Charging From Drum

Charging with a Charging Cylinder

1. With the gauge set valve closed to the center hose, disconnect the vacuum pump from the gauge set.

2. Connect the center hose of the gauge set to a charging cylinder or refrigerant tank.

3. Loosen the center hose at the gauge set and open the charging cylinder or refrigerant drum valve. Allow refrigerant to escape to purge air and moisture from the center hose. Then, tighten the center hose connection at the gauge set.

4. Open the gauge set low side valve to allow refrigerant to enter the system.

5. When no more refrigerant is being drawn into the system, start the engine and move the function selector lever to the NORM/A/C position in Aerostar vehicles, and the VENT/HEAT/A/C position in Ranger and Explorer vehicles. Move the heater blower motor switch to HI to draw the remaining refrigerant into the system.

Continue to add refrigerant to the system until the specified weight of R-134a is in the system. Then, close the gauge set low pressure valve and the refrigerant supply valve.

6. Operate the system until the pressures stabilize to verify normal operation and system pressures.

7. In high ambient temperatures, it may be necessary to operate a high volume fan positioned to blow air through the radiator and A/C condenser core to aid in cooling the engine and prevent excessive refrigerant system pressures.

8. When charging is completed and system operating pressures are normal, disconnect the gauge set from the vehicle. Install A/C charging valve caps on the service gauge port valves.