Four Seasons 55278 A/C Refrigerant Suction Hose

Four Seasons 55278 A/C Suction Hose Accumulator

Four Seasons 55278 is an accumulator with hose assembly for R134a air conditioning systems. It is built with a steel body, a low-side suction-side layout, and OE-style connection points for direct replacement service on select Ford Mustang applications.

Key Features

• Accumulator body length: 7.000 in. / 177.800 mm
• Accumulator body diameter: 3.500 in. / 89.000 mm
• R134a refrigerant type
• Female O-ring inlet with 1/2 in. inlet fraction
• Male insert O-ring outlet with 9/16 in. outlet fraction
• Low-side suction-side design with hose assembly
• Steel construction with mounting bracket included
• Switch port included; service port not included
• Meets or exceeds OEM requirements

Product Details

This Four Seasons accumulator line part is engineered for HVAC hose and pipe service where the suction-side accumulator is part of the A/C circuit. Part number 55278 is listed for 1986-1993 Ford Mustang applications, including 1993 Ford Mustang accumulator and suction line with accumulator configurations, as well as 1986-1992 Ford Mustang vehicles with factory air. This part cross-references Ford OE-style numbers such as E7ZZ19C836B and aftermarket references including A70994 for the same application.

As part of the Four Seasons Accumulator line, 55278 focuses on replacement fit and connection style for R134a service. The female O-ring inlet, male insert O-ring outlet, and low-side switch port support a direct-service approach for vehicles that use this accumulator and hose arrangement. If you are sourcing a Ford Mustang A/C suction hose accumulator, Four Seasons 55278 is built around the original system layout.

Common A/C Problems This Part Can Address

• Leaking suction-side accumulator housing or hose connections
• Damaged or corroded steel accumulator body
• Improper low-side refrigerant routing at the accumulator assembly
• Failed O-ring sealing surfaces at the inlet or outlet
• Switch-port service issues on the accumulator assembly

Installation Notes

Verify refrigerant type, inlet and outlet connection sizes, and the presence of the switch port before installation. Replace sealing O-rings and evacuate and recharge the system according to the vehicle service procedure. Confirm fitment for 1986-1993 Ford Mustang, accumulator and suction line with accumulator configurations, before ordering.

Quality Assurance

Four Seasons states that this part meets or exceeds OEM requirements. The accumulator is built for OE-style replacement service in R134a HVAC systems and is intended to match the original connection and mounting layout used on the listed Ford Mustang applications.