TM 9-2320-387-24-2 25-l 5. A/C SYSTEM SERVICING (Cont’d) g. Adding Refrigerant Oil NOTE l It is not necessary to check or add oil as routine maintenance. It is necessary to add oil when the evaporator, condenser, compressor, or receiver/dryer has been replaced or there was an obvious oil leak. When a system is discharged, it is also necessary to replace any oil carried out with the refrigerant. l Vehicle must be on level ground. l A new compressor is charged with 6 oz of refrigerant oil. 1. If only the compressor is being replaced, drain and measure oil from compressor being replaced. Drain new compressor and add the same amount of refrigerant oil as was drained from old compressor. 2. If there is a loss of refrigerant over a period of time and a component is being replaced to correct leak, add refrigerant oil to the component being replaced as follows: l Condenser - 1 oz l Receiver/Dryer - 1 oz l Evaporator - 3 oz 3. When the system oil level is unknown, or system performance and efficiency are marginal, drain and flush system and add a new 6-02 charge of refrigerant oil to the system. FOLLOW-ON TASK: Lower and secure hood (TM 9-2320-387-10X 25-47
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