Four Seasons 55640 A/C Refrigerant Suction Hose

Accumulator Hose Assembly for R134a Systems

Four Seasons 55640 is an accumulator with hose assembly for R134a air conditioning systems. It is built with an aluminum body, springlock connections, and an integrated low-side service port for service access on the suction side of the A/C circuit.

Compatible With 1994-1997 Ford Thunderbird and 1994-1996 Mercury Cougar applications that use an accumulator-style suction line. Four Seasons 55640 is also a direct-reference replacement for the same application family under several OE and aftermarket part numbers.

Key Features

• Brand: Four Seasons Accumulator line
• Part number: 55640
• R134a refrigerant type
• Accumulator w/ hose assembly construction
• Aluminum housing for the suction-side A/C line
• Male springlock inlet and female springlock discharge/suction ends
• 5/8 in inlet and 3/4 in outlet sizing
• Includes 1 low-side R134-A quick disconnect service port
• Includes 1 switch port with switch installed
• Meets or exceeds OEM specifications

Product Details

This accumulator hose assembly is used on the suction side of the HVAC system to route refrigerant vapor while supporting system service and pressure-switch integration. The Four Seasons Accumulator product line focuses on OE-style replacement components for A/C repair, and this 55640 assembly follows the original connection style and port layout used on select Ford and Mercury vehicles. It is a direct-fit style replacement for 1994-1997 Ford Thunderbird and 1994-1996 Mercury Cougar models listed in the fitment data.

This part cross-references Gates 51543 and UAC HA9984C for the same application.

What It Helps Fix

• Leaking suction hose connections at the accumulator assembly
• Damaged springlock fittings on the A/C refrigerant line
• Faulty low-side service access at the accumulator area
• Switch-port issues related to the suction-side pressure switch location
• Restricted or deteriorated accumulator hose routing in the HVAC system

Installation Notes and Tips

Verify refrigerant type, port style, and hose routing before installation. This assembly uses springlock connections and is specified for R134a systems, so the existing fittings and service equipment should match those requirements. Confirm the switch port and low-side service port locations against the original part before replacing the line on your Ford Thunderbird or Mercury Cougar.

• Fits 1994-1997 Ford Thunderbird, accumulator
• Fits 1994-1997 Ford Thunderbird, suction line w/ accumulator; accumulator
• Fits 1994-1996 Mercury Cougar, suction line w/ accumulator; accumulator
• Fits 1994-1995 Mercury Cougar, accumulator
• Fits 1994 Ford Cougar, suction line w/ accumulator; accumulator

Quality Assurance

Four Seasons 55640 is listed as meeting or exceeding OEM requirements for the specified application. The aluminum construction, OE-style springlock ends, and integrated service and switch ports support a factory-style replacement for select Ford Thunderbird and Mercury Cougar A/C repairs.