Refrigerant Oil: Service and Repair
LUBRICANTMaintenance of Lubricant Quantity in Compressor
The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compressor when replacing any component or after a large refrigerant leakage has occurred. It is important to maintain the specified amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:
- Lack of lubricant, may lead to a seized compressor.
- Excessive lubricant, may cause inadequate cooling (thermal exchange interference).
LUBRICANT
Checking And Adjusting (Steps 1 - 3):
Checking And Adjusting (Step 4):
CHECKING AND ADJUSTING
Adjust the lubricant quantity according to the test group shown.
Lubricant Adjusting Procedure for Components Replacement Except Compressor
After replacing any of the following major components, add the correct amount of lubricant to the system.
Amount of Lubricant to be Added
Lubricant Adjustment Procedure for Compressor Replacement
1. Before connecting the recovery/recycling equipment to vehicle, check the recovery/recycling equipment gauges. No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.
2. Connect the recovery/recycling equipment to vehicle. Confirm refrigerant purity in supply tank using the recovery/recycling equipment and refrigerant identifier. If NG, refer to "Contaminated Refrigerant".
3. Confirm refrigerant purity in vehicle A/C system using the recovery/recycling equipment and refrigerant identifier. If NG, refer to "Contaminated Refrigerant".
4. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into the recovery/recycling equipment.
5. Drain the lubricant from the "old" (removed) compressor into a graduated container and recover the amount of lubricant drained.
6. Drain the lubricant from the "new" compressor into a separate clean container.
7. Measure an amount of new lubricant installed equal to amount drained from "old" compressor. Add this lubricant to "new" compressor through the suction port opening.
8. Measure an amount of new lubricant equal to the amount recovered during discharging. Add this lubricant to "new" compressor through the suction port opening.
9. If the liquid tank also needs to be replaced, add an additional 5 ml (0.2 US fl oz, 0.2 Imp fl oz) of lubricant at this time.
CAUTION: Do not add this 5 ml (0.2 US fl oz, 0.2 Imp fl oz) of lubricant if only replacing the compressor.