F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
Compressor Fitting HVAC: Description and Operation
The A/C manifold and tube is attached to the A/C compressor, is sealed with the 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 cutoff switch. A long-travel Schrader-type valve stemcore is installed
in the fitting so that the A/C pressure cut-off switch can be removed without discharging the A/C system.
