Suction Accumulator/Drier

NOTE: Replacement of the suction accumulator/drier is not required when repairing the air conditioning system except when there is physical evidence of system contamination from a failed A/C compressor or damage to the suction accumulator/drier.

The suction accumulator/drier (19C836) is mounted on the side of the A/C evaporator core (19860) and attaches directly to the outlet tube. A suction service access gauge port valve is mounted on the inlet fitting of the suction accumulator/drier. Its purpose is to provide service access to the suction side of the refrigerant system for pressure readings, system diagnosis, and system charging. An inverted liquid diverter cup is mounted internally on top of the refrigerant vapor return tube, in the center of the suction accumulator/drier. Its purpose is to prevent the heavier, oil-laden liquid refrigerant from going directly into the evaporator to compressor suction line (19867) . Upon entering the inlet of the suction accumulator/drier, the heavier, oil-laden refrigerant contacts the liquid diverter cup, which serves as an umbrella, and drips down onto the bottom of the housing. A small diameter aspirator tube, with approximately 3.34mm (0.1315 inch) inside diameter, is placed close to the bottom of the suction accumulator/drier at one end and to the top of the vapor return tube at the other end. It allows the accumulated heavier liquid refrigerant and oil mixture to re-enter the evaporator to compressor suction line at a controlled rate. The mixture passes through the aspirator tube and circulates through the A/C compressor (19703) without causing compressor damage due to slugging. A fine mesh-screened filter fits tightly around the bottom of the aspirator tube to filter refrigerant contaminants that may be in the system and prevent them from plugging the aspirator tube.

A desiccant bag is mounted inside the suction accumulator/drier tank assembly to absorb any moisture which may be in the refrigerant system.

Another fitting on the suction accumulator/drier, is used to mount the A/C cycling switch (19E561). It has a long-travel, Schrader-type valve stem core installed in the fitting opening to prevent refrigerant loss when the A/C cycling switch is removed.

Item	Part Number	Description
1	19C836	Suction Accumulator/Drier
2	19E561	A/C Cycling Switch
3	19867	Evaporator to Compressor Suction Line
4	19D607	A/C Accumulator Bracket
5	—	Evaporator to Accumulator Inlet Fitting (Part of 19C808)
6	19D702	A/C Charging Valve Cap