Four Seasons 66312 A/C Refrigerant Suction Hose

Overview of Four Seasons Hose Assembly 66312

The Four Seasons Hose Assembly 66312 is designed specifically for Mercedes-Benz models including GL320, GL350, GL450, GL500, GL550, ML63 AMG, ML320, ML350, ML500, and ML550. This A/C refrigerant suction hose ensures reliable low-pressure refrigerant flow within your vehicle's HVAC system.

• Constructed from durable aluminum and rubber materials
• Equipped with a P-nut fitting on suction end and block fitting on the other end
• Compatible with R134a refrigerant systems
• Includes gasket, fittings, and a green O-ring (part number 24622)
• Features a switch service port but does not include a switch or muffler
• OE replacement part designed for direct fitment
• Part number 66312 ensures precise identification and compatibility

Four Seasons Hose Assembly Product Line Details

The Four Seasons Hose Assembly product line focuses on delivering reliable hose assemblies for automotive HVAC systems. This line emphasizes quality materials and precise fitment to maintain system integrity and performance. The 66312 suction hose assembly is part of this line, providing a direct OE replacement that meets the specifications required for Mercedes-Benz low-pressure A/C refrigerant lines.

Detailed Product Description

This A/C refrigerant suction hose assembly combines aluminum and rubber to provide durability and flexibility under varying operating conditions. The P-nut fitting on the suction end and block fitting on the opposite end ensure secure connections within the HVAC system. Designed for use with R134a refrigerant, this hose assembly operates under low system pressure and includes all necessary fittings and a green O-ring for a proper seal. The inclusion of a switch service port allows for easy system diagnostics, although the switch itself is not included. This hose assembly does not come with a bracket or muffler, consistent with original equipment specifications.

Common Applications and Issues Addressed

• Replacement of worn or leaking A/C refrigerant suction hoses in Mercedes-Benz GL and ML series vehicles
• Restoring proper refrigerant flow to improve A/C system efficiency
• Eliminating low-pressure leaks that can cause system performance issues
• Addressing damage from corrosion or physical wear on original hoses
• Ensuring compatibility with R134a refrigerant systems for proper operation

Installation Notes and Tips

When installing the Four Seasons Hose Assembly 66312, ensure all fittings and seals are properly seated to prevent leaks. Use the included green O-ring (part number 24622) and gasket to maintain a secure seal. Verify that the P-nut fitting and block fitting align correctly with the vehicle’s HVAC system ports. Since the assembly does not include a bracket or muffler, reuse the original components if applicable. Check for any signs of damage or wear on adjacent components during installation.

Quality Assurance and Warranty

Four Seasons provides this hose assembly as an OE replacement part, meeting original equipment specifications for fit and function. The materials and construction are designed to withstand typical operating pressures and environmental conditions found in Mercedes-Benz HVAC systems. While specific warranty details are not provided here, Four Seasons products generally come with a limited warranty against defects in material and workmanship.