Four Seasons 66864 A/C Suction and Liquid Line Hose Assembly

Overview of Four Seasons Hose Assembly 66864

The Four Seasons Hose Assembly 66864 is designed for reliable HVAC performance in select Ford, Lincoln, and Mercury vehicles. This A/C suction and liquid line hose assembly supports R134-a refrigerant systems, ensuring proper air conditioning function for models like the Ford Fusion, Lincoln MKZ, and Mercury Milan.

• Constructed from durable aluminum and rubber materials
• Equipped with P-nut fittings on both ends for secure connections
• Includes gasket, fittings, and O-rings for a complete installation
• Supports both high and low system pressures
• Features a service port with switch port and manifold integration
• Compatible with R134-a refrigerant type
• OE replacement part designed without an orifice tube

Four Seasons Hose Assembly Product Line Details

The Four Seasons Hose Assembly product line focuses on delivering comprehensive hose solutions for automotive HVAC systems. This line includes assemblies that combine suction and liquid lines with integrated fittings, gaskets, and service ports to streamline installation and maintenance. The 66864 hose assembly exemplifies this approach by providing a ready-to-install unit that meets OEM specifications for Ford Fusion, Lincoln MKZ, and Mercury Milan models.

Technical Description and Features

This hose assembly is constructed with a combination of aluminum and rubber to balance durability and flexibility. Both ends feature P-nut fittings, ensuring a secure and leak-resistant connection to the vehicle’s A/C system. The assembly supports R134-a refrigerant and is designed to handle both high and low system pressures, making it suitable for the suction and liquid lines in the HVAC system. Included components such as slimline washer O-rings (part numbers 24404 and 24401), gaskets, fittings, and a muffler contribute to a complete and reliable replacement. The assembly also includes a service port with a switch port sized M10x1.25, facilitating system diagnostics and servicing.

Compatible Vehicles and Applications

• Ford Fusion models requiring A/C suction and liquid line hose assembly
• Lincoln MKZ vehicles with R134-a refrigerant systems
• Mercury Milan HVAC systems needing OE replacement hose assemblies

Common Issues Addressed by This Hose Assembly

• Leaks in suction or liquid A/C lines causing refrigerant loss
• Damaged or worn hose fittings leading to poor system pressure
• Faulty or missing service ports hindering A/C system diagnostics
• Corrosion or wear in OEM hose assemblies affecting performance
• Incompatibility with R134-a refrigerant systems requiring proper material and fittings

Installation Notes and Tips

Ensure the vehicle’s A/C system is fully evacuated before removing the old hose assembly. Verify that the P-nut fittings align correctly with the vehicle’s ports to avoid cross-threading. Replace all included O-rings and gaskets to maintain a proper seal. The integrated service port and switch port facilitate pressure testing and system charging. Follow manufacturer torque specifications for fittings to prevent leaks.

Quality Assurance and Warranty

The Four Seasons Hose Assembly 66864 is an OE replacement part designed to meet or exceed original equipment standards. It includes all necessary fittings, gaskets, and seals for a complete installation. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation for exact warranty terms.