B4000 SE Cab Plus 4 4WD V6-4.0L OHV (2000)
Service Port HVAC: Description and Operation
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 receiver/drier.
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 low side service gauge ports.
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The Schrader-type valve 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.
