Four Seasons 65639 A/C Refrigerant Liquid Hose

Overview of Four Seasons Hose Assembly 65639

The Four Seasons Hose Assembly 65639 is designed for high-pressure A/C refrigerant liquid line applications. Engineered with durable aluminum and rubber materials, this hose assembly is compatible with select Chevrolet, GMC, and Oldsmobile models, including the Blazer, Bravada, Jimmy, and S10. It provides reliable performance for vehicles using R134-a refrigerant.

• Constructed from aluminum and rubber for durability and flexibility
• Compatible with R134-a refrigerant systems operating under high pressure
• Includes gasket, fittings, and green O-rings for secure sealing
• Features a female liquid line with M20 x 1.5 thread size
• Equipped with a high side service port and orifice tube
• Designed without a bracket for streamlined installation

Four Seasons Hose Assembly Product Line Details

The Four Seasons Hose Assembly product line focuses on providing complete hose assemblies tailored for HVAC systems in vehicles. This line includes components such as fittings, gaskets, and service ports integrated into the hose assembly to ensure compatibility and ease of installation. The 65639 part number represents a liquid line hose assembly designed specifically for high-pressure refrigerant systems without a bracket, making it suitable for certain Chevrolet, GMC, and Oldsmobile models.

Technical Description and Features

This A/C refrigerant liquid hose assembly is built to meet original equipment specifications, making it an OE replacement for the listed vehicles. The hose features a female liquid line connection with a thread size of M20 x 1.5 and includes two green O-rings (part number 24649) to ensure a tight seal. The assembly comes with a service port sized at 16 mm on the high-pressure side, complete with a switch service port and orifice tube for system regulation. The absence of a bracket allows for flexible routing in the vehicle’s HVAC system.

Common Applications and Problem Solving

• Replacement of worn or leaking A/C refrigerant liquid hoses in Chevrolet Blazer, GMC Jimmy, and Oldsmobile Bravada
• Restoring proper refrigerant flow and pressure in R134-a systems
• Fixing leaks caused by damaged fittings or seals in the liquid line
• Addressing issues related to faulty orifice tubes affecting cooling performance
• Upgrading to a hose assembly with integrated service ports for easier maintenance

Installation Notes and Tips

When installing the Four Seasons Hose Assembly 65639, ensure the vehicle’s A/C system is fully evacuated and depressurized before removal of the old hose. Verify that the green O-rings are properly seated to prevent leaks. The female liquid line connection with M20 x 1.5 threading requires careful tightening to manufacturer torque specifications. Since this assembly does not include a bracket, confirm secure routing to avoid contact with moving parts or heat sources. Use the included fittings and gasket for a complete and secure installation.

Quality Assurance and Warranty

Four Seasons Hose Assembly 65639 is manufactured to meet or exceed OEM standards for durability and performance. It is an exact OE replacement part designed for compatibility with Chevrolet, GMC, and Oldsmobile vehicles. The product includes all necessary seals and fittings to ensure a reliable, leak-free installation. Warranty coverage details should be confirmed with the product documentation or manufacturer.