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Subaru Air Conditioning Systems
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End Wrench
The
12
Fill the compressor with the proper amount of the correct type refrigerant oil.
Use of the incorrect type of compressor oil may result in damage to the com-
pressor. Refer to Subaru Service Bulletin number 10-37-84, dated 12-12-84, for
compressor oil specifications for Matsushita (Panasonic), Hitachi, Lone Star and
other compressor types. Always manually rotate the compressor several turns to
confirm proper operation after filling with refrigerant oil.
Note: The variable displacement Calsonic and DIESEL KIKI compressors
may only be filled with special V-5 compressor oil, (D-9OPX). Any
contamination with other types of compressor oils will cause
compressor damage. Never substitute or cross-contaminate R-12
compatible compressor oil with R-134a compatible compressor oil.
Refer to the Oil Charge Table found in Section 4-7 of the appropriate model
year Service Manual. This can be a useful tool to determine the proper procedure
to follow and to determine the amount of refrigerant oil to add or replace to the
compressor after servicing, repairing, or replacing major system components.
Always manually rotate the compressor several turns to confirm proper operation.
Performance Testing
Test Conditions
• The vehicle must be indoors or in the shade.
• Doors should be closed, all windows open.
• Hood open.
• Connect the manifold gauge.
• Set the mode switch to the A/C MAX position. (On variable displacement
compressor system set the A/C controls to high blower and normal A/C.)
Note: When servicing variable displacement compressors refer to Service Bulletin,
10-52-89, dated 07-28-89, for complete compressor diagnostic information.
• Set the temperature control to COLD.
• Start the engine and idle at 1,500 RPM.
• Operate for approximately 10 minutes, then observe the high and the low
pressure levels.
An essential step of the performance test is measuring the temperature of the
inlet air at the blower and the temperature of the outlet air at the vent grills. The
temperature difference should be within specifications for the system. System
temperatures will vary with changing conditions, such as high ambient air
temperature, humidity, and altitude.
Temperature Measurement