Refrigerant Oil: Service and Repair
Refrigerant Oil AdditionCAUTION: During normal A/C operation, oil is circulated through the system with the refrigerant, and a small amount is retained in each component. If certain components of the system are removed, some of the refrigerant oil will go with the component. To maintain the original total oil charge, it is necessary to compensate for the oil lost by adding oil to the system with the new part.
NOTE: Installation of new components such as the A/C pressure transducer do not require additional oil.
1. Rotate the A/C compressor shaft six to eight revolutions while collecting the oil in a clean measuring device.
- If the amount of oil drained from the old A/C compressor is between 90-150 ml (3-5 ounces), pour the same amount plus 30 ml (1 ounce) of clean PAG Refrigerant Compressor Oil YN-12-C, F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B into the new A/C compressor.
- If the amount of oil that was removed from the old A/C compressor is greater than 150 ml (5 ounces), pour the same amount drained of clean PAG Refrigerant Compressor Oil YN-12-C, F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B into the new A/C compressor.
- If the amount of oil that was removed from the old A/C compressor is less than 90 ml (3 ounces), pour 90 ml (3 ounces) of clean PAG Refrigerant Compressor Oil YN-12-C, F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231 -B into the new A/C compressor.
NOTE: New A/C compressors are shipped without compressor oil.
2. For the receiver/drier, drill two 12.7 mm (0.5 in) holes in the receiver/drier cylinder and drain the oil into a calibrated container.
- Add a quantity of new oil to match that drained from the old receiver/drier plus 40 ml (1.5 ounces) of clean PAG Refrigerant Compressor Oil YN-12-C, F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B.
3. For the A/C evaporator core add 30 ml (1 ounce) of clean PAG Refrigerant Compressor Oil YN-12-C, F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B to the receiver/drier inlet tube.
4. For the A/C condenser core, add 30 ml (1 ounce) of clean PAG Refrigerant Compressor Oil YN-12-C, F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B to the A/C condenser core or the receiver/drier inlet tube.
5. Add 20 ml (0.75 ounces) of clean PAG Refrigerant Compressor Oil YN-12-C, F7AZ-19A589-DA or equivalent meeting Ford specification WSH-M1C231-B to the receiver/drier inlet tube when carrying out each of the following repairs:
- installation of a new TXV
- installation of a new A/C compressor pressure relief valve
- installation of a new refrigerant line
- Repair of an O-ring seal leak
- repair of a charge port leak