Refrigerant Oil Adding
REFRIGERANT OIL ADDINGSpecial Tool(s)
Special Tool(s):
Refrigerant Oil Adding
NOTE: 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.
1. Refer to the chart below for refrigerant oil adding amounts and methods of installation.
Refrigerant Oil Adding for New A/C Compressor Installation
NOTE:
- This refrigerant oil adding method is to be used when a new A/C compressor only has been installed. If a new suction accumulator or receiver drier and evaporator core orifice or thermostatic expansion valve (TXV) have also been installed due to system contamination, refer to the appropriate heading.
- Service A/C compressors are shipped without refrigerant oil.
1. Rotate the old A/C compressor shaft 8 to 10 full rotations (clockwise) while collecting the refrigerant oil in a clean measuring cup.
- Add the same amount plus the amount collected during refrigerant recovery plus 30 ml (1 fl oz).
Refrigerant Oil Adding for New Suction Accumulator or Receiver/Drier Installation
NOTE: This refrigerant oil adding method is to be used when a new suction accumulator or receiver drier only has been installed. If a new A/C compressor and evaporator core orifice or thermostatic expansion valve (TXV) have also been installed due to system contamination, refer to the appropriate heading.
1. Drill one 12.7 mm (1/2 in) hole in the old suction accumulator or receiver/drier cylinder and drain the oil into a clean measuring cup.
2. Add the quantity of oil drained, plus the amount collected during refrigerant recovery and 60 ml (2 fl oz).
Refrigerant Oil Adding for Multiple Component Installation After A/C System Contamination
NOTE:
- This refrigerant oil adding method is to be used when a new A/C compressor, suction accumulator or receiver drier and evaporator core orifice or thermostatic expansion valve (TXV) have been installed due to system contamination and the A/C system has been flushed.
- Service A/C compressors are shipped without refrigerant oil.
1. Add 60 ml (2 fl oz) directly to the new A/C compressor suction port.
2. Inject the total vehicle PAG refrigerant oil capacity minus 60 ml (2 fl oz) to the low-side service port during system charging. For the total PAG oil capacity specification, refer to the specifications table.
Oil Injection Using a Dye/Lubricant Injector
NOTE: If fluorescent leak detection dye is also to be added during A/C charging, the dye may be added to the dye/lubricant injector along with the refrigerant oil.
1. Evacuate the refrigerant system.
2. Assemble the dye/lubricant injector using the correct adapters to match the amount of refrigerant compressor oil to be injected.
3. Verify that all the valves on the dye/lubricant injector are closed.
4. Fill the dye/lubricant injector with the correct amount of clean, new PAG oil.
5. Install the dye/lubricant injector between the low-side service gauge port valve and the refrigerant service station or manifold gauge set.
6. Open all valves and charge the refrigerant system.