Tools Required

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

1. 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.

2. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
3. Remove the orifice tube. Refer to Expansion (Orifice) Tube Filter Replacement .
4. Connect the A/C lines with the orifice tube removed.
5. Remove the A/C compressor. Refer to Air Conditioning Compressor Replacement .
6. Install the J 45268-3 to the A/C compressor hose assembly.



7. 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.

7.1.	Service the filter with ACDelco P/N GF 470, before each flush.

Connect the J 45268-1 flush filter to the suction port of the J 45268-3 flush adapter.

7.2.	Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.

7.3.	Connect the red hose from the J 43600 to the J 45268-3.

8. Reverse flow refrigerant flushing is recommended for desiccant bag failure only.

Perform the following procedure and replace the accumulator when the flush is complete:

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

8.1.	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--3 flush adapter.

8.2.	Connect the blue hose from the J 43600 to the J 45268-1 flush filter adapter.

8.3.	Connect the red hose from the J 43600 to the suction port of the J 45268-3.

9. Flush the A/C system. Follow the instructions supplied with the J 43600 .

Close the valve on the external refrigerant tank, before starting the flush process.

10. Remove the J 45268-3 from the A/C compressor hose assembly.
11. Remove the A/C compressor drain plug.
12. Install the A/C compressor drain plug.

Tighten
Tighten the drain plug to 20 N·m (15 lb ft).

13. Install the A/C compressor. Refer to Air Conditioning Compressor Replacement .
14. Inspect the orifice tube for debris.

Clean or replace as needed.

15. Install the orifice tube. Refer to Expansion (Orifice) Tube Filter Replacement .
16. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .

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

17. 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.

18. Add one bottle of J 41447 using the J 41459 .
19. Leak test the fittings using the J 42220 .