F 150 4WD Pickup V8-5.4L SOHC VIN 3 (1999)
Hose/Line HVAC: Description and Operation
NOTE: Replacement of the suction accumulator/drier is not required when repairing the air conditioning system except when there is physical evidence
of system contamination from a failed A/C compressor or damage to 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 the O-ring seals and has the following features:
-
The upstream side contains low pressure refrigerant gas.
-
The downstream side contains high pressure refrigerant gas.
-
An integral non-serviceable muffler and a serviceable high pressure A/C charge port valve are located on the downstream side.
-
The downstream side also contains a fitting used to mount the A/C pressure cut-off switch. A long-travel Scharder-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.
