Refrigerant Oil: Service and Repair

ADDING OIL TO THE SYSTEM







- The oil should be replaced whenever a ruptured component is replaced, because the quick discharge causes some of the oil to be released along with the refrigerant
- Use only PAG oil in an R-134a system (not mineral oil)
- Use only mineral oil in an R-12 system (not PAG oil).
- Add the right amount of oil into the system when replacing a major component such as the compressor; condenser, or evaporator.

- When replacing the compressor; drain the oil from the old compressor and measure the amount. Turning the clutch plate by hand helps "pump" out any remaining oil. Inject an equal amount of fresh oil. Note: service compressors are shipped full of oil; this oil must be drained before the new compressor is installed.
- When replacing the condenser or evaporator, add 2 oz. of oil to the system.
- When replacing a receiver/dryer, add 1 oz. of oil to the system.
- You do not need to add any oil when replacing a hose, since hoses do not collect much oil.

- Oil can be added to a charged system using the Robinair 18065 oil injector and a manifold gauge set, or the injector bottle on the ACR4 unit.