Refrigerant Oil: Service and Repair

Air Conditioning (A/C) System Oil Charge Replenishing

Tools Required

J 41459 A/C Oil Injector

Important: The addition of lubricating oil must be carried out whenever any component is replaced in the A/C system to compensate for oil trapped in the removed component. Carrying out this procedure ensures the A/C system always has the correct amount of oil as specified by the manufacturer.


1. Evacuate the A/C system for a minimum of 30 minutes and to minus 100 kPa negative gauge pressure. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).





Important: Make sure the valve (3) is in the closed position.


2. Remove the plunger (1) from the J 41459 (2) and pour in the appropriate amount of polyalkylene glycol (PAG) oil specified for the replaced component. Refer to Refrigerant System Capacities ([1][2]Capacity Specifications).
3. Jiggle the plunger (1) to remove any air in the J 41459 (2).




4. With the A/C system still evacuated, connect the J 41459 (1) to the low side charging port (2).
5. Turn the J 41459 shut off valve tap (3) to the open position to depress the low side charging port (2) schrader valve.
The oil should now be drawn into the A/C system due to the low pressure in the A/C system.




6. Once all the oil in the J 41459 (1) has moved into the A/C system, turn the shut off valve tap (3) to the closed position.
7. Remove the J 41459 (1) from the low side charging port (2).
8. Repeat steps 2 to 7 if more oil is required.