Mercury F5XZ-19D990-AB Seal - Special

A spring lock coupling tool is necessary to remove the orifice tube. The orifice tube changes the high-pressure liquid refrigerant into a low-pressure liquid. First, have the air conditioning system discharged by a dealer service department or by an automotive air conditioning shop. Then, remove the line clip and disconnect the condenser to evaporator line with a spring lock tool. Next, remove the orifice tube from the line with a pair of needle-nose pliers. If it's really stuck or breaks off, special extractor tools are available at most auto parts stores. The orifice tube is equipped with a tapered mesh screen that must be clean and free of damage. Installation is the reverse of removal. Be sure to remove and discard the old O-rings and replace them with new ones. Finally, take the vehicle back to the shop that discharged it. Have the system evacuated, recharged, and leak tested.

The orifice tube is located in the condenser-to-evaporator line. Its function is to change the high-pressure liquid refrigerant into a low-pressure liquid.