F 450 4WD Super Duty V10-6.8L VIN D (2004)
Service Port HVAC: Description and Operation
SERVICE GAUGE PORT VALVES
The high-pressure service gauge port valve is located on the A/C manifold and tube.
The low pressure service gauge port valve is located on the suction accumulator.
The fitting is an integral part of the refrigeration line or component.
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Special couplings are required for both the high side and the low side service gauge ports.
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The Schrader valve-type core can be replaced if the seal leaks.
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Always install the A/C charging valve cap on the service gauge port valves after repairing the refrigerant system.
