Suction Accumulator/Drier Replacement Guidelines

Replacement of the suction accumulator/drier (19C836) is necessary any time a major component of the refrigerant system is replaced. A major component includes A/C condenser core (19712) , A/C compressor (19703) , A/C evaporator core (19860) or a refrigerant hose/line. An A/C evaporator core orifice (19D990) or O-ring seal is not considered a major component but the A/C evaporator core orifice should be replaced whenever the A/C compressor is replaced for lack of performance.

In addition to the preceding condition, the suction accumulator/drier should also be replaced if one of the following conditions exist:

• The suction accumulator/drier is perforated.
• The refrigerant system has been opened to the atmosphere for a period of time longer than required to make a minor repair.
• There is evidence of moisture in the system such as internal corrosion of metal refrigerant lines or the refrigerant oil is thick and dark.

NOTE: The compressor oil from vehicles equipped with an FS-10 A/C compressor may have a dark color while maintaining a normal oil viscosity. This is normal for this A/C compressor because carbon from the piston rings will discolor the oil.

When replacing the suction accumulator/drier , the procedure given here must be followed to ensure that the total oil charge in the system is correct after the new suction accumulator/drier is installed.

1. Drain the oil from the removed suction accumulator/drier into a suitable measuring container. Drill one or two 1/2-inch holes in the bottom of the old suction accumulator/drier to ensure that all the oil has drained out.

2. Add the same amount of clean new refrigerant oil plus two fluid ounces to the new suction accumulator/drier . Use only the oil specified for the specific vehicle being serviced (Motorcraft YN-12 or an equivalent oil containing the same additives).