Refrigerant: Service and Repair

If oil was removed from the A/C system during the recovery process or due to component replacement, the oil must be replenished. Oil can be injected into a charged system using J 45037 For the proper quantities of oil to add to the A/C refrigerant system, refer to Refrigerant System Capacities.

Flushing
TOOLS REQUIRED
^ J 43600 Air Conditioning Service Center
^ J 45268 Flush Adapter Kit
^ J 41447 Leak Detection Dye
^ J 41459 Leak Detection Dye Injector
^ J 42220 Universal Leak Detection Lamp

IMPORTANT: Flushing is not intended to remove metal from the A/C system.

Flushing is intended to remove the following:
^ Contaminated PAG oil
^ Desiccant, following a desiccant bag failure
^ Overcharge of PAG oil
^ Refrigerant contamination

IMPORTANT: Warmer engine or ambient temperature decreases the refrigerant recovery time during the A/C flush procedure.




1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Remove the orifice tube.
3. Connect the A/C lines with the orifice tube removed.
4. Remove the A/C compressor.
5. Inspect the end of the suction hose for a suction screen.
6. Remove the suction screen, if installed.
7. Install the J 45268-4 to the A/C compressor suction hose.
8. install the J 45268-5 to the A/C compressor discharge hose.
9. Forward flow refrigerant flushing is recommended for contaminated refrigerant or PAG oil. Perform the following procedure:

IMPORTANT: The filter inside the J 45268-1 is serviceable. Remove and discard the check valve from the filter.

9.1. Service the filter with AC P/N GF 470, before each flush.
Connect the J 45268-1 flush filter to the suction port of the J 45268-4 flush adapter.
9.2. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
9.3. Connect the red hose from the J 43600 to the J 45268-5 flush adapter.
10. Reverse flow refrigerant flushing is recommended for desiccant bag failure.
Perform the following procedure and replace the accumulator when the flush procedure is complete.

IMPORTANT: The filter inside the J 45268-1 is serviceable. Remove and discard the check valve from the filter.

10.1. Service the filter with AC P/N GF 470, before each flush.
Connect the J 45268-1 flush filter to the discharge port of the J 45268-5 flush adapter.
10.2. Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.
10.3. Connect the red hose from the J 43600 to the suction port of the J 45268-4 flush adapter.




11. Flush the front A/C system. Follow the instructions supplied with the J 43600.
Close the valve on the external refrigerant tank, before starting the flush process.

IMPORTANT: Flush the front A/C system before flushing the auxiliary A/C system.

12. If the vehicle is equipped with rear A/C, flush the auxiliary A/C system separately.
13. Cut the orifice tube frame and screen, enough to access the end of the orifice tube Pinch off the orifice tube.

IMPORTANT: Pinch off the orifice tube in order to prevent refrigerant flow to the front system during the auxiliary system flush.




14. Install the pinched orifice tube.
15. Remove the auxiliary TXV.
16. Install the J 45268-104.

IMPORTANT: The auxiliary evaporator core can be flushed without totally reassembling into the auxiliary HVAC module.

17. Install the auxiliary evaporator core to the A/C lines.
18. Raise the vehicle. Refer to Lifting and Jacking the Vehicle on page.
19. Connect the auxiliary A/C lines to the auxiliary evaporator core.
20. Lower the vehicle.
21. Flush the auxiliary A/C system. Follow the instructions supplied with the J 43600.
22. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
23. Remove the auxiliary A/C lines from the auxiliary evaporator core.
24. Lower the vehicle.
25. Remove the J 45268-104.
26. Inspect the TXV for debris. Clean or replace as needed.
27. Install the auxiliary TXV.
28. Remove the J 45268-4 from the A/C compressor suction hose.
29. Remove the J 45268-5 from the A/C compressor discharge hose.
^ Drain the PAG oil from the A/C compressor, through the suction and discharge ports.
^ Rotate the compressor input shaft to assist in draining the PAG oil from the A/C compressor.
30. Install the A/C compressor.
31. Install a new orifice tube.
32. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.

IMPORTANT: Flushing will remove all of the PAG oil from the A/C system.

33. Add the total system capacity of PAG oil to the A/C system. Refer to Refrigerant System Capacities.

IMPORTANT: Flushing will remove the fluorescent leak detection dye from the A/C system.

34. Add one bottle of J 41447 using the J 41459.
35. Leak test the fittings using the J 42220.