F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Service Port HVAC: Service and Repair
WARNING: BEFORE ANY SERVICING OF THE A/C SERVICE GAUGE PORT VALVES CAN BE PERFORMED, THE REFRIGERANT
SYSTEM MUST BE RECOVERED. SEE REFRIGERANT RECOVERY. See: Service and Repair/Refrigerant Recovery
NOTE: The A/C service port valves are of the one-piece design. The top portion of the fitting is aluminum and is threaded into a steel body on the
suction accumulator I drier or on a refrigerant line and sealed with an O-ring seal. The valve seal is an integral part of the aluminum fitting piece that
must be replaced if the seal leaks. Two special service tools have been developed to aid in the servicing of the service access gauge port valves. They are
High Side A/C Fitting Socket D94L-19703-A or equivalent and Low Side A/C Fitting Socket D94L-19703-B or equivalent. The Schrader valve core
used on R-12 systems is NOT used. The high side fitting is the largest of the two valves. Both valves require special adapters to attach service equipment
to the A/C system. In addition to the tools listed previously, see Tools and Equipment for other tools that are required whenever the A/C system is
serviced. See: Tools and Equipment
