Refrigerant lines are secured with either a threaded type fitting or a spring- lock connection. Whichever type fitting is used on the line, it is very important to use the correct tools to remove or install one of these lines. If the line is a threaded fitting, use back-up wrenches to loosen and tighten the connection. Spring-lock connectors require a special tool to remove the locking pin inside the tube. Because refrigerant lines can be different diameters, there are different diameter spring-lock tools. Before disassembling a refrigerant line, make sure you correctly match the disconnect tool to the A/C line.
REMOVAL & INSTALLATION
- Disconnect the negative battery cable.
- Discharge the A/C refrigerant from the system using the proper procedure.
- Determine whether the refrigerant line to be removed is a threaded fitting, or a spring-lock fitting.
- If removing a threaded line, use a back-up wrench to loosen fitting.
- If removing a spring-lock fitting, use correct spring-lock tool as necessary.
- Remove line from vehicle.
- Route new refrigerant line with protective caps installed.
- Connect the new line into the A/C system using new O-rings oiled with refrigerant oil. Tighten the connection to 7.0 ft. lbs. (9 Nm) for a self-sealing coupling and 15-20 ft. lbs. (21-27 Nm) for non-self-sealing coupling. Use back-up wrenches to prevent component damage, or use a spring-lock procedure if applicable.
- Connect the negative battery.
- Leak test, evacuate and charge the A/C system according to the proper procedures.
- Check A/C system for the proper operation.