Receiver/Dryer Or Accumulator And RESTRICTOR, Replacing After Cleaning Refrigerant Circuit

NOTE:

Cleaning the refrigerant circuit means flushing it with refrigerant R134a. Refer to REFRIGERANT CIRCUIT, CLEANING (FLUSHING) WITH REFRIGERANT R134A or blowing through with compressed air and nitrogen. Refer to REFRIGERANT CIRCUIT, FLUSHING WITH COMPRESSED AIR AND NITROGEN ).

For example, on account of ingress of moisture (refrigerant circuit open for lengthy period) or contamination

-- Discharge the refrigerant circuit.

-- Remove the A/C compressor. Refer to A/C Compressor .

-- Rectify cause of trouble.

-- Clean the refrigerant circuit (flush with Refrigerant R134a). Refer to REFRIGERANT CIRCUIT, CLEANING (FLUSHING) WITH REFRIGERANT R134A .

-- Examine expansion valve for dirt or corrosion; replace if necessary.

Electrically-Driven A/C Compressor

-- Flush the old refrigerant oil out of A/C compressor ELECTRICALLY-DRIVEN A/C COMPRESSOR, FLUSHING (REMOVING REFRIGERANT OIL) .

Mechanically Driven A/C Compressor

-- Remove oil drain plug from A/C compressor.

NOTE:

There are different versions of the oil drain plug and its seal (it can be either an O-ring or a gasket; replace). Refer to LEAKING OR DAMAGED COMPONENTS EXCEPT A/C COMPRESSOR, RESERVOIR OR RECEIVER/DRYER and to the Parts Information.

-- To accelerate drainage of refrigerant oil, rotate the A/C compressor by way of clutch plate of A/C clutch, for example.

-- Pour old refrigerant oil out of A/C compressor.

NOTE:

Dispose of the old refrigerant oil. Pay attention to local regulations).

All A/C Compressors

-- Then add to the compressor the new refrigerant oil quantity which matches the refrigerant oil quantity in the replacement compressor (or the specified refrigerant oil quantity in vehicles with two evaporators if necessary) REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS .

NOTE:

Use different refrigerant oils and quantities for the various compressors. Refer to REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS .

To ensure compressor lubrication on start-up, at least 40 cm³ of refrigerant oil must be poured into the compressor. The remainder can be added to the new reservoir or receiver/dryer. Refer to REFRIGERANT R134A CAPACITIES, REFRIGERANT OIL AND APPROVED REFRIGERANT OILS .

If dirt has penetrated into the compressor with the refrigerant circuit open (e.g. after an accident), compressor is to be replaced.

In vehicles with two evaporators, the refrigerant oil quantity in refrigerant circuit may be greater than the quantity which is found in the replacement compressor, if necessary add the remaining refrigerant oil quantity to the refrigerant circuit. Refer to REFRIGERANT CIRCUIT, FLUSHING WITH COMPRESSED AIR AND NITROGEN .

All Vehicles

-- Replace receiver/dryer, or accumulator, and restrictor. Refer to Refrigerant Circuit .

-- Assemble, evacuate and charge the refrigerant circuit.