Refrigerant Oil: Service and Repair
HANDLING OF OIL1. The oil should be free from moisture, dust, metal filings, etc.
2. Do not mix oils.
3. The moisture content in the oil increases when exposed to the air for prolonged periods. After use, seal the container immediately.
OIL RETURN OPERATION
To check the oil level or add the oil, idle the engine for 20 - 30 minutes with the controls set to maximum cooling and blower level, to return the lubricant to compressor
CHECKING AND ADDING OF COMPRESSOR OIL LEVEL
In order to add oil to an operating compressor, check the compressor oil using the following procedure:
1. Stop the engine, discharge the refrigerant, and dismantle the compressor from the vehicle.
2. Pour oil from the system line outlet.
3. Check the volume of the discharged oil. If it is less than 70 cc, it means there is little leak. Perform the leakage test on each system connection, and repair or replace faulty parts if necessary.
4. Check the oil for contamination and replenish the 0 level in the following procedure:
a. When oil is clean
b. If the oil is contaminated with metal fragments or other material, clean the receiver drier after charging the refrigerant.