B3000 SE Regular Cab 4WD V6-3.0L OHV (1998)
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.
- Special couplings are required for both the high side and low side service gauge ports.
- The Schrader-type valve core can be replaced if the seal leaks.
- Always install the A/C charging valve cap on the service gauge port valves after repairing the refrigerant system.