Expedition 4WD V8-281 4.6L SOHC (1998)
Hose/Line HVAC: Description and Operation
Refrigerant Lines
NOTE: Whenever a refrigerant line is replaced, it is also necessary to replace the suction accumulator/drier.
The condenser to evaporator tube contains high pressure liquid refrigerant upstream of the A/C evaporator core orifice.
The A/C manifold and tube is attached to the A/C compressor with O-ring seals and has the following features:
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the upstream side contains low pressure refrigerant gas.
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the downstream side contains high pressure refrigerant gas.
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an integral non-serviceable muffler and a serviceable high pressure A/C charge port valve are located on the downstream side.
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the downstream side also contains a fitting used to mount the A/C pressure cut-off switch. A long-travel Schrader-type valve stem core is installed
in the fitting so that the A/C pressure cut-off switch can be removed without discharging the A/C system.
