Q: How to Replace a Receiver-Drier in an R-134a System?
A: When replacing entire components, additional refrigerant oil must be added equal to the amount that is removed with the component being replaced. Be sure to read the label on the oil container to verify that it is compatible with the R-134a system before adding any of it to the system. Have the system discharged and the refrigerant recovered by an air conditioning technician. Remove the air filter housing. Remove both line fittings from the A/C accumulator. Plug all openings immediately to prevent contamination. Remove the mounting fasteners retaining the A/C accumulator bracket to the shock tower. Note the position of the ground strap (if equipped). Remove the A/C accumulator. Installation is the reverse of removal. Be sure to install new O-rings onto the line fittings and lightly coat them with the correct refrigerant oil. Only use O-rings that are designed specifically for A/C system applications. If you are replacing the A/C accumulator with a new unit, add 0.8-ounce (25 ml) of refrigerant oil to the replacement. Have the system evacuated, recharged and leak tested by the shop that discharged it.