure coupling design minimizes fluid loss and leakage during servicing, helping maintain hydraulic system integrity throughout the maintenance process.

The KHC-3651 is compatible with the Embraer ERJ-135, ERJ-140, and ERJ-145 regional jets, as well as the Legacy 450, Legacy 500, Legacy 600, Legacy 650, and Praetor 600 business jets. This broad compatibility across both Embraer's regional and business aviation product families makes the KHC-3651 a versatile addition to any maintenance operation servicing Embraer fleets. Operators managing mixed Embraer fleets can use a single coupling kit across multiple aircraft types, simplifying tooling inventory and reducing the need for multiple platform-specific servicing adapters.

The KHC-3651 is intended for use with phosphate ester-based hydraulic fluids, such as Skydrol – the type of hydraulic fluid used in the compatible Embraer aircraft's hydraulic systems. Phosphate ester fluids are the standard choice in commercial and business aviation for their fire-resistant properties, and the KHC-3651's fittings and materials are selected to be compatible with these fluids. Using the correct coupling kit for the fluid type is essential to preventing seal degradation, contamination, and system damage during servicing.

The KHC-3651 includes all components needed to establish a complete reservoir coupling connection: a tube, a stainless steel ferrule, a Ferulok nut in #4 JIC configuration, a #4 JIC plug, a #4 sleeve, a #4 nut, and a #4 to #6 union. The inclusion of JIC fittings and the size-adapting union provides the hardware necessary to interface between the aircraft's reservoir bulkhead coupling and the servicing equipment's hose connection. Having all components supplied as a complete kit ensures proper fitment and eliminates the need to source individual fittings separately.

Tronair recommends using the KHC-3651 with its Skydrol fluid service units – specifically the 06-5022-6600 (2-gallon unit) and the 06-5042-3600 (8-gallon unit). The appropriate unit size will depend on the volume of fluid required for the servicing task and the operational environment. Using the KHC-3651 in conjunction with the correct Tronair fluid service unit ensures a compatible, leak-free connection from the servicing cart through to the aircraft's hydraulic reservoir.

A hydraulic reservoir coupling kit, such as the KHC-3651, provides a quick-connect interface between a fluid servicing hose and the aircraft's hydraulic reservoir bulkhead fitting, creating a sealed pathway for fluid transfer. The kit's fittings and hardware are designed to mate precisely with the specific bulkhead coupling geometry of the compatible aircraft, ensuring a secure, leak-resistant connection during servicing. Once connected, technicians can fill the reservoir, transfer fluid, or bleed air from the hydraulic system without exposing the system to atmospheric contaminants or incurring fluid loss.

Using a coupling kit specifically designed for the aircraft being serviced ensures proper fitment at the bulkhead connection, which is critical to preventing leaks, contamination, and incomplete fluid transfer. A poorly fitting or incompatible coupling can introduce air or contaminants into the hydraulic system, potentially compromising the function of flight control, landing gear, and braking systems that depend on clean, properly pressurized hydraulic fluid. The KHC-3651 is engineered for the specific bulkhead coupling configurations of its compatible Embraer aircraft, eliminating the guesswork and risk associated with using non-specified adapters.

No. The KHC-3651 cannot be modified without the written approval of Tronair. Any modifications made without Tronair's written consent void all warranties and releases associated with the product. Operators requiring a coupling solution for aircraft or fluid systems not listed in the KHC-3651's compatibility specifications should contact Tronair or an authorized distributor to identify the correct kit for their application.

Tronair warrants the KHC-3651 to be free of manufacturing and material defects for one year from the date of shipment to the original customer, with coverage limited to the repair or replacement of defective components. The warranty does not cover parts required for normal maintenance, components covered by a separate manufacturer's warranty, or damage resulting from unauthorized modifications. Replacement parts carry a 90-day warranty from their date of shipment.